[patch 13/24] dm flush queue EINTR

[Greg KH <gregkh@suse.de>]

-stable review patch.  If anyone has any objections, please let us know.

------------------
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>

---
 drivers/md/dm.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- linux-2.6.16.11.orig/drivers/md/dm.c
+++ linux-2.6.16.11/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);

--
-
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