From 144552c786925314c1e7cb8f91a71dae1aca8798 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:24:17 -0700 Subject: of: overlay: add tests to validate kfrees from overlay removal Add checks: - attempted kfree due to refcount reaching zero before overlay is removed - properties linked to an overlay node when the node is removed - node refcount > one during node removal in a changeset destroy, if the node was created by the changeset After applying this patch, several validation warnings will be reported from the devicetree unittest during boot due to pre-existing devicetree bugs. The warnings will be similar to: OF: ERROR: of_node_release(), unexpected properties in /testcase-data/overlay-node/test-bus/test-unittest11 OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /testcase-data-2/substation@100/ hvac-medium-2 Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/dynamic.c | 29 +++++++++++++++++++++++++++++ drivers/of/overlay.c | 1 + 2 files changed, 30 insertions(+) (limited to 'drivers') diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index f4f8ed9b5454..12c3f9a15e94 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -330,6 +330,25 @@ void of_node_release(struct kobject *kobj) if (!of_node_check_flag(node, OF_DYNAMIC)) return; + if (of_node_check_flag(node, OF_OVERLAY)) { + + if (!of_node_check_flag(node, OF_OVERLAY_FREE_CSET)) { + /* premature refcount of zero, do not free memory */ + pr_err("ERROR: memory leak before free overlay changeset, %pOF\n", + node); + return; + } + + /* + * If node->properties non-empty then properties were added + * to this node either by different overlay that has not + * yet been removed, or by a non-overlay mechanism. + */ + if (node->properties) + pr_err("ERROR: %s(), unexpected properties in %pOF\n", + __func__, node); + } + property_list_free(node->properties); property_list_free(node->deadprops); @@ -434,6 +453,16 @@ struct device_node *__of_node_dup(const struct device_node *np, static void __of_changeset_entry_destroy(struct of_changeset_entry *ce) { + if (ce->action == OF_RECONFIG_ATTACH_NODE && + of_node_check_flag(ce->np, OF_OVERLAY)) { + if (kref_read(&ce->np->kobj.kref) > 1) { + pr_err("ERROR: memory leak, expected refcount 1 instead of %d, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node %pOF\n", + kref_read(&ce->np->kobj.kref), ce->np); + } else { + of_node_set_flag(ce->np, OF_OVERLAY_FREE_CSET); + } + } + of_node_put(ce->np); list_del(&ce->node); kfree(ce); diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 42b1f73ac5f6..f5fc8859a7ee 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -373,6 +373,7 @@ static int add_changeset_node(struct overlay_changeset *ovcs, return -ENOMEM; tchild->parent = target_node; + of_node_set_flag(tchild, OF_OVERLAY); ret = of_changeset_attach_node(&ovcs->cset, tchild); if (ret) -- cgit v1.2.3-70-g09d2 From 7c528e457d53c75107d5aa56892316d265c778de Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:25:13 -0700 Subject: of: overlay: add missing of_node_put() after add new node to changeset The refcount of a newly added overlay node decrements to one (instead of zero) when the overlay changeset is destroyed. This change will cause the final decrement be to zero. After applying this patch, new validation warnings will be reported from the devicetree unittest during boot due to a pre-existing devicetree bug. The warnings will be similar to: OF: ERROR: memory leak before free overlay changeset, /testcase-data/overlay-node/test-bus/test-unittest4 This pre-existing devicetree bug will also trigger a WARN_ONCE() from refcount_sub_and_test_checked() when an overlay changeset is destroyed without having first been applied. This scenario occurs when an error in the overlay is detected during the overlay changeset creation: WARNING: CPU: 0 PID: 1 at lib/refcount.c:187 refcount_sub_and_test_checked+0xa8/0xbc refcount_t: underflow; use-after-free. (unwind_backtrace) from (show_stack+0x10/0x14) (show_stack) from (dump_stack+0x6c/0x8c) (dump_stack) from (__warn+0xdc/0x104) (__warn) from (warn_slowpath_fmt+0x44/0x6c) (warn_slowpath_fmt) from (refcount_sub_and_test_checked+0xa8/0xbc) (refcount_sub_and_test_checked) from (kobject_put+0x24/0x208) (kobject_put) from (of_changeset_destroy+0x2c/0xb4) (of_changeset_destroy) from (free_overlay_changeset+0x1c/0x9c) (free_overlay_changeset) from (of_overlay_remove+0x284/0x2cc) (of_overlay_remove) from (of_unittest_apply_revert_overlay_check.constprop.4+0xf8/0x1e8) (of_unittest_apply_revert_overlay_check.constprop.4) from (of_unittest_overlay+0x960/0xed8) (of_unittest_overlay) from (of_unittest+0x1cc4/0x2138) (of_unittest) from (do_one_initcall+0x4c/0x28c) (do_one_initcall) from (kernel_init_freeable+0x29c/0x378) (kernel_init_freeable) from (kernel_init+0x8/0x110) (kernel_init) from (ret_from_fork+0x14/0x2c) Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/overlay.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index f5fc8859a7ee..7613f7d680c7 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -379,7 +379,9 @@ static int add_changeset_node(struct overlay_changeset *ovcs, if (ret) return ret; - return build_changeset_next_level(ovcs, tchild, node); + ret = build_changeset_next_level(ovcs, tchild, node); + of_node_put(tchild); + return ret; } if (node->phandle && tchild->phandle) -- cgit v1.2.3-70-g09d2 From 5b2c2f5a0ea3a43e0dee78059e34c7cb54136dcc Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:26:05 -0700 Subject: of: overlay: add missing of_node_get() in __of_attach_node_sysfs There is a matching of_node_put() in __of_detach_node_sysfs() Remove misleading comment from function header comment for of_detach_node(). This patch may result in memory leaks from code that directly calls the dynamic node add and delete functions directly instead of using changesets. This commit should result in powerpc systems that dynamically allocate a node, then later deallocate the node to have a memory leak when the node is deallocated. The next commit will fix the leak. Tested-by: Alan Tull Acked-by: Michael Ellerman (powerpc) Signed-off-by: Frank Rowand --- drivers/of/dynamic.c | 3 --- drivers/of/kobj.c | 4 +++- 2 files changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index 12c3f9a15e94..146681540487 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -272,9 +272,6 @@ void __of_detach_node(struct device_node *np) /** * of_detach_node() - "Unplug" a node from the device tree. - * - * The caller must hold a reference to the node. The memory associated with - * the node is not freed until its refcount goes to zero. */ int of_detach_node(struct device_node *np) { diff --git a/drivers/of/kobj.c b/drivers/of/kobj.c index 7a0a18980b98..c72eef988041 100644 --- a/drivers/of/kobj.c +++ b/drivers/of/kobj.c @@ -133,6 +133,9 @@ int __of_attach_node_sysfs(struct device_node *np) } if (!name) return -ENOMEM; + + of_node_get(np); + rc = kobject_add(&np->kobj, parent, "%s", name); kfree(name); if (rc) @@ -159,6 +162,5 @@ void __of_detach_node_sysfs(struct device_node *np) kobject_del(&np->kobj); } - /* finally remove the kobj_init ref */ of_node_put(np); } -- cgit v1.2.3-70-g09d2 From 6b4955ba7bc05e40c8c41071cc121bc26ca65277 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:28:08 -0700 Subject: of: overlay: use prop add changeset entry for property in new nodes The changeset entry 'update property' was used for new properties in an overlay instead of 'add property'. The decision of whether to use 'update property' was based on whether the property already exists in the subtree where the node is being spliced into. At the top level of creating a changeset describing the overlay, the target node is in the live devicetree, so checking whether the property exists in the target node returns the correct result. As soon as the changeset creation algorithm recurses into a new node, the target is no longer in the live devicetree, but is instead in the detached overlay tree, thus all properties are incorrectly found to already exist in the target. This fix will expose another devicetree bug that will be fixed in the following patch in the series. When this patch is applied the errors reported by the devictree unittest will change, and the unittest results will change from: ### dt-test ### end of unittest - 210 passed, 0 failed to ### dt-test ### end of unittest - 203 passed, 7 failed Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/overlay.c | 112 ++++++++++++++++++++++++++++++++++----------------- 1 file changed, 74 insertions(+), 38 deletions(-) (limited to 'drivers') diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 7613f7d680c7..6fd8e6145e10 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -23,6 +23,26 @@ #include "of_private.h" +/** + * struct target - info about current target node as recursing through overlay + * @np: node where current level of overlay will be applied + * @in_livetree: @np is a node in the live devicetree + * + * Used in the algorithm to create the portion of a changeset that describes + * an overlay fragment, which is a devicetree subtree. Initially @np is a node + * in the live devicetree where the overlay subtree is targeted to be grafted + * into. When recursing to the next level of the overlay subtree, the target + * also recurses to the next level of the live devicetree, as long as overlay + * subtree node also exists in the live devicetree. When a node in the overlay + * subtree does not exist at the same level in the live devicetree, target->np + * points to a newly allocated node, and all subsequent targets in the subtree + * will be newly allocated nodes. + */ +struct target { + struct device_node *np; + bool in_livetree; +}; + /** * struct fragment - info about fragment nodes in overlay expanded device tree * @target: target of the overlay operation @@ -72,8 +92,7 @@ static int devicetree_corrupt(void) } static int build_changeset_next_level(struct overlay_changeset *ovcs, - struct device_node *target_node, - const struct device_node *overlay_node); + struct target *target, const struct device_node *overlay_node); /* * of_resolve_phandles() finds the largest phandle in the live tree. @@ -257,14 +276,17 @@ err_free_target_path: /** * add_changeset_property() - add @overlay_prop to overlay changeset * @ovcs: overlay changeset - * @target_node: where to place @overlay_prop in live tree + * @target: where @overlay_prop will be placed * @overlay_prop: property to add or update, from overlay tree * @is_symbols_prop: 1 if @overlay_prop is from node "/__symbols__" * - * If @overlay_prop does not already exist in @target_node, add changeset entry - * to add @overlay_prop in @target_node, else add changeset entry to update + * If @overlay_prop does not already exist in live devicetree, add changeset + * entry to add @overlay_prop in @target, else add changeset entry to update * value of @overlay_prop. * + * @target may be either in the live devicetree or in a new subtree that + * is contained in the changeset. + * * Some special properties are not updated (no error returned). * * Update of property in symbols node is not allowed. @@ -273,20 +295,22 @@ err_free_target_path: * invalid @overlay. */ static int add_changeset_property(struct overlay_changeset *ovcs, - struct device_node *target_node, - struct property *overlay_prop, + struct target *target, struct property *overlay_prop, bool is_symbols_prop) { struct property *new_prop = NULL, *prop; int ret = 0; - prop = of_find_property(target_node, overlay_prop->name, NULL); - if (!of_prop_cmp(overlay_prop->name, "name") || !of_prop_cmp(overlay_prop->name, "phandle") || !of_prop_cmp(overlay_prop->name, "linux,phandle")) return 0; + if (target->in_livetree) + prop = of_find_property(target->np, overlay_prop->name, NULL); + else + prop = NULL; + if (is_symbols_prop) { if (prop) return -EINVAL; @@ -299,10 +323,10 @@ static int add_changeset_property(struct overlay_changeset *ovcs, return -ENOMEM; if (!prop) - ret = of_changeset_add_property(&ovcs->cset, target_node, + ret = of_changeset_add_property(&ovcs->cset, target->np, new_prop); else - ret = of_changeset_update_property(&ovcs->cset, target_node, + ret = of_changeset_update_property(&ovcs->cset, target->np, new_prop); if (ret) { @@ -315,14 +339,14 @@ static int add_changeset_property(struct overlay_changeset *ovcs, /** * add_changeset_node() - add @node (and children) to overlay changeset - * @ovcs: overlay changeset - * @target_node: where to place @node in live tree - * @node: node from within overlay device tree fragment + * @ovcs: overlay changeset + * @target: where @node will be placed in live tree or changeset + * @node: node from within overlay device tree fragment * - * If @node does not already exist in @target_node, add changeset entry - * to add @node in @target_node. + * If @node does not already exist in @target, add changeset entry + * to add @node in @target. * - * If @node already exists in @target_node, and the existing node has + * If @node already exists in @target, and the existing node has * a phandle, the overlay node is not allowed to have a phandle. * * If @node has child nodes, add the children recursively via @@ -355,15 +379,16 @@ static int add_changeset_property(struct overlay_changeset *ovcs, * invalid @overlay. */ static int add_changeset_node(struct overlay_changeset *ovcs, - struct device_node *target_node, struct device_node *node) + struct target *target, struct device_node *node) { const char *node_kbasename; struct device_node *tchild; + struct target target_child; int ret = 0; node_kbasename = kbasename(node->full_name); - for_each_child_of_node(target_node, tchild) + for_each_child_of_node(target->np, tchild) if (!of_node_cmp(node_kbasename, kbasename(tchild->full_name))) break; @@ -372,22 +397,28 @@ static int add_changeset_node(struct overlay_changeset *ovcs, if (!tchild) return -ENOMEM; - tchild->parent = target_node; + tchild->parent = target->np; of_node_set_flag(tchild, OF_OVERLAY); ret = of_changeset_attach_node(&ovcs->cset, tchild); if (ret) return ret; - ret = build_changeset_next_level(ovcs, tchild, node); + target_child.np = tchild; + target_child.in_livetree = false; + + ret = build_changeset_next_level(ovcs, &target_child, node); of_node_put(tchild); return ret; } - if (node->phandle && tchild->phandle) + if (node->phandle && tchild->phandle) { ret = -EINVAL; - else - ret = build_changeset_next_level(ovcs, tchild, node); + } else { + target_child.np = tchild; + target_child.in_livetree = target->in_livetree; + ret = build_changeset_next_level(ovcs, &target_child, node); + } of_node_put(tchild); return ret; @@ -396,7 +427,7 @@ static int add_changeset_node(struct overlay_changeset *ovcs, /** * build_changeset_next_level() - add level of overlay changeset * @ovcs: overlay changeset - * @target_node: where to place @overlay_node in live tree + * @target: where to place @overlay_node in live tree * @overlay_node: node from within an overlay device tree fragment * * Add the properties (if any) and nodes (if any) from @overlay_node to the @@ -409,27 +440,26 @@ static int add_changeset_node(struct overlay_changeset *ovcs, * invalid @overlay_node. */ static int build_changeset_next_level(struct overlay_changeset *ovcs, - struct device_node *target_node, - const struct device_node *overlay_node) + struct target *target, const struct device_node *overlay_node) { struct device_node *child; struct property *prop; int ret; for_each_property_of_node(overlay_node, prop) { - ret = add_changeset_property(ovcs, target_node, prop, 0); + ret = add_changeset_property(ovcs, target, prop, 0); if (ret) { pr_debug("Failed to apply prop @%pOF/%s, err=%d\n", - target_node, prop->name, ret); + target->np, prop->name, ret); return ret; } } for_each_child_of_node(overlay_node, child) { - ret = add_changeset_node(ovcs, target_node, child); + ret = add_changeset_node(ovcs, target, child); if (ret) { pr_debug("Failed to apply node @%pOF/%pOFn, err=%d\n", - target_node, child, ret); + target->np, child, ret); of_node_put(child); return ret; } @@ -442,17 +472,17 @@ static int build_changeset_next_level(struct overlay_changeset *ovcs, * Add the properties from __overlay__ node to the @ovcs->cset changeset. */ static int build_changeset_symbols_node(struct overlay_changeset *ovcs, - struct device_node *target_node, + struct target *target, const struct device_node *overlay_symbols_node) { struct property *prop; int ret; for_each_property_of_node(overlay_symbols_node, prop) { - ret = add_changeset_property(ovcs, target_node, prop, 1); + ret = add_changeset_property(ovcs, target, prop, 1); if (ret) { pr_debug("Failed to apply prop @%pOF/%s, err=%d\n", - target_node, prop->name, ret); + target->np, prop->name, ret); return ret; } } @@ -475,6 +505,7 @@ static int build_changeset_symbols_node(struct overlay_changeset *ovcs, static int build_changeset(struct overlay_changeset *ovcs) { struct fragment *fragment; + struct target target; int fragments_count, i, ret; /* @@ -489,7 +520,9 @@ static int build_changeset(struct overlay_changeset *ovcs) for (i = 0; i < fragments_count; i++) { fragment = &ovcs->fragments[i]; - ret = build_changeset_next_level(ovcs, fragment->target, + target.np = fragment->target; + target.in_livetree = true; + ret = build_changeset_next_level(ovcs, &target, fragment->overlay); if (ret) { pr_debug("apply failed '%pOF'\n", fragment->target); @@ -499,7 +532,10 @@ static int build_changeset(struct overlay_changeset *ovcs) if (ovcs->symbols_fragment) { fragment = &ovcs->fragments[ovcs->count - 1]; - ret = build_changeset_symbols_node(ovcs, fragment->target, + + target.np = fragment->target; + target.in_livetree = true; + ret = build_changeset_symbols_node(ovcs, &target, fragment->overlay); if (ret) { pr_debug("apply failed '%pOF'\n", fragment->target); @@ -517,7 +553,7 @@ static int build_changeset(struct overlay_changeset *ovcs) * 1) "target" property containing the phandle of the target * 2) "target-path" property containing the path of the target */ -static struct device_node *find_target_node(struct device_node *info_node) +static struct device_node *find_target(struct device_node *info_node) { struct device_node *node; const char *path; @@ -623,7 +659,7 @@ static int init_overlay_changeset(struct overlay_changeset *ovcs, fragment = &fragments[cnt]; fragment->overlay = overlay_node; - fragment->target = find_target_node(node); + fragment->target = find_target(node); if (!fragment->target) { of_node_put(fragment->overlay); ret = -EINVAL; -- cgit v1.2.3-70-g09d2 From 8814dc46bd9e347d4de55ec5bf8f16ea54470499 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:29:01 -0700 Subject: of: overlay: do not duplicate properties from overlay for new nodes When allocating a new node, add_changeset_node() was duplicating the properties from the respective node in the overlay instead of allocating a node with no properties. When this patch is applied the errors reported by the devictree unittest from patch "of: overlay: add tests to validate kfrees from overlay removal" will no longer occur. These error messages are of the form: "OF: ERROR: ..." and the unittest results will change from: ### dt-test ### end of unittest - 203 passed, 7 failed to ### dt-test ### end of unittest - 210 passed, 0 failed Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/overlay.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 6fd8e6145e10..9808aae4621a 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -393,7 +393,7 @@ static int add_changeset_node(struct overlay_changeset *ovcs, break; if (!tchild) { - tchild = __of_node_dup(node, node_kbasename); + tchild = __of_node_dup(NULL, node_kbasename); if (!tchild) return -ENOMEM; -- cgit v1.2.3-70-g09d2 From 81225ea682f45629a66309636482b7c9bc2dcec1 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:30:40 -0700 Subject: of: overlay: reorder fields in struct fragment Order the fields of struct fragment in the same order as struct of_overlay_notify_data. The order in struct fragment is not significant. If both structs are ordered the same then when examining the data in a debugger or dump the human involved does not have to remember which context they are examining. Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/overlay.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 9808aae4621a..15be3da34fef 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -49,8 +49,8 @@ struct target { * @overlay: pointer to the __overlay__ node */ struct fragment { - struct device_node *target; struct device_node *overlay; + struct device_node *target; }; /** -- cgit v1.2.3-70-g09d2 From 6f75118800acf77f8ad6afec61ca1b2349ade371 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:32:04 -0700 Subject: of: overlay: validate overlay properties #address-cells and #size-cells If overlay properties #address-cells or #size-cells are already in the live devicetree for any given node, then the values in the overlay must match the values in the live tree. If the properties are already in the live tree then there is no need to create a changeset entry to add them since they must have the same value. This reduces the memory used by the changeset and eliminates a possible memory leak. Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/overlay.c | 32 +++++++++++++++++++++++++++++--- include/linux/of.h | 6 ++++++ 2 files changed, 35 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 15be3da34fef..72bf00adb9c8 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -287,7 +287,12 @@ err_free_target_path: * @target may be either in the live devicetree or in a new subtree that * is contained in the changeset. * - * Some special properties are not updated (no error returned). + * Some special properties are not added or updated (no error returned): + * "name", "phandle", "linux,phandle". + * + * Properties "#address-cells" and "#size-cells" are not updated if they + * are already in the live tree, but if present in the live tree, the values + * in the overlay must match the values in the live tree. * * Update of property in symbols node is not allowed. * @@ -300,6 +305,7 @@ static int add_changeset_property(struct overlay_changeset *ovcs, { struct property *new_prop = NULL, *prop; int ret = 0; + bool check_for_non_overlay_node = false; if (!of_prop_cmp(overlay_prop->name, "name") || !of_prop_cmp(overlay_prop->name, "phandle") || @@ -322,12 +328,32 @@ static int add_changeset_property(struct overlay_changeset *ovcs, if (!new_prop) return -ENOMEM; - if (!prop) + if (!prop) { + check_for_non_overlay_node = true; ret = of_changeset_add_property(&ovcs->cset, target->np, new_prop); - else + } else if (!of_prop_cmp(prop->name, "#address-cells")) { + if (!of_prop_val_eq(prop, new_prop)) { + pr_err("ERROR: changing value of #address-cells is not allowed in %pOF\n", + target->np); + ret = -EINVAL; + } + } else if (!of_prop_cmp(prop->name, "#size-cells")) { + if (!of_prop_val_eq(prop, new_prop)) { + pr_err("ERROR: changing value of #size-cells is not allowed in %pOF\n", + target->np); + ret = -EINVAL; + } + } else { + check_for_non_overlay_node = true; ret = of_changeset_update_property(&ovcs->cset, target->np, new_prop); + } + + if (check_for_non_overlay_node && + !of_node_check_flag(target->np, OF_OVERLAY)) + pr_err("WARNING: memory leak will occur if overlay removed, property: %pOF/%s\n", + target->np, new_prop->name); if (ret) { kfree(new_prop->name); diff --git a/include/linux/of.h b/include/linux/of.h index 664cd5573ae2..18ac8921e90c 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -990,6 +990,12 @@ static inline int of_map_rid(struct device_node *np, u32 rid, #define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) #endif +static inline int of_prop_val_eq(struct property *p1, struct property *p2) +{ + return p1->length == p2->length && + !memcmp(p1->value, p2->value, (size_t)p1->length); +} + #if defined(CONFIG_OF) && defined(CONFIG_NUMA) extern int of_node_to_nid(struct device_node *np); #else -- cgit v1.2.3-70-g09d2 From a15e824ff2c18b2bb2464227009ae6aac4f07e10 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:33:35 -0700 Subject: of: overlay: make all pr_debug() and pr_err() messages unique Make overlay.c debug and error messages unique so that they can be unambiguously found by grep. Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/overlay.