cifs: smbd: Return EINTR when interrupted

When packets are waiting for outbound I/O and interrupted, return the
proper error code to user process.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/smbdirect.c

@@ -1972,7 +1972,7 @@ static int smbd_recv_buf(struct smbd_connection *info, char *buf,
 			info->transport_status != SMBD_CONNECTED);
 	/* Don't return any data if interrupted */
 	if (rc)
-		return -ENODEV;
+		return rc;
 
 	if (info->transport_status != SMBD_CONNECTED) {
 		log_read(ERR, "disconnected\n");