tree 4bd52ff7fc913c1b9bcb35e13c4df3edbb8067df
parent 5698bd757d55b1bb87edd1a9744ab09c142abfc2
author Alex Elder <elder@inktank.com> 1344629527 -0700
committer Sage Weil <sage@inktank.com> 1348285734 -0700

rbd: drop dev reference on error in rbd_open()

If a read-only rbd device is opened for writing in rbd_open(), it
returns without dropping the just-acquired device reference.

Fix this by moving the read-only check before getting the reference.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Yehuda Sadeh <yehuda@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>