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>
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 866ff19..f8cdd97 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -525,14 +525,15 @@
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);