rbd: plug rbd_dev->header.object_prefix memory leak
authorIlya Dryomov <idryomov@gmail.com>
Mon, 31 Aug 2015 15:22:10 +0000 (18:22 +0300)
committerIlya Dryomov <idryomov@gmail.com>
Tue, 8 Sep 2015 20:14:30 +0000 (23:14 +0300)
Need to free object_prefix when rbd_dev_v2_snap_context() fails, but
only if this is the first time we are reading in the header.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
drivers/block/rbd.c

Simple merge