When dm_suspend() is interrupted, it's possible that some bios are
queued to deferred list.
DMF_BLOCK_IO modification must be protected by io->lock.

Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>


--- linux-2.6.16-rc5.orig/drivers/md/dm.c	2006-02-27 00:09:35.000000000 -0500
+++ linux-2.6.16-rc5/drivers/md/dm.c	2006-03-08 14:54:09.000000000 -0500
@@ -1152,9 +1152,10 @@ int dm_suspend(struct mapped_device *md,
 	/* were we interrupted ? */
 	r = -EINTR;
 	if (atomic_read(&md->pending)) {
+		clear_bit(DMF_BLOCK_IO, &md->flags);
+		__flush_deferred_io(md, bio_list_get(&md->deferred));
 		up_write(&md->io_lock);
 		unlock_fs(md);
-		clear_bit(DMF_BLOCK_IO, &md->flags);
 		goto out;
 	}
 	up_write(&md->io_lock);