CIFS: Return -EAGAIN instead of -ENOTSOCK

When we attempt to send a packet while the demultiplex thread
is in the middle of cifs_reconnect() we may end up returning
-ENOTSOCK to upper layers. The intent here is to retry the request
once the TCP connection is up, so change it to return -EAGAIN
instead. The latter error code is retryable and the upper layers
will retry the request if needed.
Signed-off-by: NPavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: NSteve French <stfrench@microsoft.com>

fs/cifs/transport.c

@@ -301,8 +301,9 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
 		rc = smbd_send(server, rqst);
 		goto smbd_done;
 	}
+
 	if (ssocket == NULL)
-		return -ENOTSOCK;
+		return -EAGAIN;
 
 	/* cork the socket */
 	kernel_setsockopt(ssocket, SOL_TCP, TCP_CORK,