linux-kernel - [ 20/54] md: Reassigned the parameters if read_seqretry returned true in func md_is

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Message-Id: <20121130185209.935969916@linuxfoundation.org>
Date:	Fri, 30 Nov 2012 10:55:51 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	alan@...rguk.ukuu.org.uk, Jianpeng Ma <majianpeng@...il.com>,
	NeilBrown <neilb@...e.de>
Subject: [ 20/54] md: Reassigned the parameters if read_seqretry returned true in func md_is_badblock.

3.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: majianpeng <majianpeng@...il.com>

commit ab05613a0646dcc11049692d54bae76ca9ffa910 upstream.

This bug was introduced by commit(v3.0-rc7-126-g2230dfe).
So fix is suitable for 3.0.y thru 3.6.y.

Signed-off-by: Jianpeng Ma <majianpeng@...il.com>
Signed-off-by: NeilBrown <neilb@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/md/md.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7907,9 +7907,9 @@ int md_is_badblock(struct badblocks *bb,
 		   sector_t *first_bad, int *bad_sectors)
 {
 	int hi;
-	int lo = 0;
+	int lo;
 	u64 *p = bb->page;
-	int rv = 0;
+	int rv;
 	sector_t target = s + sectors;
 	unsigned seq;
 
@@ -7924,7 +7924,8 @@ int md_is_badblock(struct badblocks *bb,
 
 retry:
 	seq = read_seqbegin(&bb->lock);
-
+	lo = 0;
+	rv = 0;
 	hi = bb->count;
 
 	/* Binary search between lo and hi for 'target'


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