From: Martin K. Petersen <martin.petersen@oracle.com>
Date: Wed, 16 Jul 2008 20:09:06 +0000 (-0400)
Subject: block: Trivial fix for blk_integrity_rq()
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=d442cc44c0db56e84ef6aa244a88427d2efe06cd;p=linux-2.6-xen.git%2F.git

block: Trivial fix for blk_integrity_rq()

Fail integrity check gracefully when request does not have a bio
attached (BLOCK_PC).

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 32a441b05f..88d68081a0 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -985,6 +985,9 @@ static inline int bdev_integrity_enabled(struct block_device *bdev, int rw)
 
 static inline int blk_integrity_rq(struct request *rq)
 {
+	if (rq->bio == NULL)
+		return 0;
+
 	return bio_integrity(rq->bio);
 }