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

------------------

From: Mike Snitzer <[email protected]>

commit fe76cd88e654124d1431bb662a0fc6e99ca811a5 upstream.

If unable to ensure_next_mapping() we must add the current bio, which
was removed from the @bios list via bio_list_pop, back to the
deferred_bios list before all the remaining @bios.

Signed-off-by: Mike Snitzer <[email protected]>
Acked-by: Joe Thornber <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 drivers/md/dm-thin.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -1392,9 +1392,9 @@ static void process_deferred_bios(struct
                 */
                if (ensure_next_mapping(pool)) {
                        spin_lock_irqsave(&pool->lock, flags);
+                       bio_list_add(&pool->deferred_bios, bio);
                        bio_list_merge(&pool->deferred_bios, &bios);
                        spin_unlock_irqrestore(&pool->lock, flags);
-
                        break;
                }
 


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