Merge tag 'v4.8' into patchwork

Linux 4.8

* tag 'v4.8': (1761 commits)
  Linux 4.8
  ARM: 8618/1: decompressor: reset ttbcr fields to use TTBR0 on ARMv7
  MIPS: CM: Fix mips_cm_max_vp_width for non-MT kernels on MT systems
  include/linux/property.h: fix typo/compile error
  ocfs2: fix deadlock on mmapped page in ocfs2_write_begin_nolock()
  mm: workingset: fix crash in shadow node shrinker caused by replace_page_cache_page()
  MAINTAINERS: Switch to kernel.org email address for Javi Merino
  x86/entry/64: Fix context tracking state warning when load_gs_index fails
  x86/boot: Initialize FPU and X86_FEATURE_ALWAYS even if we don't have CPUID
  x86/vdso: Fix building on big endian host
  x86/boot: Fix another __read_cr4() case on 486
  sctp: fix the issue sctp_diag uses lock_sock in rcu_read_lock
  sctp: change to check peer prsctp_capable when using prsctp polices
  sctp: remove prsctp_param from sctp_chunk
  sctp: move sent_count to the memory hole in sctp_chunk
  tg3: Avoid NULL pointer dereference in tg3_io_error_detected()
  x86/init: Fix cr4_init_shadow() on CR4-less machines
  MIPS: Fix detection of unsupported highmem with cache aliases
  MIPS: Malta: Fix IOCU disable switch read for MIPS64
  MIPS: Fix BUILD_ROLLBACK_PROLOGUE for microMIPS
  ...

1 files changed, 30 insertions, 16 deletions

diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 6a31f2610c23..daf4c7867102 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -271,6 +271,11 @@ static int netback_probe(struct xenbus_device *dev,
 	be->dev = dev;
 	dev_set_drvdata(&dev->dev, be);
 
+	be->state = XenbusStateInitialising;
+	err = xenbus_switch_state(dev, XenbusStateInitialising);
+	if (err)
+		goto fail;
+
 	sg = 1;
 
 	do {
@@ -383,11 +388,6 @@ static int netback_probe(struct xenbus_device *dev,
 
 	be->hotplug_script = script;
 
-	err = xenbus_switch_state(dev, XenbusStateInitWait);
-	if (err)
-		goto fail;
-
-	be->state = XenbusStateInitWait;
 
 	/* This kicks hotplug scripts, so do it immediately. */
 	err = backend_create_xenvif(be);
@@ -492,20 +492,20 @@ static inline void backend_switch_state(struct backend_info *be,
 
 /* Handle backend state transitions:
  *
- * The backend state starts in InitWait and the following transitions are
+ * The backend state starts in Initialising and the following transitions are
  * allowed.
  *
- * InitWait -> Connected
- *
- *    ^    \         |
- *    |     \        |
- *    |      \       |
- *    |       \      |
- *    |        \     |
- *    |         \    |
- *    |          V   V
+ * Initialising -> InitWait -> Connected
+ *          \
+ *           \        ^    \         |
+ *            \       |     \        |
+ *             \      |      \       |
+ *              \     |       \      |
+ *               \    |        \     |
+ *                \   |         \    |
+ *                 V  |          V   V
  *
- *  Closed  <-> Closing
+ *                  Closed  <-> Closing
  *
  * The state argument specifies the eventual state of the backend and the
  * function transitions to that state via the shortest path.
@@ -515,6 +515,20 @@ static void set_backend_state(struct backend_info *be,
 {
 	while (be->state != state) {
 		switch (be->state) {
+		case XenbusStateInitialising:
+			switch (state) {
+			case XenbusStateInitWait:
+			case XenbusStateConnected:
+			case XenbusStateClosing:
+				backend_switch_state(be, XenbusStateInitWait);
+				break;
+			case XenbusStateClosed:
+				backend_switch_state(be, XenbusStateClosed);
+				break;
+			default:
+				BUG();
+			}
+			break;
 		case XenbusStateClosed:
 			switch (state) {
 			case XenbusStateInitWait: