From d0a0a5ee7a0094231a11cfe3f86d2d8f5f994e01 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@osdl.org>
Date: Mon, 10 Jul 2006 04:44:20 -0700
Subject: [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>
---
 drivers/md/md.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers/md')

diff --git a/drivers/md/md.c b/drivers/md/md.c
index a5286beddcf..b6d16022a53 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4592,6 +4592,8 @@ void md_error(mddev_t *mddev, mdk_rdev_t *rdev)
 		__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);
-- 
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