From: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Date: Mon, 27 Mar 2006 09:17:51 +0000 (-0800)
Subject: [PATCH] dm flush queue EINTR
X-Git-Url: http://www.kernel.org/git/?p=linux/kernel/git/stable/linux-2.6.16.y.git;a=commitdiff;h=ebea8457d4b94864a818ae3e6a95655602244935

[PATCH] dm flush queue EINTR

If dm_suspend() is cancelled, bios already added to the deferred list need to
be submitted.  Otherwise they remain 'in limbo' until there's a dm_resume().

Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1098,6 +1098,7 @@ int dm_suspend(struct mapped_device *md,
 {
 	struct dm_table *map = NULL;
 	DECLARE_WAITQUEUE(wait, current);
+	struct bio *def;
 	int r = -EINVAL;
 
 	down(&md->suspend_lock);
@@ -1157,9 +1158,11 @@ int dm_suspend(struct mapped_device *md,
 	/* were we interrupted ? */
 	r = -EINTR;
 	if (atomic_read(&md->pending)) {
+		clear_bit(DMF_BLOCK_IO, &md->flags);
+		def = bio_list_get(&md->deferred);
+		__flush_deferred_io(md, def);
 		up_write(&md->io_lock);
 		unlock_fs(md);
-		clear_bit(DMF_BLOCK_IO, &md->flags);
 		goto out;
 	}
 	up_write(&md->io_lock);