dlm: return -ENOMEM if ls_recover_buf fails

This patch fixes to return -ENOMEM in case of an allocation failure that
was forgotten to change in commit 6c648035 ("dlm: switch to use
rhashtable for rsbs").
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202404200536.jGi6052v-lkp@intel.com/
Fixes: 6c648035 ("dlm: switch to use rhashtable for rsbs")
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>

fs/dlm/lockspace.c

@@ -482,8 +482,10 @@ static int new_lockspace(const char *name, const char *cluster,
 	 * might send less.
 	 */
 	ls->ls_recover_buf = kmalloc(DLM_MAX_SOCKET_BUFSIZE, GFP_NOFS);
-	if (!ls->ls_recover_buf)
+	if (!ls->ls_recover_buf) {
+		error = -ENOMEM;
 		goto out_lkbidr;
+	}
 
 	ls->ls_slot = 0;
 	ls->ls_num_slots = 0;