From: Mikulas Patocka <mpatocka@redhat.com>
Date: Mon, 22 Jun 2009 09:12:20 +0000 (+0100)
Subject: dm: remove check that prevents mapping empty bios
X-Git-Tag: upstream/snapshot3+hdmi~18286^2~31
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=27eaa14975d8b53f0bad422e53cdf8e5f6dd44ec;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

dm: remove check that prevents mapping empty bios

Remove the check that the size of the cloned bio is not zero because a
subsequent patch needs to send zero-sized barriers down this path.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 8498dc4..7d9ca70 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -637,11 +637,6 @@ static void __map_bio(struct dm_target *ti, struct bio *clone,
 	sector_t sector;
 	struct mapped_device *md;
 
-	/*
-	 * Sanity checks.
-	 */
-	BUG_ON(!clone->bi_size);
-
 	clone->bi_end_io = clone_endio;
 	clone->bi_private = tio;