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'drivers') diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 72bf00adb9c8..c8f88b0836a3 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -507,7 +507,7 @@ static int build_changeset_symbols_node(struct overlay_changeset *ovcs, for_each_property_of_node(overlay_symbols_node, prop) { ret = add_changeset_property(ovcs, target, prop, 1); if (ret) { - pr_debug("Failed to apply prop @%pOF/%s, err=%d\n", + pr_debug("Failed to apply symbols prop @%pOF/%s, err=%d\n", target->np, prop->name, ret); return ret; } @@ -551,7 +551,8 @@ static int build_changeset(struct overlay_changeset *ovcs) ret = build_changeset_next_level(ovcs, &target, fragment->overlay); if (ret) { - pr_debug("apply failed '%pOF'\n", fragment->target); + pr_debug("fragment apply failed '%pOF'\n", + fragment->target); return ret; } } @@ -564,7 +565,8 @@ static int build_changeset(struct overlay_changeset *ovcs) ret = build_changeset_symbols_node(ovcs, &target, fragment->overlay); if (ret) { - pr_debug("apply failed '%pOF'\n", fragment->target); + pr_debug("symbols fragment apply failed '%pOF'\n", + fragment->target); return ret; } } @@ -873,7 +875,7 @@ static int of_overlay_apply(const void *fdt, struct device_node *tree, ret = __of_changeset_apply_notify(&ovcs->cset); if (ret) - pr_err("overlay changeset entry notify error %d\n", ret); + pr_err("overlay apply changeset entry notify error %d\n", ret); /* notify failure is not fatal, continue */ list_add_tail(&ovcs->ovcs_list, &ovcs_list); @@ -1132,7 +1134,7 @@ int of_overlay_remove(int *ovcs_id) ret = __of_changeset_revert_notify(&ovcs->cset); if (ret) - pr_err("overlay changeset entry notify error %d\n", ret); + pr_err("overlay remove changeset entry notify error %d\n", ret); /* notify failure is not fatal, continue */ *ovcs_id = 0; -- cgit v1.2.3-70-g09d2 From a68238a19c3b24e43fd2327d102bcea0ccceb7d0 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:34:33 -0700 Subject: of: overlay: test case of two fragments adding same node Multiple overlay fragments adding or deleting the same node is not supported. An attempt to do so results in an incorrect devicetree. The node name will be munged for the second add. After adding this patch, the unittest messages will show: Duplicate name in motor-1, renamed to "controller#1" OF: overlay: of_overlay_apply() err=0 ### dt-test ### of_overlay_fdt_apply() expected -22, ret=0, overlay_bad_add_dup_node ### dt-test ### FAIL of_unittest_overlay_high_level():2419 Adding overlay 'overlay_bad_add_dup_node' failed ... ### dt-test ### end of unittest - 210 passed, 1 failed The incorrect (munged) node name "controller#1" can be seen in the /proc filesystem: $ pwd /proc/device-tree/testcase-data-2/substation@100/motor-1 $ ls compatible controller controller#1 name phandle spin $ ls controller power_bus $ ls controller#1 power_bus_emergency Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/unittest-data/Makefile | 1 + .../of/unittest-data/overlay_bad_add_dup_node.dts | 28 ++++++++++++++++++++++ drivers/of/unittest.c | 5 ++++ 3 files changed, 34 insertions(+) create mode 100644 drivers/of/unittest-data/overlay_bad_add_dup_node.dts (limited to 'drivers') diff --git a/drivers/of/unittest-data/Makefile b/drivers/of/unittest-data/Makefile index 013d85e694c6..166dbdbfd1c5 100644 --- a/drivers/of/unittest-data/Makefile +++ b/drivers/of/unittest-data/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_OF_OVERLAY) += overlay.dtb.o \ overlay_12.dtb.o \ overlay_13.dtb.o \ overlay_15.dtb.o \ + overlay_bad_add_dup_node.dtb.o \ overlay_bad_phandle.dtb.o \ overlay_bad_symbol.dtb.o \ overlay_base.dtb.o diff --git a/drivers/of/unittest-data/overlay_bad_add_dup_node.dts b/drivers/of/unittest-data/overlay_bad_add_dup_node.dts new file mode 100644 index 000000000000..145dfc3b1024 --- /dev/null +++ b/drivers/of/unittest-data/overlay_bad_add_dup_node.dts @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/* + * &electric_1/motor-1 and &spin_ctrl_1 are the same node: + * /testcase-data-2/substation@100/motor-1 + * + * Thus the new node "controller" in each fragment will + * result in an attempt to add the same node twice. + * This will result in an error and the overlay apply + * will fail. + */ + +&electric_1 { + + motor-1 { + controller { + power_bus = < 0x1 0x2 >; + }; + }; +}; + +&spin_ctrl_1 { + controller { + power_bus_emergency = < 0x101 0x102 >; + }; +}; diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index 49ae2aa744d6..f82edf829f43 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -2161,6 +2161,7 @@ OVERLAY_INFO_EXTERN(overlay_11); OVERLAY_INFO_EXTERN(overlay_12); OVERLAY_INFO_EXTERN(overlay_13); OVERLAY_INFO_EXTERN(overlay_15); +OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node); OVERLAY_INFO_EXTERN(overlay_bad_phandle); OVERLAY_INFO_EXTERN(overlay_bad_symbol); @@ -2183,6 +2184,7 @@ static struct overlay_info overlays[] = { OVERLAY_INFO(overlay_12, 0), OVERLAY_INFO(overlay_13, 0), OVERLAY_INFO(overlay_15, 0), + OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL), OVERLAY_INFO(overlay_bad_phandle, -EINVAL), OVERLAY_INFO(overlay_bad_symbol, -EINVAL), {} @@ -2430,6 +2432,9 @@ static __init void of_unittest_overlay_high_level(void) unittest(overlay_data_apply("overlay", NULL), "Adding overlay 'overlay' failed\n"); + unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL), + "Adding overlay 'overlay_bad_add_dup_node' failed\n"); + unittest(overlay_data_apply("overlay_bad_phandle", NULL), "Adding overlay 'overlay_bad_phandle' failed\n"); -- cgit v1.2.3-70-g09d2 From c168263b5a10d2434ad5051be8dda47baa34a98e Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:35:14 -0700 Subject: of: overlay: check prevents multiple fragments add or delete same node Multiple overlay fragments adding or deleting the same node is not supported. Replace code comment of such, with check to detect the attempt and fail the overlay apply. Devicetree unittest where multiple fragments added the same node was added in the previous patch in the series. After applying this patch the unittest messages will no longer include: Duplicate name in motor-1, renamed to "controller#1" OF: overlay: of_overlay_apply() err=0 ### dt-test ### of_overlay_fdt_apply() expected -22, ret=0, overlay_bad_add_dup_node ### dt-test ### FAIL of_unittest_overlay_high_level():2419 Adding overlay 'overlay_bad_add_dup_node' failed ... ### dt-test ### end of unittest - 210 passed, 1 failed but will instead include: OF: overlay: ERROR: multiple overlay fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller ... ### dt-test ### end of unittest - 211 passed, 0 failed Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/overlay.c | 58 ++++++++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 49 insertions(+), 9 deletions(-) (limited to 'drivers') diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index c8f88b0836a3..8af8115bd36e 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -392,14 +392,6 @@ static int add_changeset_property(struct overlay_changeset *ovcs, * a live devicetree created from Open Firmware. * * NOTE_2: Multiple mods of created nodes not supported. - * If more than one fragment contains a node that does not already exist - * in the live tree, then for each fragment of_changeset_attach_node() - * will add a changeset entry to add the node. When the changeset is - * applied, __of_attach_node() will attach the node twice (once for - * each fragment). At this point the device tree will be corrupted. - * - * TODO: add integrity check to ensure that multiple fragments do not - * create the same node. * * Returns 0 on success, -ENOMEM if memory allocation failure, or -EINVAL if * invalid @overlay. @@ -516,6 +508,54 @@ static int build_changeset_symbols_node(struct overlay_changeset *ovcs, return 0; } +/** + * check_changeset_dup_add_node() - changeset validation: duplicate add node + * @ovcs: Overlay changeset + * + * Check changeset @ovcs->cset for multiple add node entries for the same + * node. + * + * Returns 0 on success, -ENOMEM if memory allocation failure, or -EINVAL if + * invalid overlay in @ovcs->fragments[]. + */ +static int check_changeset_dup_add_node(struct overlay_changeset *ovcs) +{ + struct of_changeset_entry *ce_1, *ce_2; + char *fn_1, *fn_2; + int name_match; + + list_for_each_entry(ce_1, &ovcs->cset.entries, node) { + + if (ce_1->action == OF_RECONFIG_ATTACH_NODE || + ce_1->action == OF_RECONFIG_DETACH_NODE) { + + ce_2 = ce_1; + list_for_each_entry_continue(ce_2, &ovcs->cset.entries, node) { + if (ce_2->action == OF_RECONFIG_ATTACH_NODE || + ce_2->action == OF_RECONFIG_DETACH_NODE) { + /* inexpensive name compare */ + if (!of_node_cmp(ce_1->np->full_name, + ce_2->np->full_name)) { + /* expensive full path name compare */ + fn_1 = kasprintf(GFP_KERNEL, "%pOF", ce_1->np); + fn_2 = kasprintf(GFP_KERNEL, "%pOF", ce_2->np); + name_match = !strcmp(fn_1, fn_2); + kfree(fn_1); + kfree(fn_2); + if (name_match) { + pr_err("ERROR: multiple overlay fragments add and/or delete node %pOF\n", + ce_1->np); + return -EINVAL; + } + } + } + } + } + } + + return 0; +} + /** * build_changeset() - populate overlay changeset in @ovcs from @ovcs->fragments * @ovcs: Overlay changeset @@ -571,7 +611,7 @@ static int build_changeset(struct overlay_changeset *ovcs) } } - return 0; + return check_changeset_dup_add_node(ovcs); } /* -- cgit v1.2.3-70-g09d2 From 2fe0e8769df9fed5098daea7db933bc414c329d7 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:36:18 -0700 Subject: of: overlay: check prevents multiple fragments touching same property Add test case of two fragments updating the same property. After adding the test case, the system hangs at end of boot, after after slub stack dumps from kfree() in crypto modprobe code. Multiple overlay fragments adding, modifying, or deleting the same property is not supported. Add check to detect the attempt and fail the overlay apply. Before this patch, the first fragment error would terminate processing. Allow fragment checking to proceed and report all of the fragment errors before terminating the overlay apply. This is not a hot path, thus not a performance issue (the error is not transient and requires fixing the overlay before attempting to apply it again). After applying this patch, the devicetree unittest messages will include: OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/rpm_avail ... ### dt-test ### end of unittest - 212 passed, 0 failed The check to detect two fragments updating the same property is folded into the patch that created the test case to maintain bisectability. Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/overlay.c | 118 ++++++++++++++------- drivers/of/unittest-data/Makefile | 1 + .../of/unittest-data/overlay_bad_add_dup_prop.dts | 24 +++++ drivers/of/unittest-data/overlay_base.dts | 1 + drivers/of/unittest.c | 5 + 5 files changed, 112 insertions(+), 37 deletions(-) create mode 100644 drivers/of/unittest-data/overlay_bad_add_dup_prop.dts (limited to 'drivers') diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 8af8115bd36e..184cc2c4a931 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -508,52 +508,96 @@ static int build_changeset_symbols_node(struct overlay_changeset *ovcs, return 0; } +static int find_dup_cset_node_entry(struct overlay_changeset *ovcs, + struct of_changeset_entry *ce_1) +{ + struct of_changeset_entry *ce_2; + char *fn_1, *fn_2; + int node_path_match; + + if (ce_1->action != OF_RECONFIG_ATTACH_NODE && + ce_1->action != OF_RECONFIG_DETACH_NODE) + return 0; + + ce_2 = ce_1; + list_for_each_entry_continue(ce_2, &ovcs->cset.entries, node) { + if ((ce_2->action != OF_RECONFIG_ATTACH_NODE && + ce_2->action != OF_RECONFIG_DETACH_NODE) || + of_node_cmp(ce_1->np->full_name, ce_2->np->full_name)) + continue; + + fn_1 = kasprintf(GFP_KERNEL, "%pOF", ce_1->np); + fn_2 = kasprintf(GFP_KERNEL, "%pOF", ce_2->np); + node_path_match = !strcmp(fn_1, fn_2); + kfree(fn_1); + kfree(fn_2); + if (node_path_match) { + pr_err("ERROR: multiple fragments add and/or delete node %pOF\n", + ce_1->np); + return -EINVAL; + } + } + + return 0; +} + +static int find_dup_cset_prop(struct overlay_changeset *ovcs, + struct of_changeset_entry *ce_1) +{ + struct of_changeset_entry *ce_2; + char *fn_1, *fn_2; + int node_path_match; + + if (ce_1->action != OF_RECONFIG_ADD_PROPERTY && + ce_1->action != OF_RECONFIG_REMOVE_PROPERTY && + ce_1->action != OF_RECONFIG_UPDATE_PROPERTY) + return 0; + + ce_2 = ce_1; + list_for_each_entry_continue(ce_2, &ovcs->cset.entries, node) { + if ((ce_2->action != OF_RECONFIG_ADD_PROPERTY && + ce_2->action != OF_RECONFIG_REMOVE_PROPERTY && + ce_2->action != OF_RECONFIG_UPDATE_PROPERTY) || + of_node_cmp(ce_1->np->full_name, ce_2->np->full_name)) + continue; + + fn_1 = kasprintf(GFP_KERNEL, "%pOF", ce_1->np); + fn_2 = kasprintf(GFP_KERNEL, "%pOF", ce_2->np); + node_path_match = !strcmp(fn_1, fn_2); + kfree(fn_1); + kfree(fn_2); + if (node_path_match && + !of_prop_cmp(ce_1->prop->name, ce_2->prop->name)) { + pr_err("ERROR: multiple fragments add, update, and/or delete property %pOF/%s\n", + ce_1->np, ce_1->prop->name); + return -EINVAL; + } + } + + return 0; +} + /** - * check_changeset_dup_add_node() - changeset validation: duplicate add node + * changeset_dup_entry_check() - check for duplicate entries * @ovcs: Overlay changeset * - * Check changeset @ovcs->cset for multiple add node entries for the same - * node. + * Check changeset @ovcs->cset for multiple {add or delete} node entries for + * the same node or duplicate {add, delete, or update} properties entries + * for the same property. * - * Returns 0 on success, -ENOMEM if memory allocation failure, or -EINVAL if - * invalid overlay in @ovcs->fragments[]. + * Returns 0 on success, or -EINVAL if duplicate changeset entry found. */ -static int check_changeset_dup_add_node(struct overlay_changeset *ovcs) +static int changeset_dup_entry_check(struct overlay_changeset *ovcs) { - struct of_changeset_entry *ce_1, *ce_2; - char *fn_1, *fn_2; - int name_match; + struct of_changeset_entry *ce_1; + int dup_entry = 0; list_for_each_entry(ce_1, &ovcs->cset.entries, node) { - - if (ce_1->action == OF_RECONFIG_ATTACH_NODE || - ce_1->action == OF_RECONFIG_DETACH_NODE) { - - ce_2 = ce_1; - list_for_each_entry_continue(ce_2, &ovcs->cset.entries, node) { - if (ce_2->action == OF_RECONFIG_ATTACH_NODE || - ce_2->action == OF_RECONFIG_DETACH_NODE) { - /* inexpensive name compare */ - if (!of_node_cmp(ce_1->np->full_name, - ce_2->np->full_name)) { - /* expensive full path name compare */ - fn_1 = kasprintf(GFP_KERNEL, "%pOF", ce_1->np); - fn_2 = kasprintf(GFP_KERNEL, "%pOF", ce_2->np); - name_match = !strcmp(fn_1, fn_2); - kfree(fn_1); - kfree(fn_2); - if (name_match) { - pr_err("ERROR: multiple overlay fragments add and/or delete node %pOF\n", - ce_1->np); - return -EINVAL; - } - } - } - } - } + dup_entry |= find_dup_cset_node_entry(ovcs, ce_1); + dup_entry |= find_dup_cset_prop(ovcs, ce_1); } - return 0; + return dup_entry ? -EINVAL : 0; } /** @@ -611,7 +655,7 @@ static int build_changeset(struct overlay_changeset *ovcs) } } - return check_changeset_dup_add_node(ovcs); + return changeset_dup_entry_check(ovcs); } /* diff --git a/drivers/of/unittest-data/Makefile b/drivers/of/unittest-data/Makefile index 166dbdbfd1c5..9b6807065827 100644 --- a/drivers/of/unittest-data/Makefile +++ b/drivers/of/unittest-data/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_OF_OVERLAY) += overlay.dtb.o \ overlay_13.dtb.o \ overlay_15.dtb.o \ overlay_bad_add_dup_node.dtb.o \ + overlay_bad_add_dup_prop.dtb.o \ overlay_bad_phandle.dtb.o \ overlay_bad_symbol.dtb.o \ overlay_base.dtb.o diff --git a/drivers/of/unittest-data/overlay_bad_add_dup_prop.dts b/drivers/of/unittest-data/overlay_bad_add_dup_prop.dts new file mode 100644 index 000000000000..c190da54f175 --- /dev/null +++ b/drivers/of/unittest-data/overlay_bad_add_dup_prop.dts @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/* + * &electric_1/motor-1 and &spin_ctrl_1 are the same node: + * /testcase-data-2/substation@100/motor-1 + * + * Thus the property "rpm_avail" in each fragment will + * result in an attempt to update the same property twice. + * This will result in an error and the overlay apply + * will fail. + */ + +&electric_1 { + + motor-1 { + rpm_avail = < 100 >; + }; +}; + +&spin_ctrl_1 { + rpm_avail = < 100 200 >; +}; diff --git a/drivers/of/unittest-data/overlay_base.dts b/drivers/of/unittest-data/overlay_base.dts index 820b79ca378a..99ab9d12d00b 100644 --- a/drivers/of/unittest-data/overlay_base.dts +++ b/drivers/of/unittest-data/overlay_base.dts @@ -30,6 +30,7 @@ spin_ctrl_1: motor-1 { compatible = "ot,ferris-wheel-motor"; spin = "clockwise"; + rpm_avail = < 50 >; }; spin_ctrl_2: motor-8 { diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index f82edf829f43..f0139d1e8b63 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -2162,6 +2162,7 @@ OVERLAY_INFO_EXTERN(overlay_12); OVERLAY_INFO_EXTERN(overlay_13); OVERLAY_INFO_EXTERN(overlay_15); OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node); +OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop); OVERLAY_INFO_EXTERN(overlay_bad_phandle); OVERLAY_INFO_EXTERN(overlay_bad_symbol); @@ -2185,6 +2186,7 @@ static struct overlay_info overlays[] = { OVERLAY_INFO(overlay_13, 0), OVERLAY_INFO(overlay_15, 0), OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL), + OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL), OVERLAY_INFO(overlay_bad_phandle, -EINVAL), OVERLAY_INFO(overlay_bad_symbol, -EINVAL), {} @@ -2435,6 +2437,9 @@ static __init void of_unittest_overlay_high_level(void) unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL), "Adding overlay 'overlay_bad_add_dup_node' failed\n"); + unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL), + "Adding overlay 'overlay_bad_add_dup_prop' failed\n"); + unittest(overlay_data_apply("overlay_bad_phandle", NULL), "Adding overlay 'overlay_bad_phandle' failed\n"); -- cgit v1.2.3-70-g09d2 From 8c329655c14f9596bb0534492ea740994ded440c Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:39:24 -0700 Subject: of: unittest: remove unused of_unittest_apply_overlay() argument Argument unittest_nr is not used in of_unittest_apply_overlay(), remove it. Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/unittest.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index f0139d1e8b63..14838b21ec6a 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -1433,8 +1433,7 @@ static void of_unittest_destroy_tracked_overlays(void) } while (defers > 0); } -static int __init of_unittest_apply_overlay(int overlay_nr, int unittest_nr, - int *overlay_id) +static int __init of_unittest_apply_overlay(int overlay_nr, int *overlay_id) { const char *overlay_name; @@ -1467,7 +1466,7 @@ static int __init of_unittest_apply_overlay_check(int overlay_nr, } ovcs_id = 0; - ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ovcs_id); + ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); if (ret != 0) { /* of_unittest_apply_overlay already called unittest() */ return ret; @@ -1503,7 +1502,7 @@ static int __init of_unittest_apply_revert_overlay_check(int overlay_nr, /* apply the overlay */ ovcs_id = 0; - ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ovcs_id); + ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); if (ret != 0) { /* of_unittest_apply_overlay already called unittest() */ return ret; -- cgit v1.2.3-70-g09d2 From f96278810150fc39085d1872e5b39ea06366d03e Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Fri, 12 Oct 2018 19:21:16 -0700 Subject: of: overlay: set node fields from properties when add new overlay node Overlay nodes added by add_changeset_node() do not have the node fields name, phandle, and type set. The node passed to __of_attach_node() when the add node changeset entry is processed does not contain any properties. The node's properties are located in add property changeset entries that will be processed after the add node changeset is applied. Set the node's fields in the node contained in the add node changeset entry and do not set them to incorrect values in add_changeset_node(). A visible symptom that is fixed by this patch is the names of nodes added by overlays that have an entry in /sys/bus/platform/drivers/*/ will contain the unit-address but the node-name will be , for example, "fc4ab000.". After applying the patch the name, in this example, for node restart@fc4ab000 is "fc4ab000.restart". Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/dynamic.c | 27 ++++++++++++++++++--------- drivers/of/overlay.c | 29 ++++++++++++++++++++++++----- 2 files changed, 42 insertions(+), 14 deletions(-) (limited to 'drivers') diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index 146681540487..b4e5b90cb314 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -205,15 +205,24 @@ static void __of_attach_node(struct device_node *np) const __be32 *phandle; int sz; - np->name = __of_get_property(np, "name", NULL) ? : ""; - np->type = __of_get_property(np, "device_type", NULL) ? : ""; - - phandle = __of_get_property(np, "phandle", &sz); - if (!phandle) - phandle = __of_get_property(np, "linux,phandle", &sz); - if (IS_ENABLED(CONFIG_PPC_PSERIES) && !phandle) - phandle = __of_get_property(np, "ibm,phandle", &sz); - np->phandle = (phandle && (sz >= 4)) ? be32_to_cpup(phandle) : 0; + if (!of_node_check_flag(np, OF_OVERLAY)) { + np->name = __of_get_property(np, "name", NULL); + np->type = __of_get_property(np, "device_type", NULL); + if (!np->name) + np->name = ""; + if (!np->type) + np->type = ""; + + phandle = __of_get_property(np, "phandle", &sz); + if (!phandle) + phandle = __of_get_property(np, "linux,phandle", &sz); + if (IS_ENABLED(CONFIG_PPC_PSERIES) && !phandle) + phandle = __of_get_property(np, "ibm,phandle", &sz); + if (phandle && (sz >= 4)) + np->phandle = be32_to_cpup(phandle); + else + np->phandle = 0; + } np->child = NULL; np->sibling = np->parent->child; diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 184cc2c4a931..2b5ac43a5690 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -307,10 +307,11 @@ static int add_changeset_property(struct overlay_changeset *ovcs, int ret = 0; bool check_for_non_overlay_node = false; - if (!of_prop_cmp(overlay_prop->name, "name") || - !of_prop_cmp(overlay_prop->name, "phandle") || - !of_prop_cmp(overlay_prop->name, "linux,phandle")) - return 0; + if (target->in_livetree) + if (!of_prop_cmp(overlay_prop->name, "name") || + !of_prop_cmp(overlay_prop->name, "phandle") || + !of_prop_cmp(overlay_prop->name, "linux,phandle")) + return 0; if (target->in_livetree) prop = of_find_property(target->np, overlay_prop->name, NULL); @@ -330,6 +331,10 @@ static int add_changeset_property(struct overlay_changeset *ovcs, if (!prop) { check_for_non_overlay_node = true; + if (!target->in_livetree) { + new_prop->next = target->np->deadprops; + target->np->deadprops = new_prop; + } ret = of_changeset_add_property(&ovcs->cset, target->np, new_prop); } else if (!of_prop_cmp(prop->name, "#address-cells")) { @@ -400,9 +405,10 @@ static int add_changeset_node(struct overlay_changeset *ovcs, struct target *target, struct device_node *node) { const char *node_kbasename; + const __be32 *phandle; struct device_node *tchild; struct target target_child; - int ret = 0; + int ret = 0, size; node_kbasename = kbasename(node->full_name); @@ -416,6 +422,19 @@ static int add_changeset_node(struct overlay_changeset *ovcs, return -ENOMEM; tchild->parent = target->np; + tchild->name = __of_get_property(node, "name", NULL); + tchild->type = __of_get_property(node, "device_type", NULL); + + if (!tchild->name) + tchild->name = ""; + if (!tchild->type) + tchild->type = ""; + + /* ignore obsolete "linux,phandle" */ + phandle = __of_get_property(node, "phandle", &size); + if (phandle && (size == 4)) + tchild->phandle = be32_to_cpup(phandle); + of_node_set_flag(tchild, OF_OVERLAY); ret = of_changeset_attach_node(&ovcs->cset, tchild); -- cgit v1.2.3-70-g09d2 From 5babefb7f7ab1f23861336d511cc666fa45ede82 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Fri, 12 Oct 2018 19:38:26 -0700 Subject: of: unittest: allow base devicetree to have symbol metadata The overlay metadata nodes in the FDT created from testcases.dts are not handled properly. The __fixups__ and __local_fixups__ node were added to the live devicetree, but should not be. Only the first property in the /__symbols__ node was added to the live devicetree if the live devicetree already contained a /__symbols node. All of the node's properties must be added. Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/unittest.c | 43 +++++++++++++++++++++++++++++++++++-------- 1 file changed, 35 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index 14838b21ec6a..d625a91a7f60 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -1071,20 +1071,44 @@ static void __init of_unittest_platform_populate(void) * of np into dup node (present in live tree) and * updates parent of children of np to dup. * - * @np: node already present in live tree + * @np: node whose properties are being added to the live tree * @dup: node present in live tree to be updated */ static void update_node_properties(struct device_node *np, struct device_node *dup) { struct property *prop; + struct property *save_next; struct device_node *child; - - for_each_property_of_node(np, prop) - of_add_property(dup, prop); + int ret; for_each_child_of_node(np, child) child->parent = dup; + + /* + * "unittest internal error: unable to add testdata property" + * + * If this message reports a property in node '/__symbols__' then + * the respective unittest overlay contains a label that has the + * same name as a label in the live devicetree. The label will + * be in the live devicetree only if the devicetree source was + * compiled with the '-@' option. If you encounter this error, + * please consider renaming __all__ of the labels in the unittest + * overlay dts files with an odd prefix that is unlikely to be + * used in a real devicetree. + */ + + /* + * open code for_each_property_of_node() because of_add_property() + * sets prop->next to NULL + */ + for (prop = np->properties; prop != NULL; prop = save_next) { + save_next = prop->next; + ret = of_add_property(dup, prop); + if (ret) + pr_err("unittest internal error: unable to add testdata property %pOF/%s", + np, prop->name); + } } /** @@ -1093,18 +1117,23 @@ static void update_node_properties(struct device_node *np, * * @np: Node to attach to live tree */ -static int attach_node_and_children(struct device_node *np) +static void attach_node_and_children(struct device_node *np) { struct device_node *next, *dup, *child; unsigned long flags; const char *full_name; full_name = kasprintf(GFP_KERNEL, "%pOF", np); + + if (!strcmp(full_name, "/__local_fixups__") || + !strcmp(full_name, "/__fixups__")) + return; + dup = of_find_node_by_path(full_name); kfree(full_name); if (dup) { update_node_properties(np, dup); - return 0; + return; } child = np->child; @@ -1125,8 +1154,6 @@ static int attach_node_and_children(struct device_node *np) attach_node_and_children(child); child = next; } - - return 0; } /** -- cgit v1.2.3-70-g09d2 From 160b1d4e4127f0ef5d9ac281b6fa6ef1fb78c45f Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:41:03 -0700 Subject: of: unittest: find overlays[] entry by name instead of index One accessor of overlays[] was using a hard coded index value to find the correct array entry instead of searching for the entry containing the correct name. Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/unittest.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index d625a91a7f60..fe01c5869b0f 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -2192,7 +2192,7 @@ OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop); OVERLAY_INFO_EXTERN(overlay_bad_phandle); OVERLAY_INFO_EXTERN(overlay_bad_symbol); -/* order of entries is hard-coded into users of overlays[] */ +/* entries found by name */ static struct overlay_info overlays[] = { OVERLAY_INFO(overlay_base, -9999), OVERLAY_INFO(overlay, 0), @@ -2215,7 +2215,8 @@ static struct overlay_info overlays[] = { OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL), OVERLAY_INFO(overlay_bad_phandle, -EINVAL), OVERLAY_INFO(overlay_bad_symbol, -EINVAL), - {} + /* end marker */ + {.dtb_begin = NULL, .dtb_end = NULL, .expected_result = 0, .name = NULL} }; static struct device_node *overlay_base_root; @@ -2245,6 +2246,19 @@ void __init unittest_unflatten_overlay_base(void) u32 data_size; void *new_fdt; u32 size; + int found = 0; + const char *overlay_name = "overlay_base"; + + for (info = overlays; info && info->name; info++) { + if (!strcmp(overlay_name, info->name)) { + found = 1; + break; + } + } + if (!found) { + pr_err("no overlay data for %s\n", overlay_name); + return; + } info = &overlays[0]; @@ -2292,11 +2306,10 @@ static int __init overlay_data_apply(const char *overlay_name, int *overlay_id) { struct overlay_info *info; int found = 0; - int k; int ret; u32 size; - for (k = 0, info = overlays; info && info->name; info++, k++) { + for (info = overlays; info && info->name; info++) { if (!strcmp(overlay_name, info->name)) { found = 1; break; -- cgit v1.2.3-70-g09d2 From eeb07c573ec307c53fe2f6ac6d8d11c261f64006 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Thu, 4 Oct 2018 20:40:21 -0700 Subject: of: unittest: initialize args before calling of_*parse_*() Callers of of_irq_parse_one() blindly use the pointer args.np without checking whether of_irq_parse_one() had an error and thus did not set the value of args.np. Initialize args to zero so that using the format "%pOF" to show the value of args.np will show "(null)" when of_irq_parse_one() has an error. This prevents the dereference of a random value. Make the same fix for callers of of_parse_phandle_with_args() and of_parse_phandle_with_args_map(). Reported-by: Guenter Roeck Tested-by: Alan Tull Signed-off-by: Frank Rowand --- drivers/of/unittest.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index fe01c5869b0f..9a10a48eb6a1 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -379,6 +379,7 @@ static void __init of_unittest_parse_phandle_with_args(void) for (i = 0; i < 8; i++) { bool passed = true; + memset(&args, 0, sizeof(args)); rc = of_parse_phandle_with_args(np, "phandle-list", "#phandle-cells", i, &args); @@ -432,6 +433,7 @@ static void __init of_unittest_parse_phandle_with_args(void) } /* Check for missing list property */ + memset(&args, 0, sizeof(args)); rc = of_parse_phandle_with_args(np, "phandle-list-missing", "#phandle-cells", 0, &args); unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); @@ -440,6 +442,7 @@ static void __init of_unittest_parse_phandle_with_args(void) unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); /* Check for missing cells property */ + memset(&args, 0, sizeof(args)); rc = of_parse_phandle_with_args(np, "phandle-list", "#phandle-cells-missing", 0, &args); unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); @@ -448,6 +451,7 @@ static void __init of_unittest_parse_phandle_with_args(void) unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); /* Check for bad phandle in list */ + memset(&args, 0, sizeof(args)); rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", "#phandle-cells", 0, &args); unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); @@ -456,6 +460,7 @@ static void __init of_unittest_parse_phandle_with_args(void) unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); /* Check for incorrectly formed argument list */ + memset(&args, 0, sizeof(args)); rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", "#phandle-cells", 1, &args); unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); @@ -506,6 +511,7 @@ static void __init of_unittest_parse_phandle_with_args_map(void) for (i = 0; i < 8; i++) { bool passed = true; + memset(&args, 0, sizeof(args)); rc = of_parse_phandle_with_args_map(np, "phandle-list", "phandle", i, &args); @@ -563,21 +569,25 @@ static void __init of_unittest_parse_phandle_with_args_map(void) } /* Check for missing list property */ + memset(&args, 0, sizeof(args)); rc = of_parse_phandle_with_args_map(np, "phandle-list-missing", "phandle", 0, &args); unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); /* Check for missing cells,map,mask property */ + memset(&args, 0, sizeof(args)); rc = of_parse_phandle_with_args_map(np, "phandle-list", "phandle-missing", 0, &args); unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); /* Check for bad phandle in list */ + memset(&args, 0, sizeof(args)); rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle", "phandle", 0, &args); unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); /* Check for incorrectly formed argument list */ + memset(&args, 0, sizeof(args)); rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args", "phandle", 1, &args); unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); @@ -787,7 +797,7 @@ static void __init of_unittest_parse_interrupts(void) for (i = 0; i < 4; i++) { bool passed = true; - args.args_count = 0; + memset(&args, 0, sizeof(args)); rc = of_irq_parse_one(np, i, &args); passed &= !rc; @@ -808,7 +818,7 @@ static void __init of_unittest_parse_interrupts(void) for (i = 0; i < 4; i++) { bool passed = true; - args.args_count = 0; + memset(&args, 0, sizeof(args)); rc = of_irq_parse_one(np, i, &args); /* Test the values from tests-phandle.dtsi */ @@ -864,6 +874,7 @@ static void __init of_unittest_parse_interrupts_extended(void) for (i = 0; i < 7; i++) { bool passed = true; + memset(&args, 0, sizeof(args)); rc = of_irq_parse_one(np, i, &args); /* Test the values from tests-phandle.dtsi */ -- cgit v1.2.3-70-g09d2 From 1ae367a2451e0b249074461d2d8ac76d8e929a53 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Tue, 6 Nov 2018 18:07:37 -0600 Subject: of/pdt: Remove unused of_pdt_build_more function ptr There are no users of of_pdt_build_more since 2012, so remove it. Cc: Frank Rowand Signed-off-by: Rob Herring --- drivers/of/pdt.c | 5 ----- include/linux/of_pdt.h | 2 -- 2 files changed, 7 deletions(-) (limited to 'drivers') diff --git a/drivers/of/pdt.c b/drivers/of/pdt.c index 013e65de074a..4fc0fd96ed04 100644 --- a/drivers/of/pdt.c +++ b/drivers/of/pdt.c @@ -21,8 +21,6 @@ static struct of_pdt_ops *of_pdt_prom_ops __initdata; -void __initdata (*of_pdt_build_more)(struct device_node *dp); - #if defined(CONFIG_SPARC) unsigned int of_pdt_unique_id __initdata; @@ -208,9 +206,6 @@ static struct device_node * __init of_pdt_build_tree(struct device_node *parent, dp->child = of_pdt_build_tree(dp, of_pdt_prom_ops->getchild(node)); - if (of_pdt_build_more) - of_pdt_build_more(dp); - node = of_pdt_prom_ops->getsibling(node); } diff --git a/include/linux/of_pdt.h b/include/linux/of_pdt.h index d0b183ab65c6..89e4eb076a01 100644 --- a/include/linux/of_pdt.h +++ b/include/linux/of_pdt.h @@ -35,6 +35,4 @@ extern void *prom_early_alloc(unsigned long size); /* for building the device tree */ extern void of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops); -extern void (*of_pdt_build_more)(struct device_node *dp); - #endif /* _LINUX_OF_PDT_H */ -- cgit v1.2.3-70-g09d2 From fe7db7570379dafec67430bb843d2e78df89e7f1 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Mon, 5 Nov 2018 14:54:28 -0800 Subject: of/fdt: Populate phys_initrd_start/phys_initrd_size from FDT Now that we have central and global variables holding the physical address and size of the initrd, we can have early_init_dt_check_for_initrd() populate phys_initrd_start/phys_initrd_size for us. This allows us to remove a chunk of code from arch/arm/mm/init.c introduced with commit 65939301acdb ("arm: set initrd_start/initrd_end for fdt scan"). Signed-off-by: Florian Fainelli Reviewed-by: Mike Rapoport Signed-off-by: Rob Herring --- arch/arm/mm/init.c | 6 ------ drivers/of/fdt.c | 2 ++ 2 files changed, 2 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 438625764ccd..a3b6f1f1cbaf 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -235,12 +235,6 @@ static void __init arm_initrd_init(void) phys_addr_t start; unsigned long size; - /* FDT scan will populate initrd_start */ - if (initrd_start && !phys_initrd_size) { - phys_initrd_start = __virt_to_phys(initrd_start); - phys_initrd_size = initrd_end - initrd_start; - } - initrd_start = initrd_end = 0; if (!phys_initrd_size) diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index bb532aae0d92..88760a0983a7 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -924,6 +924,8 @@ static void __init early_init_dt_check_for_initrd(unsigned long node) end = of_read_number(prop, len/4); __early_init_dt_declare_initrd(start, end); + phys_initrd_start = start; + phys_initrd_size = end - start; pr_debug("initrd_start=0x%llx initrd_end=0x%llx\n", (unsigned long long)start, (unsigned long long)end); -- cgit v1.2.3-70-g09d2 From cdbc848b03414c75b7badccd8ada29deba7ec6e4 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Mon, 5 Nov 2018 14:54:30 -0800 Subject: of/fdt: Remove custom __early_init_dt_declare_initrd() implementation Now that ARM64 uses phys_initrd_start/phys_initrd_size, we can get rid of its custom __early_init_dt_declare_initrd() which causes a fair amount of objects rebuild when changing CONFIG_BLK_DEV_INITRD. In order to make sure ARM64 does not produce a BUG() when VM debugging is turned on though, we must avoid early calls to __va() which is what __early_init_dt_declare_initrd() does and wrap this around to avoid running that code on ARM64. Signed-off-by: Florian Fainelli Reviewed-by: Mike Rapoport Signed-off-by: Rob Herring --- arch/arm64/include/asm/memory.h | 8 -------- drivers/of/fdt.c | 15 ++++++++++----- 2 files changed, 10 insertions(+), 13 deletions(-) (limited to 'drivers') diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index b96442960aea..dc3ca21ba240 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -168,14 +168,6 @@ #define IOREMAP_MAX_ORDER (PMD_SHIFT) #endif -#ifdef CONFIG_BLK_DEV_INITRD -#define __early_init_dt_declare_initrd(__start, __end) \ - do { \ - initrd_start = (__start); \ - initrd_end = (__end); \ - } while (0) -#endif - #ifndef __ASSEMBLY__ #include diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 88760a0983a7..cd72a41fcab2 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -891,15 +891,20 @@ const void * __init of_flat_dt_match_machine(const void *default_match, } #ifdef CONFIG_BLK_DEV_INITRD -#ifndef __early_init_dt_declare_initrd static void __early_init_dt_declare_initrd(unsigned long start, unsigned long end) { - initrd_start = (unsigned long)__va(start); - initrd_end = (unsigned long)__va(end); - initrd_below_start_ok = 1; + /* ARM64 would cause a BUG to occur here when CONFIG_DEBUG_VM is + * enabled since __va() is called too early. ARM64 does make use + * of phys_initrd_start/phys_initrd_size so we can skip this + * conversion. + */ + if (!IS_ENABLED(CONFIG_ARM64)) { + initrd_start = (unsigned long)__va(start); + initrd_end = (unsigned long)__va(end); + initrd_below_start_ok = 1; + } } -#endif /** * early_init_dt_check_for_initrd - Decode initrd location from flat tree -- cgit v1.2.3-70-g09d2 From 2ef790dc443a25cc3818b0fa34cb9f4ed0ec5ec1 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Mon, 27 Aug 2018 19:56:15 -0500 Subject: irqchip: Convert to using %pOFn instead of device_node.name In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Acked-by: Thomas Gleixner Cc: Jason Cooper Cc: Marc Zyngier Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Rob Herring --- drivers/irqchip/irq-gic-v3.c | 4 ++-- drivers/irqchip/irq-mscc-ocelot.c | 6 +++--- drivers/irqchip/irq-orion.c | 22 +++++++++++----------- drivers/irqchip/irq-stm32-exti.c | 6 +++--- drivers/irqchip/irq-tango.c | 10 +++++----- drivers/irqchip/irq-tb10x.c | 18 +++++++++--------- 6 files changed, 33 insertions(+), 33 deletions(-) (limited to 'drivers') diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 8f87f40c9460..29e9d47be97d 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -1184,8 +1184,8 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node) part->partition_id = of_node_to_fwnode(child_part); - pr_info("GIC: PPI partition %s[%d] { ", - child_part->name, part_idx); + pr_info("GIC: PPI partition %pOFn[%d] { ", + child_part, part_idx); n = of_property_count_elems_of_size(child_part, "affinity", sizeof(u32)); diff --git a/drivers/irqchip/irq-mscc-ocelot.c b/drivers/irqchip/irq-mscc-ocelot.c index b63e40c00a02..88143c0b700c 100644 --- a/drivers/irqchip/irq-mscc-ocelot.c +++ b/drivers/irqchip/irq-mscc-ocelot.c @@ -72,7 +72,7 @@ static int __init ocelot_irq_init(struct device_node *node, domain = irq_domain_add_linear(node, OCELOT_NR_IRQ, &irq_generic_chip_ops, NULL); if (!domain) { - pr_err("%s: unable to add irq domain\n", node->name); + pr_err("%pOFn: unable to add irq domain\n", node); return -ENOMEM; } @@ -80,14 +80,14 @@ static int __init ocelot_irq_init(struct device_node *node, "icpu", handle_level_irq, 0, 0, 0); if (ret) { - pr_err("%s: unable to alloc irq domain gc\n", node->name); + pr_err("%pOFn: unable to alloc irq domain gc\n", node); goto err_domain_remove; } gc = irq_get_domain_generic_chip(domain, 0); gc->reg_base = of_iomap(node, 0); if (!gc->reg_base) { - pr_err("%s: unable to map resource\n", node->name); + pr_err("%pOFn: unable to map resource\n", node); ret = -ENOMEM; goto err_gc_free; } diff --git a/drivers/irqchip/irq-orion.c b/drivers/irqchip/irq-orion.c index be4c5a8c9659..c4b5ffb61954 100644 --- a/drivers/irqchip/irq-orion.c +++ b/drivers/irqchip/irq-orion.c @@ -64,14 +64,14 @@ static int __init orion_irq_init(struct device_node *np, num_chips * ORION_IRQS_PER_CHIP, &irq_generic_chip_ops, NULL); if (!orion_irq_domain) - panic("%s: unable to add irq domain\n", np->name); + panic("%pOFn: unable to add irq domain\n", np); ret = irq_alloc_domain_generic_chips(orion_irq_domain, - ORION_IRQS_PER_CHIP, 1, np->name, + ORION_IRQS_PER_CHIP, 1, np->full_name, handle_level_irq, clr, 0, IRQ_GC_INIT_MASK_CACHE); if (ret) - panic("%s: unable to alloc irq domain gc\n", np->name); + panic("%pOFn: unable to alloc irq domain gc\n", np); for (n = 0, base = 0; n < num_chips; n++, base += ORION_IRQS_PER_CHIP) { struct irq_chip_generic *gc = @@ -80,12 +80,12 @@ static int __init orion_irq_init(struct device_node *np, of_address_to_resource(np, n, &r); if (!request_mem_region(r.start, resource_size(&r), np->name)) - panic("%s: unable to request mem region %d", - np->name, n); + panic("%pOFn: unable to request mem region %d", + np, n); gc->reg_base = ioremap(r.start, resource_size(&r)); if (!gc->reg_base) - panic("%s: unable to map resource %d", np->name, n); + panic("%pOFn: unable to map resource %d", np, n); gc->chip_types[0].regs.mask = ORION_IRQ_MASK; gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit; @@ -150,20 +150,20 @@ static int __init orion_bridge_irq_init(struct device_node *np, domain = irq_domain_add_linear(np, nrirqs, &irq_generic_chip_ops, NULL); if (!domain) { - pr_err("%s: unable to add irq domain\n", np->name); + pr_err("%pOFn: unable to add irq domain\n", np); return -ENOMEM; } ret = irq_alloc_domain_generic_chips(domain, nrirqs, 1, np->name, handle_edge_irq, clr, 0, IRQ_GC_INIT_MASK_CACHE); if (ret) { - pr_err("%s: unable to alloc irq domain gc\n", np->name); + pr_err("%pOFn: unable to alloc irq domain gc\n", np); return ret; } ret = of_address_to_resource(np, 0, &r); if (ret) { - pr_err("%s: unable to get resource\n", np->name); + pr_err("%pOFn: unable to get resource\n", np); return ret; } @@ -175,14 +175,14 @@ static int __init orion_bridge_irq_init(struct device_node *np, /* Map the parent interrupt for the chained handler */ irq = irq_of_parse_and_map(np, 0); if (irq <= 0) { - pr_err("%s: unable to parse irq\n", np->name); + pr_err("%pOFn: unable to parse irq\n", np); return -EINVAL; } gc = irq_get_domain_generic_chip(domain, 0); gc->reg_base = ioremap(r.start, resource_size(&r)); if (!gc->reg_base) { - pr_err("%s: unable to map resource\n", np->name); + pr_err("%pOFn: unable to map resource\n", np); return -ENOMEM; } diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c index 0a2088e12d96..363385750fa7 100644 --- a/drivers/irqchip/irq-stm32-exti.c +++ b/drivers/irqchip/irq-stm32-exti.c @@ -678,8 +678,8 @@ static int __init stm32_exti_init(const struct stm32_exti_drv_data *drv_data, domain = irq_domain_add_linear(node, drv_data->bank_nr * IRQS_PER_BANK, &irq_exti_domain_ops, NULL); if (!domain) { - pr_err("%s: Could not register interrupt domain.\n", - node->name); + pr_err("%pOFn: Could not register interrupt domain.\n", + node); ret = -ENOMEM; goto out_unmap; } @@ -768,7 +768,7 @@ __init stm32_exti_hierarchy_init(const struct stm32_exti_drv_data *drv_data, host_data); if (!domain) { - pr_err("%s: Could not register exti domain.\n", node->name); + pr_err("%pOFn: Could not register exti domain.\n", node); ret = -ENOMEM; goto out_unmap; } diff --git a/drivers/irqchip/irq-tango.c b/drivers/irqchip/irq-tango.c index 580e2d72b9ba..ae28d8648679 100644 --- a/drivers/irqchip/irq-tango.c +++ b/drivers/irqchip/irq-tango.c @@ -184,11 +184,11 @@ static int __init tangox_irq_init(void __iomem *base, struct resource *baseres, irq = irq_of_parse_and_map(node, 0); if (!irq) - panic("%s: failed to get IRQ", node->name); + panic("%pOFn: failed to get IRQ", node); err = of_address_to_resource(node, 0, &res); if (err) - panic("%s: failed to get address", node->name); + panic("%pOFn: failed to get address", node); chip = kzalloc(sizeof(*chip), GFP_KERNEL); chip->ctl = res.start - baseres->start; @@ -196,12 +196,12 @@ static int __init tangox_irq_init(void __iomem *base, struct resource *baseres, dom = irq_domain_add_linear(node, 64, &irq_generic_chip_ops, chip); if (!dom) - panic("%s: failed to create irqdomain", node->name); + panic("%pOFn: failed to create irqdomain", node); err = irq_alloc_domain_generic_chips(dom, 32, 2, node->name, handle_level_irq, 0, 0, 0); if (err) - panic("%s: failed to allocate irqchip", node->name); + panic("%pOFn: failed to allocate irqchip", node); tangox_irq_domain_init(dom); @@ -219,7 +219,7 @@ static int __init tangox_of_irq_init(struct device_node *node, base = of_iomap(node, 0); if (!base) - panic("%s: of_iomap failed", node->name); + panic("%pOFn: of_iomap failed", node); of_address_to_resource(node, 0, &res); diff --git a/drivers/irqchip/irq-tb10x.c b/drivers/irqchip/irq-tb10x.c index 848d782a2a3b..7e6708099a7b 100644 --- a/drivers/irqchip/irq-tb10x.c +++ b/drivers/irqchip/irq-tb10x.c @@ -115,21 +115,21 @@ static int __init of_tb10x_init_irq(struct device_node *ictl, void __iomem *reg_base; if (of_address_to_resource(ictl, 0, &mem)) { - pr_err("%s: No registers declared in DeviceTree.\n", - ictl->name); + pr_err("%pOFn: No registers declared in DeviceTree.\n", + ictl); return -EINVAL; } if (!request_mem_region(mem.start, resource_size(&mem), - ictl->name)) { - pr_err("%s: Request mem region failed.\n", ictl->name); + ictl->full_name)) { + pr_err("%pOFn: Request mem region failed.\n", ictl); return -EBUSY; } reg_base = ioremap(mem.start, resource_size(&mem)); if (!reg_base) { ret = -EBUSY; - pr_err("%s: ioremap failed.\n", ictl->name); + pr_err("%pOFn: ioremap failed.\n", ictl); goto ioremap_fail; } @@ -137,8 +137,8 @@ static int __init of_tb10x_init_irq(struct device_node *ictl, &irq_generic_chip_ops, NULL); if (!domain) { ret = -ENOMEM; - pr_err("%s: Could not register interrupt domain.\n", - ictl->name); + pr_err("%pOFn: Could not register interrupt domain.\n", + ictl); goto irq_domain_add_fail; } @@ -147,8 +147,8 @@ static int __init of_tb10x_init_irq(struct device_node *ictl, IRQ_NOREQUEST, IRQ_NOPROBE, IRQ_GC_INIT_MASK_CACHE); if (ret) { - pr_err("%s: Could not allocate generic interrupt chip.\n", - ictl->name); + pr_err("%pOFn: Could not allocate generic interrupt chip.