[PATCH] md: fix oops in error-handling
During early MD setup (superblock reading), we don't have a personality yet.
But the error-handling code tries to dereference mddev->pers. Fix.
Acked-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index a5286be..b6d1602 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4592,6 +4592,8 @@
__builtin_return_address(0),__builtin_return_address(1),
__builtin_return_address(2),__builtin_return_address(3));
*/
+ if (!mddev->pers)
+ return;
if (!mddev->pers->error_handler)
return;
mddev->pers->error_handler(mddev,rdev);