[PATCH] Fix Cont00045892: bnx2fc 0.2.3: Cannot shutdown a system

[Hugh Daschbach]

Detect and attempt recovery from devices_kset->list corruption.

The list gets corrupted during reboot by a race between
device_shutdown() and scsi_remove_target().

Signed-off-by: Hugh Daschbach <hdasch@xxxxxxxxxxxx>
---
 drivers/base/core.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 2820257..07851e9 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1733,6 +1733,7 @@ void device_shutdown(void)
 {
 	struct device *dev, *devn;

+retry:
 	list_for_each_entry_safe_reverse(dev, devn, &devices_kset->list,
 				kobj.entry) {
 		if (dev->bus && dev->bus->shutdown) {
@@ -1742,6 +1743,9 @@ void device_shutdown(void)
 			dev_dbg(dev, "shutdown\n");
 			dev->driver->shutdown(dev);
 		}
+		if (devn->kobj.entry.next == devn->kobj.entry.prev &&
+		    devn->kobj.entry.next != &devices_kset->list)
+			goto retry;
 	}
 	async_synchronize_full();
 }
-- 
1.7.0.rc0.48.gdace5


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