[PATCH] ucc_geth: changes to ucc_geth driver as a result of qe_lib changes and bugfixes

[~andy/linux] / drivers / md / dm-bio-list.h

diff --git a/drivers/md/dm-bio-list.h b/drivers/md/dm-bio-list.h
index bc021e1fd4d14b6d04a465cc6e91c7491032bfb7..bbf4615f0e30d792990208325fa9fa48580ce879 100644 (file)
--- a/drivers/md/dm-bio-list.h
+++ b/drivers/md/dm-bio-list.h
@@ -33,6 +33,9 @@ static inline void bio_list_add(struct bio_list *bl, struct bio *bio)
 
 static inline void bio_list_merge(struct bio_list *bl, struct bio_list *bl2)
 {
+       if (!bl2->head)
+               return;
+
        if (bl->tail)
                bl->tail->bi_next = bl2->head;
        else