linux-kernel - [PATCH] block: Fix BUG

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Date:	Wed, 13 Aug 2014 14:49:31 +0300
From:	Sagi Grimberg <sagig@...lanox.com>
To:	axboe@...nel.dk, martin.petersen@...cle.com
Cc:	kmo@...erainc.com, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] block: Fix BUG_ON when pi errors occur

When getting a pi error we get to bio_integrity_end_io with
bi_remaining already decremented to 0 where we will eventually
need to call bio_endio with restored original bio completion handler.
Calling bio_endio invokes a BUG_ON(). We should call bio_endio_nodec
instead, like what is done in bio_integrity_verify_fn.

Signed-off-by: Sagi Grimberg <sagig@...lanox.com>
---
 block/bio-integrity.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 9e24106..90d40f9 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -526,7 +526,7 @@ void bio_integrity_endio(struct bio *bio, int error)
 	 */
 	if (error) {
 		bio->bi_end_io = bip->bip_end_io;
-		bio_endio(bio, error);
+		bio_endio_nodec(bio, error);
 
 		return;
 	}
-- 
1.7.1

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