diff options
Diffstat (limited to 'drivers/of/address.c')
| -rw-r--r-- | drivers/of/address.c | 58 |
1 files changed, 28 insertions, 30 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c index c5b925ac469f..125833e5ce52 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -16,25 +16,10 @@ #include <linux/string.h> #include <linux/dma-direct.h> /* for bus_dma_region */ -#include "of_private.h" - -/* Max address size we deal with */ -#define OF_MAX_ADDR_CELLS 4 -#define OF_CHECK_ADDR_COUNT(na) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS) -#define OF_CHECK_COUNTS(na, ns) (OF_CHECK_ADDR_COUNT(na) && (ns) > 0) +/* Uncomment me to enable of_dump_addr() debugging output */ +// #define DEBUG -/* Debug utility */ -#ifdef DEBUG -static void of_dump_addr(const char *s, const __be32 *addr, int na) -{ - pr_debug("%s", s); - while (na--) - pr_cont(" %08x", be32_to_cpu(*(addr++))); - pr_cont("\n"); -} -#else -static void of_dump_addr(const char *s, const __be32 *addr, int na) { } -#endif +#include "of_private.h" /* Callbacks for bus specific translators */ struct of_bus { @@ -200,17 +185,15 @@ static u64 of_bus_pci_map(__be32 *addr, const __be32 *range, int na, int ns, static int __of_address_resource_bounds(struct resource *r, u64 start, u64 size) { - u64 end = start; - if (overflows_type(start, r->start)) return -EOVERFLOW; - if (size && check_add_overflow(end, size - 1, &end)) - return -EOVERFLOW; - if (overflows_type(end, r->end)) - return -EOVERFLOW; r->start = start; - r->end = end; + + if (!size) + r->end = wrapping_sub(typeof(r->end), r->start, 1); + else if (size && check_add_overflow(r->start, size - 1, &r->end)) + return -EOVERFLOW; return 0; } @@ -340,6 +323,15 @@ static int of_bus_default_flags_match(struct device_node *np) return of_property_present(np, "#address-cells") && (of_bus_n_addr_cells(np) == 3); } +static int of_bus_default_match(struct device_node *np) +{ + /* + * Check for presence first since of_bus_n_addr_cells() will warn when + * walking parent nodes. + */ + return of_property_present(np, "#address-cells"); +} + /* * Array of bus specific translators */ @@ -384,7 +376,7 @@ static const struct of_bus of_busses[] = { { .name = "default", .addresses = "reg", - .match = NULL, + .match = of_bus_default_match, .count_cells = of_bus_default_count_cells, .map = of_bus_default_map, .translate = of_bus_default_translate, @@ -399,7 +391,6 @@ static const struct of_bus *of_match_bus(struct device_node *np) for (i = 0; i < ARRAY_SIZE(of_busses); i++) if (!of_busses[i].match || of_busses[i].match(np)) return &of_busses[i]; - BUG(); return NULL; } @@ -459,7 +450,8 @@ static int of_translate_one(const struct device_node *parent, const struct of_bu } if (ranges == NULL || rlen == 0) { offset = of_read_number(addr, na); - memset(addr, 0, pna * 4); + /* set address to zero, pass flags through */ + memset(addr + pbus->flag_cells, 0, (pna - pbus->flag_cells) * 4); pr_debug("empty ranges; 1:1 translation\n"); goto finish; } @@ -520,6 +512,8 @@ static u64 __of_translate_address(struct device_node *node, if (parent == NULL) return OF_BAD_ADDR; bus = of_match_bus(parent); + if (!bus) + return OF_BAD_ADDR; /* Count address cells & copy address locally */ bus->count_cells(dev, &na, &ns); @@ -563,6 +557,8 @@ static u64 __of_translate_address(struct device_node *node, /* Get new parent bus and counts */ pbus = of_match_bus(parent); + if (!pbus) + return OF_BAD_ADDR; pbus->count_cells(dev, &pna, &pns); if (!OF_CHECK_COUNTS(pna, pns)) { pr_err("Bad cell count for %pOF\n", dev); @@ -619,7 +615,7 @@ struct device_node *__of_get_dma_parent(const struct device_node *np) if (ret < 0) return of_get_parent(np); - return of_node_get(args.np); + return args.np; } #endif @@ -702,7 +698,7 @@ const __be32 *__of_get_address(struct device_node *dev, int index, int bar_no, /* match the parent's bus type */ bus = of_match_bus(parent); - if (strcmp(bus->name, "pci") && (bar_no >= 0)) + if (!bus || (strcmp(bus->name, "pci") && (bar_no >= 0))) return NULL; /* Get "reg" or "assigned-addresses" property */ @@ -815,6 +811,8 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser, else range->cpu_addr = of_translate_address(parser->node, parser->range + na); + + range->parent_bus_addr = of_read_number(parser->range + na, parser->pna); range->size = of_read_number(parser->range + parser->pna + na, ns); parser->range += np; |