[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>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index a64798ef481..48be69f3bcf 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1107,6 +1107,7 @@ int dm_suspend(struct mapped_device *md, int do_lockfs)
 {
         struct dm_table *map = NULL;
         DECLARE_WAITQUEUE(wait, current);
+        struct bio *def;
         int r = -EINVAL;
 
         down(&md->suspend_lock);
@@ -1166,9 +1167,11 @@ int dm_suspend(struct mapped_device *md, int do_lockfs)
         /* 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);