[PATCH 2/7] dm flush queue EINTR

[Alasdair G Kergon <agk@redhat.com>]

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

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>

Index: linux-2.6.16-rc5/drivers/md/dm.c
===================================================================
--- linux-2.6.16-rc5.orig/drivers/md/dm.c	2006-03-12 21:56:04.000000000 +0000
+++ linux-2.6.16-rc5/drivers/md/dm.c	2006-03-12 21:58:05.000000000 +0000
@@ -1093,6 +1093,7 @@ 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);
@@ -1152,9 +1153,11 @@ 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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