[CIFS] Fix hang in mount when negprot causes server to kill tcp session

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/CHANGES

@@ -2,6 +2,11 @@ Version 1.53
 ------------
 DFS support added (Microsoft Distributed File System client support needed
 for referrals which enable a hierarchical name space among servers).
+Disable temporary caching of mode bits to servers which do not support
+storing of mode (e.g. Windows servers, when client mounts without cifsacl
+mount option) and add new "dynperm" mount option to enable temporary caching
+of mode (enable old behavior).  Fix hang on mount caused when server crashes
+tcp session during negotiate protocol.
 
 Version 1.52
 ------------

fs/cifs/connect.c

@@ -653,6 +653,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 	spin_lock(&GlobalMid_Lock);
 	server->tcpStatus = CifsExiting;
 	spin_unlock(&GlobalMid_Lock);
+	wake_up_all(&server->response_q);
 
 	/* don't exit until kthread_stop is called */
 	set_current_state(TASK_UNINTERRUPTIBLE);