dm: return earlier from dm_blk_ioctl if target doesn't implement .ioctl

No point checking if the device is suspended if the current target
doesn't even implement .ioctl

Signed-off-by: Mike Snitzer <snitzer@redhat.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 866ff19aa438..f8cdd97c28a7 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -525,14 +525,15 @@ retry:
                 goto out;
 
         tgt = dm_table_get_target(map, 0);
+        if (!tgt->type->ioctl)
+                goto out;
 
         if (dm_suspended_md(md)) {
                 r = -EAGAIN;
                 goto out;
         }
 
-        if (tgt->type->ioctl)
-                r = tgt->type->ioctl(tgt, cmd, arg);
+        r = tgt->type->ioctl(tgt, cmd, arg);
 
 out:
         dm_put_live_table(md, srcu_idx);