tree 38c0f281df6e578171d39ad70d093afd10390dc7
parent 0f308a3188b37f36bc5a078f5fe039a41714476e
author Alex Elder <elder@inktank.com> 1346452193 -0500
committer Alex Elder <elder@inktank.com> 1349119852 -0500

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>