NFSv4: Clean up nfs4_lock_delegation_recall

All error cases are handled by the switch() statement, meaning that the
call to nfs4_handle_exception() is unreachable.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/nfs4proc.c

@@ -5144,13 +5144,11 @@ nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
 {
 	struct nfs_server *server = NFS_SERVER(state->inode);
-	struct nfs4_exception exception = { };
 	int err;
 
 	err = nfs4_set_lock_state(state, fl);
 	if (err != 0)
 		goto out;
-	do {
 	err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
 	switch (err) {
 		default:
@@ -5164,8 +5162,7 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
 			set_bit(NFS_DELEGATED_STATE, &state->flags);
 		case -NFS4ERR_EXPIRED:
 			nfs4_schedule_lease_recovery(server->nfs_client);
-				err = -EAGAIN;
-				goto out;
+			return -EAGAIN;
 		case -NFS4ERR_BADSESSION:
 		case -NFS4ERR_BADSLOT:
 		case -NFS4ERR_BAD_HIGH_SLOT:
@@ -5173,30 +5170,23 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
 		case -NFS4ERR_DEADSESSION:
 			set_bit(NFS_DELEGATED_STATE, &state->flags);
 			nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
-				err = -EAGAIN;
-				goto out;
+			return -EAGAIN;
 		case -NFS4ERR_DELEG_REVOKED:
 		case -NFS4ERR_ADMIN_REVOKED:
 		case -NFS4ERR_BAD_STATEID:
 		case -NFS4ERR_OPENMODE:
 			nfs4_schedule_stateid_recovery(server, state);
-				err = 0;
-				goto out;
+			return 0;
 		case -NFS4ERR_DELAY:
 		case -NFS4ERR_GRACE:
 			set_bit(NFS_DELEGATED_STATE, &state->flags);
 			ssleep(1);
-				err = -EAGAIN;
-				goto out;
+			return -EAGAIN;
 		case -ENOMEM:
 		case -NFS4ERR_DENIED:
 			/* kill_proc(fl->fl_pid, SIGLOST, 1); */
-				err = 0;
-				goto out;
+			return 0;
 	}
-		set_bit(NFS_DELEGATED_STATE, &state->flags);
-		err = nfs4_handle_exception(server, err, &exception);
-	} while (exception.retry);
 out:
 	return err;
 }