\n", + ictl); goto gc_alloc_fail; } -- cgit v1.2.3-70-g09d2 From c86f98544f234e64bb53558545782c24e78d5c49 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Mon, 27 Aug 2018 19:57:23 -0500 Subject: memory: Convert to using %pOFn instead of device_node.name In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Cc: Roger Quadros Cc: Kukjin Kim Cc: Jonathan Hunter Cc: linux-omap@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Cc: linux-tegra@vger.kernel.org Acked-by: Thierry Reding Acked-by: Tony Lindgren Acked-by: Krzysztof Kozlowski Signed-off-by: Rob Herring --- drivers/memory/omap-gpmc.c | 18 +++++++----------- drivers/memory/samsung/exynos-srom.c | 4 ++-- drivers/memory/tegra/mc.c | 6 +++--- drivers/memory/tegra/tegra124-emc.c | 12 ++++++------ 4 files changed, 18 insertions(+), 22 deletions(-) (limited to 'drivers') diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c index c215287e80cf..8abb9e94916a 100644 --- a/drivers/memory/omap-gpmc.c +++ b/drivers/memory/omap-gpmc.c @@ -2145,8 +2145,8 @@ static int gpmc_probe_generic_child(struct platform_device *pdev, gpmc_s.device_width = GPMC_DEVWIDTH_16BIT; break; default: - dev_err(&pdev->dev, "%s: invalid 'nand-bus-width'\n", - child->name); + dev_err(&pdev->dev, "%pOFn: invalid 'nand-bus-width'\n", + child); ret = -EINVAL; goto err; } @@ -2186,8 +2186,8 @@ static int gpmc_probe_generic_child(struct platform_device *pdev, ret = gpmc_cs_set_timings(cs, &gpmc_t, &gpmc_s); if (ret) { - dev_err(&pdev->dev, "failed to set gpmc timings for: %s\n", - child->name); + dev_err(&pdev->dev, "failed to set gpmc timings for: %pOFn\n", + child); goto err_cs; } @@ -2215,7 +2215,7 @@ no_timings: err_child_fail: - dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name); + dev_err(&pdev->dev, "failed to create gpmc child %pOFn\n", child); ret = -ENODEV; err_cs: @@ -2265,14 +2265,10 @@ static void gpmc_probe_dt_children(struct platform_device *pdev) struct device_node *child; for_each_available_child_of_node(pdev->dev.of_node, child) { - - if (!child->name) - continue; - ret = gpmc_probe_generic_child(pdev, child); if (ret) { - dev_err(&pdev->dev, "failed to probe DT child '%s': %d\n", - child->name, ret); + dev_err(&pdev->dev, "failed to probe DT child '%pOFn': %d\n", + child, ret); } } } diff --git a/drivers/memory/samsung/exynos-srom.c b/drivers/memory/samsung/exynos-srom.c index 7edd7fb540f2..c27c6105c66d 100644 --- a/drivers/memory/samsung/exynos-srom.c +++ b/drivers/memory/samsung/exynos-srom.c @@ -139,8 +139,8 @@ static int exynos_srom_probe(struct platform_device *pdev) for_each_child_of_node(np, child) { if (exynos_srom_configure_bank(srom, child)) { dev_err(dev, - "Could not decode bank configuration for %s\n", - child->name); + "Could not decode bank configuration for %pOFn\n", + child); bad_bank_config = true; } } diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index bd25faf6d13d..24afc36833bf 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -345,7 +345,7 @@ static int load_one_timing(struct tegra_mc *mc, err = of_property_read_u32(node, "clock-frequency", &tmp); if (err) { dev_err(mc->dev, - "timing %s: failed to read rate\n", node->name); + "timing %pOFn: failed to read rate\n", node); return err; } @@ -360,8 +360,8 @@ static int load_one_timing(struct tegra_mc *mc, mc->soc->num_emem_regs); if (err) { dev_err(mc->dev, - "timing %s: failed to read EMEM configuration\n", - node->name); + "timing %pOFn: failed to read EMEM configuration\n", + node); return err; } diff --git a/drivers/memory/tegra/tegra124-emc.c b/drivers/memory/tegra/tegra124-emc.c index 392dc8dd481f..eedb7d48e2ea 100644 --- a/drivers/memory/tegra/tegra124-emc.c +++ b/drivers/memory/tegra/tegra124-emc.c @@ -888,8 +888,8 @@ static int load_one_timing_from_dt(struct tegra_emc *emc, err = of_property_read_u32(node, "clock-frequency", &value); if (err) { - dev_err(emc->dev, "timing %s: failed to read rate: %d\n", - node->name, err); + dev_err(emc->dev, "timing %pOFn: failed to read rate: %d\n", + node, err); return err; } @@ -900,16 +900,16 @@ static int load_one_timing_from_dt(struct tegra_emc *emc, ARRAY_SIZE(timing->emc_burst_data)); if (err) { dev_err(emc->dev, - "timing %s: failed to read emc burst data: %d\n", - node->name, err); + "timing %pOFn: failed to read emc burst data: %d\n", + node, err); return err; } #define EMC_READ_PROP(prop, dtprop) { \ err = of_property_read_u32(node, dtprop, &timing->prop); \ if (err) { \ - dev_err(emc->dev, "timing %s: failed to read " #prop ": %d\n", \ - node->name, err); \ + dev_err(emc->dev, "timing %pOFn: failed to read " #prop ": %d\n", \ + node, err); \ return err; \ } \ } -- cgit v1.2.3-70-g09d2 From f86b77583d88c8402e8d89a339d96f847318f8a8 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Mon, 27 Aug 2018 20:03:42 -0500 Subject: backlight: pm8941: Convert to using %pOFn instead of device_node.name In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Cc: Lee Jones Cc: Daniel Thompson Cc: Jingoo Han Cc: Bartlomiej Zolnierkiewicz Cc: dri-devel@lists.freedesktop.org Cc: linux-fbdev@vger.kernel.org Signed-off-by: Rob Herring --- drivers/video/backlight/pm8941-wled.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/video/backlight/pm8941-wled.c b/drivers/video/backlight/pm8941-wled.c index 0b6d21955d91..da6aab20fdcb 100644 --- a/drivers/video/backlight/pm8941-wled.c +++ b/drivers/video/backlight/pm8941-wled.c @@ -330,7 +330,7 @@ static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev) rc = of_property_read_string(dev->of_node, "label", &wled->name); if (rc) - wled->name = dev->of_node->name; + wled->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node); *cfg = pm8941_wled_config_defaults; for (i = 0; i < ARRAY_SIZE(u32_opts); ++i) { -- cgit v1.2.3-70-g09d2 From acfe63ec1c591629ad04b299ee7bb1d18d299c69 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Wed, 29 Aug 2018 09:08:57 -0500 Subject: mtd: Convert to using %pOFn instead of device_node.name In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Cc: David Woodhouse Cc: Brian Norris Cc: Boris Brezillon Cc: Marek Vasut Cc: Richard Weinberger Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: linux-mtd@lists.infradead.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Rob Herring --- drivers/mtd/devices/powernv_flash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c index 33593122e49b..22f753e555ac 100644 --- a/drivers/mtd/devices/powernv_flash.c +++ b/drivers/mtd/devices/powernv_flash.c @@ -212,7 +212,7 @@ static int powernv_flash_set_driver_info(struct device *dev, * Going to have to check what details I need to set and how to * get them */ - mtd->name = of_get_property(dev->of_node, "name", NULL); + mtd->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node); mtd->type = MTD_NORFLASH; mtd->flags = MTD_WRITEABLE; mtd->size = size; -- cgit v1.2.3-70-g09d2 From e31d0fc6fd1bf62e56e7e3d0b69e7e64d8b7db58 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Wed, 5 Sep 2018 11:34:56 -0500 Subject: power: reset: Convert to using %pOFn instead of device_node.name In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Cc: Sebastian Reichel Cc: linux-pm@vger.kernel.org Signed-off-by: Rob Herring --- drivers/power/reset/axxia-reset.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/power/reset/axxia-reset.c b/drivers/power/reset/axxia-reset.c index 4e4cd1c8fe50..b16013265142 100644 --- a/drivers/power/reset/axxia-reset.c +++ b/drivers/power/reset/axxia-reset.c @@ -65,7 +65,7 @@ static int axxia_reset_probe(struct platform_device *pdev) syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon"); if (IS_ERR(syscon)) { - pr_err("%s: syscon lookup failed\n", dev->of_node->name); + pr_err("%pOFn: syscon lookup failed\n", dev->of_node); return PTR_ERR(syscon); } -- cgit v1.2.3-70-g09d2 From e8b1dee21420f871e300d46342f2c98a2e08158d Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Wed, 29 Aug 2018 08:36:12 -0500 Subject: of: Use device_type helpers to access the node type Remove directly accessing device_node.type pointer and use the accessors instead. This will eventually allow removing the type pointer. Cc: Frank Rowand Cc: devicetree@vger.kernel.org Signed-off-by: Rob Herring --- drivers/of/address.c | 4 ++-- drivers/of/base.c | 18 ++++++++++++------ drivers/of/device.c | 9 +++++---- 3 files changed, 19 insertions(+), 12 deletions(-) (limited to 'drivers') diff --git a/drivers/of/address.c b/drivers/of/address.c index 7ddbf0a1ab86..ae48e121b6e7 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -110,8 +110,8 @@ static int of_bus_pci_match(struct device_node *np) * "vci" is for the /chaos bridge on 1st-gen PCI powermacs * "ht" is hypertransport */ - return !strcmp(np->type, "pci") || !strcmp(np->type, "pciex") || - !strcmp(np->type, "vci") || !strcmp(np->type, "ht"); + return of_node_is_type(np, "pci") || of_node_is_type(np, "pciex") || + of_node_is_type(np, "vci") || of_node_is_type(np, "ht"); } static void of_bus_pci_count_cells(struct device_node *np, diff --git a/drivers/of/base.c b/drivers/of/base.c index 09692c9b32a7..57c837140a8b 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -79,6 +79,13 @@ bool of_node_name_prefix(const struct device_node *np, const char *prefix) } EXPORT_SYMBOL(of_node_name_prefix); +static bool __of_node_is_type(const struct device_node *np, const char *type) +{ + const char *match = __of_get_property(np, "device_type", NULL); + + return np && match && type && !strcmp(match, type); +} + int of_n_addr_cells(struct device_node *np) { u32 cells; @@ -482,7 +489,7 @@ static int __of_device_is_compatible(const struct device_node *device, /* Matching type is better than matching name */ if (type && type[0]) { - if (!device->type || of_node_cmp(type, device->type)) + if (!__of_node_is_type(device, type)) return 0; score += 2; } @@ -775,7 +782,7 @@ struct device_node *of_get_next_cpu_node(struct device_node *prev) } for (; next; next = next->sibling) { if (!(of_node_name_eq(next, "cpu") || - (next->type && !of_node_cmp(next->type, "cpu")))) + __of_node_is_type(next, "cpu"))) continue; if (of_node_get(next)) break; @@ -983,8 +990,7 @@ struct device_node *of_find_node_by_type(struct device_node *from, raw_spin_lock_irqsave(&devtree_lock, flags); for_each_of_allnodes_from(from, np) - if (np->type && (of_node_cmp(np->type, type) == 0) - && of_node_get(np)) + if (__of_node_is_type(np, type) && of_node_get(np)) break; of_node_put(from); raw_spin_unlock_irqrestore(&devtree_lock, flags); @@ -2108,9 +2114,9 @@ struct device_node *of_find_next_cache_node(const struct device_node *np) /* OF on pmac has nodes instead of properties named "l2-cache" * beneath CPU nodes. */ - if (IS_ENABLED(CONFIG_PPC_PMAC) && !strcmp(np->type, "cpu")) + if (IS_ENABLED(CONFIG_PPC_PMAC) && of_node_is_type(np, "cpu")) for_each_child_of_node(np, child) - if (!strcmp(child->type, "cache")) + if (of_node_is_type(child, "cache")) return child; return NULL; diff --git a/drivers/of/device.c b/drivers/of/device.c index 0f27fad9fe94..8299f8055da7 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -209,7 +209,7 @@ static ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len /* Name & Type */ /* %p eats all alphanum characters, so %c must be used here */ csize = snprintf(str, len, "of:N%pOFn%c%s", dev->of_node, 'T', - dev->of_node->type); + of_node_get_device_type(dev->of_node)); tsize = csize; len -= csize; if (str) @@ -279,7 +279,7 @@ EXPORT_SYMBOL_GPL(of_device_modalias); */ void of_device_uevent(struct device *dev, struct kobj_uevent_env *env) { - const char *compat; + const char *compat, *type; struct alias_prop *app; struct property *p; int seen = 0; @@ -289,8 +289,9 @@ void of_device_uevent(struct device *dev, struct kobj_uevent_env *env) add_uevent_var(env, "OF_NAME=%pOFn", dev->of_node); add_uevent_var(env, "OF_FULLNAME=%pOF", dev->of_node); - if (dev->of_node->type && strcmp("", dev->of_node->type) != 0) - add_uevent_var(env, "OF_TYPE=%s", dev->of_node->type); + type = of_node_get_device_type(dev->of_node); + if (type) + add_uevent_var(env, "OF_TYPE=%s", type); /* Since the compatible field can contain pretty much anything * it's not really legal to split it out with commas. We split it -- cgit v1.2.3-70-g09d2 From e1e5254427525d59a184771b122469c998e53b58 Mon Sep 17 00:00:00 2001 From: Nick Kossifidis Date: Sat, 10 Nov 2018 02:53:17 +0200 Subject: OF: Add a warning in case chosen node is not present On architectures that only get their bootargs through devicetree's chosen node (such as RISC-V), that node is mandatory. After a discussion with Rob [1] I'm adding a warning in case chosen node is not present, to let users know about it. [1]: https://patchwork.ozlabs.org/patch/984224/#2016136 Signed-off-by: Nick Kossifidis Reviewed-by: Palmer Dabbelt Signed-off-by: Rob Herring --- drivers/of/fdt.