If we fail to prepare our pages for whatever reason (out of memory in
our case) we need to make sure to drop the block_group->data_rwsem,
otherwise hilarity ensues.
Signed-off-by: NJosef Bacik <jbacik@fb.com>
Reviewed-by: NOmar Sandoval <osandov@fb.com>
Reviewed-by: NLiu Bo <bo.li.liu@oracle.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
[ add label and use existing unlocking code ]
Signed-off-by: NDavid Sterba <dsterba@suse.com>