linux-kernel - [PATCH] dm table: pass device's data start to blk_stack

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Message-Id: <1245958270-23578-1-git-send-email-snitzer@redhat.com>
Date:	Thu, 25 Jun 2009 15:31:10 -0400
From:	Mike Snitzer <snitzer@...hat.com>
To:	dm-devel@...hat.com, linux-kernel@...r.kernel.org
Subject: [PATCH] dm table: pass device's data start to blk_stack_limits() in bytes

The offset passed to blk_stack_limits() must be in bytes not sectors.
Fixes false warnings like the following:
device-mapper: table: 254:1: target device sda6 is misaligned

Signed-off-by: Mike Snitzer <snitzer@...hat.com>
Reported-by: Frans Pop <elendil@...net.nl>
Tested-by: Frans Pop <elendil@...net.nl>

--
Index: linux-2.6/drivers/md/dm-table.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-table.c
+++ linux-2.6/drivers/md/dm-table.c
@@ -495,7 +495,7 @@ int dm_set_device_limits(struct dm_targe
 		return 0;
 	}
 
-	if (blk_stack_limits(limits, &q->limits, start) < 0)
+	if (blk_stack_limits(limits, &q->limits, start << 9) < 0)
 		DMWARN("%s: target device %s is misaligned",
 		       dm_device_name(ti->table->md), bdevname(bdev, b));
 
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