rbd: drop dev registration check for new snap
By the time rbd_dev_snaps_register() gets called during rbd device
initialization, the main device will have already been registered.
Similarly, a header refresh will only occur for an rbd device whose
Linux device is registered. There is therefore no need to verify
the main device is registered when registering a snapshot device.
For the time being, turn the check into a WARN_ON(), but it can
eventually just go away.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 2798804..fa99b94 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2258,8 +2258,8 @@
int ret = 0;
dout("%s called\n", __func__);
- if (!device_is_registered(&rbd_dev->dev))
- return 0;
+ if (WARN_ON(!device_is_registered(&rbd_dev->dev)))
+ return -EIO;
list_for_each_entry(snap, &rbd_dev->snaps, node) {
if (!rbd_snap_registered(snap)) {