[CIFS] Allow cifsd to suspend if connection is lost

Make cifsd allow us to suspend if it has lost the connection with a server

Ref: http://bugzilla.kernel.org/show_bug.cgi?id=6811

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Steve French <sfrench@us.ibm.com>
(cherry picked from 27bd6cd87b0ada66515ad49bc346d77d1e9d3e05 commit)

fs/cifs/connect.c

@@ -182,6 +182,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 
 	while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
 	{
+		try_to_freeze();
 		if(server->protocolType == IPV6) {
 			rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
 		} else {