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index cd72a41fcab2..7099c652c6a5 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -1207,8 +1207,12 @@ bool __init early_init_dt_verify(void *params) void __init early_init_dt_scan_nodes(void) { + int rc = 0; + /* Retrieve various information from the /chosen node */ - of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line); + rc = of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line); + if (!rc) + pr_warn("No chosen node found, continuing without\n"); /* Initialize {size,address}-cells info */ of_scan_flat_dt(early_init_dt_scan_root, NULL); -- cgit v1.2.3-70-g09d2 From b3e46d1a0590500335f0b95e669ad6d84b12b03a Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Mon, 27 Aug 2018 08:37:06 -0500 Subject: of: Use of_node_name_eq for node name comparisons Convert string compares of DT node names to use of_node_name_eq helper instead. This removes direct access to the node name pointer. Cc: Frank Rowand Cc: Pantelis Antoniou Cc: devicetree@vger.kernel.org Signed-off-by: Rob Herring --- drivers/of/address.c | 2 +- drivers/of/base.c | 7 +++---- drivers/of/property.c | 10 +++++----- drivers/of/resolver.c | 4 ++-- drivers/of/unittest.c | 4 ++-- 5 files changed, 13 insertions(+), 14 deletions(-) (limited to 'drivers') diff --git a/drivers/of/address.c b/drivers/of/address.c index ae48e121b6e7..2270373b30ab 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -371,7 +371,7 @@ EXPORT_SYMBOL(of_pci_range_to_resource); static int of_bus_isa_match(struct device_node *np) { - return !strcmp(np->name, "isa"); + return of_node_name_eq(np, "isa"); } static void of_bus_isa_count_cells(struct device_node *child, diff --git a/drivers/of/base.c b/drivers/of/base.c index 57c837140a8b..998d032fcef9 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -496,7 +496,7 @@ static int __of_device_is_compatible(const struct device_node *device, /* Matching name is a bit better than not */ if (name && name[0]) { - if (!device->name || of_node_cmp(name, device->name)) + if (!of_node_name_eq(device, name)) return 0; score++; } @@ -835,7 +835,7 @@ struct device_node *of_get_child_by_name(const struct device_node *node, struct device_node *child; for_each_child_of_node(node, child) - if (child->name && (of_node_cmp(child->name, name) == 0)) + if (of_node_name_eq(child, name)) break; return child; } @@ -961,8 +961,7 @@ struct device_node *of_find_node_by_name(struct device_node *from, raw_spin_lock_irqsave(&devtree_lock, flags); for_each_of_allnodes_from(from, np) - if (np->name && (of_node_cmp(np->name, name) == 0) - && of_node_get(np)) + if (of_node_name_eq(np, name) && of_node_get(np)) break; of_node_put(from); raw_spin_unlock_irqrestore(&devtree_lock, flags); diff --git a/drivers/of/property.c b/drivers/of/property.c index f46828e3b082..08430031bd28 100644 --- a/drivers/of/property.c +++ b/drivers/of/property.c @@ -571,7 +571,7 @@ struct device_node *of_graph_get_port_by_id(struct device_node *parent, u32 id) for_each_child_of_node(parent, port) { u32 port_id = 0; - if (of_node_cmp(port->name, "port") != 0) + if (!of_node_name_eq(port, "port")) continue; of_property_read_u32(port, "reg", &port_id); if (id == port_id) @@ -646,7 +646,7 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent, port = of_get_next_child(parent, port); if (!port) return NULL; - } while (of_node_cmp(port->name, "port")); + } while (!of_node_name_eq(port, "port")); } } EXPORT_SYMBOL(of_graph_get_next_endpoint); @@ -715,7 +715,7 @@ struct device_node *of_graph_get_port_parent(struct device_node *node) /* Walk 3 levels up only if there is 'ports' node. */ for (depth = 3; depth && node; depth--) { node = of_get_next_parent(node); - if (depth == 2 && of_node_cmp(node->name, "ports")) + if (depth == 2 && !of_node_name_eq(node, "ports")) break; } return node; @@ -893,7 +893,7 @@ of_fwnode_get_named_child_node(const struct fwnode_handle *fwnode, struct device_node *child; for_each_available_child_of_node(node, child) - if (!of_node_cmp(child->name, childname)) + if (of_node_name_eq(child, childname)) return of_fwnode_handle(child); return NULL; @@ -955,7 +955,7 @@ of_fwnode_graph_get_port_parent(struct fwnode_handle *fwnode) return NULL; /* Is this the "ports" node? If not, it's the port parent. */ - if (of_node_cmp(np->name, "ports")) + if (!of_node_name_eq(np, "ports")) return of_fwnode_handle(np); return of_fwnode_handle(of_get_next_parent(np)); diff --git a/drivers/of/resolver.c b/drivers/of/resolver.c index 7edfac6f1914..c1b67dd7cd6e 100644 --- a/drivers/of/resolver.c +++ b/drivers/of/resolver.c @@ -281,7 +281,7 @@ int of_resolve_phandles(struct device_node *overlay) adjust_overlay_phandles(overlay, phandle_delta); for_each_child_of_node(overlay, local_fixups) - if (!of_node_cmp(local_fixups->name, "__local_fixups__")) + if (of_node_name_eq(local_fixups, "__local_fixups__")) break; err = adjust_local_phandle_references(local_fixups, overlay, phandle_delta); @@ -291,7 +291,7 @@ int of_resolve_phandles(struct device_node *overlay) overlay_fixups = NULL; for_each_child_of_node(overlay, child) { - if (!of_node_cmp(child->name, "__fixups__")) + if (of_node_name_eq(child, "__fixups__")) overlay_fixups = child; } diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index 9a10a48eb6a1..84427384654d 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -2393,7 +2393,7 @@ static __init void of_unittest_overlay_high_level(void) */ pprev = &overlay_base_root->child; for (np = overlay_base_root->child; np; np = np->sibling) { - if (!of_node_cmp(np->name, "__local_fixups__")) { + if (of_node_name_eq(np, "__local_fixups__")) { *pprev = np->sibling; break; } @@ -2406,7 +2406,7 @@ static __init void of_unittest_overlay_high_level(void) /* will have to graft properties from node into live tree */ pprev = &overlay_base_root->child; for (np = overlay_base_root->child; np; np = np->sibling) { - if (!of_node_cmp(np->name, "__symbols__")) { + if (of_node_name_eq(np, "__symbols__")) { overlay_base_symbols = np; *pprev = np->sibling; break; -- cgit v1.2.3-70-g09d2 From b8a9ac1a5b99a2fcbed19fd29d2d59270c281a31 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Tue, 18 Dec 2018 11:40:02 -0800 Subject: of: of_node_get()/of_node_put() nodes held in phandle cache The phandle cache contains struct device_node pointers. The refcount of the pointers was not incremented while in the cache, allowing use after free error after kfree() of the node. Add the proper increment and decrement of the use count. Fixes: 0b3ce78e90fc ("of: cache phandle nodes to reduce cost of of_find_node_by_phandle()") Cc: stable@vger.kernel.org # v4.17+ Signed-off-by: Frank Rowand Signed-off-by: Rob Herring --- drivers/of/base.c | 70 ++++++++++++++++++++++++++++++++++++------------------- 1 file changed, 46 insertions(+), 24 deletions(-) (limited to 'drivers') diff --git a/drivers/of/base.c b/drivers/of/base.c index 998d032fcef9..4da1c688995b 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -123,9 +123,6 @@ int __weak of_node_to_nid(struct device_node *np) } #endif -static struct device_node **phandle_cache; -static u32 phandle_cache_mask; - /* * Assumptions behind phandle_cache implementation: * - phandle property values are in a contiguous range of 1..n @@ -134,6 +131,44 @@ static u32 phandle_cache_mask; * - the phandle lookup overhead reduction provided by the cache * will likely be less */ + +static struct device_node **phandle_cache; +static u32 phandle_cache_mask; + +/* + * Caller must hold devtree_lock. + */ +static void __of_free_phandle_cache(void) +{ + u32 cache_entries = phandle_cache_mask + 1; + u32 k; + + if (!phandle_cache) + return; + + for (k = 0; k < cache_entries; k++) + of_node_put(phandle_cache[k]); + + kfree(phandle_cache); + phandle_cache = NULL; +} + +int of_free_phandle_cache(void) +{ + unsigned long flags; + + raw_spin_lock_irqsave(&devtree_lock, flags); + + __of_free_phandle_cache(); + + raw_spin_unlock_irqrestore(&devtree_lock, flags); + + return 0; +} +#if !defined(CONFIG_MODULES) +late_initcall_sync(of_free_phandle_cache); +#endif + void of_populate_phandle_cache(void) { unsigned long flags; @@ -143,8 +178,7 @@ void of_populate_phandle_cache(void) raw_spin_lock_irqsave(&devtree_lock, flags); - kfree(phandle_cache); - phandle_cache = NULL; + __of_free_phandle_cache(); for_each_of_allnodes(np) if (np->phandle && np->phandle != OF_PHANDLE_ILLEGAL) @@ -162,30 +196,15 @@ void of_populate_phandle_cache(void) goto out; for_each_of_allnodes(np) - if (np->phandle && np->phandle != OF_PHANDLE_ILLEGAL) + if (np->phandle && np->phandle != OF_PHANDLE_ILLEGAL) { + of_node_get(np); phandle_cache[np->phandle & phandle_cache_mask] = np; + } out: raw_spin_unlock_irqrestore(&devtree_lock, flags); } -int of_free_phandle_cache(void) -{ - unsigned long flags; - - raw_spin_lock_irqsave(&devtree_lock, flags); - - kfree(phandle_cache); - phandle_cache = NULL; - - raw_spin_unlock_irqrestore(&devtree_lock, flags); - - return 0; -} -#if !defined(CONFIG_MODULES) -late_initcall_sync(of_free_phandle_cache); -#endif - void __init of_core_init(void) { struct device_node *np; @@ -1200,8 +1219,11 @@ struct device_node *of_find_node_by_phandle(phandle handle) if (!np) { for_each_of_allnodes(np) if (np->phandle == handle) { - if (phandle_cache) + if (phandle_cache) { + /* will put when removed from cache */ + of_node_get(np); phandle_cache[masked_handle] = np; + } break; } } -- cgit v1.2.3-70-g09d2 From 5801169a2ed20003f771acecf3ac00574cf10a38 Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Tue, 18 Dec 2018 11:40:03 -0800 Subject: of: __of_detach_node() - remove node from phandle cache Non-overlay dynamic devicetree node removal may leave the node in the phandle cache. Subsequent calls to of_find_node_by_phandle() will incorrectly find the stale entry. Remove the node from the cache. Add paranoia checks in of_find_node_by_phandle() as a second level of defense (do not return cached node if detached, do not add node to cache if detached). Fixes: 0b3ce78e90fc ("of: cache phandle nodes to reduce cost of of_find_node_by_phandle()") Reported-by: Michael Bringmann Cc: stable@vger.kernel.org # v4.17+ Signed-off-by: Frank Rowand Signed-off-by: Rob Herring --- drivers/of/base.c | 31 ++++++++++++++++++++++++++++++- drivers/of/dynamic.c | 3 +++ drivers/of/of_private.h | 4 ++++ 3 files changed, 37 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/of/base.c b/drivers/of/base.c index 4da1c688995b..5226e898476e 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -169,6 +169,28 @@ int of_free_phandle_cache(void) late_initcall_sync(of_free_phandle_cache); #endif +/* + * Caller must hold devtree_lock. + */ +void __of_free_phandle_cache_entry(phandle handle) +{ + phandle masked_handle; + struct device_node *np; + + if (!handle) + return; + + masked_handle = handle & phandle_cache_mask; + + if (phandle_cache) { + np = phandle_cache[masked_handle]; + if (np && handle == np->phandle) { + of_node_put(np); + phandle_cache[masked_handle] = NULL; + } + } +} + void of_populate_phandle_cache(void) { unsigned long flags; @@ -1214,11 +1236,18 @@ struct device_node *of_find_node_by_phandle(phandle handle) if (phandle_cache[masked_handle] && handle == phandle_cache[masked_handle]->phandle) np = phandle_cache[masked_handle]; + if (np && of_node_check_flag(np, OF_DETACHED)) { + WARN_ON(1); /* did not uncache np on node removal */ + of_node_put(np); + phandle_cache[masked_handle] = NULL; + np = NULL; + } } if (!np) { for_each_of_allnodes(np) - if (np->phandle == handle) { + if (np->phandle == handle && + !of_node_check_flag(np, OF_DETACHED)) { if (phandle_cache) { /* will put when removed from cache */ of_node_get(np); diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index b4e5b90cb314..a09c1c3cf831 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -277,6 +277,9 @@ void __of_detach_node(struct device_node *np) } of_node_set_flag(np, OF_DETACHED); + + /* race with of_find_node_by_phandle() prevented by devtree_lock */ + __of_free_phandle_cache_entry(np->phandle); } /** diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h index 5d1567025358..24786818e32e 100644 --- a/drivers/of/of_private.h +++ b/drivers/of/of_private.h @@ -84,6 +84,10 @@ static inline void __of_detach_node_sysfs(struct device_node *np) {} int of_resolve_phandles(struct device_node *tree); #endif +#if defined(CONFIG_OF_DYNAMIC) +void __of_free_phandle_cache_entry(phandle handle); +#endif + #if defined(CONFIG_OF_OVERLAY) void of_overlay_mutex_lock(void); void of_overlay_mutex_unlock(void); -- cgit v1.2.3-70-g09d2