rbd: drop dev registration check for new snap
authorAlex Elder <elder@inktank.com>
Fri, 31 Aug 2012 22:29:53 +0000 (17:29 -0500)
committerAlex Elder <elder@inktank.com>
Mon, 1 Oct 2012 19:30:52 +0000 (14:30 -0500)
commit86ff77bb68c6cda783b195a260f68fd5d32f7aaf
tree38c0f281df6e578171d39ad70d093afd10390dc7
parent0f308a3188b37f36bc5a078f5fe039a41714476e
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>
drivers/block/rbd.c