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Commit 5d9c7206 authored by Jeff Layton's avatar Jeff Layton Committed by Steve French
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[CIFS] Do not allow signals in cifs_demultiplex_thread 



Switch from send_sig to force_sig and do not allow signal for this
background thread (the signal is needed to wakeup the thread when
blocked in the network stack).

Signed-off-by: default avatarJeff Layton <jlayton@readhat.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent ffdd6e4d

fs/cifs/connect.c

+7 −6
Original line number Diff line number Diff line
@@ -348,7 +348,6 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server) 
	int isMultiRsp;

	int reconnect;



	allow_signal(SIGKILL);

	current->flags |= PF_MEMALLOC;

	server->tsk = current;	/* save process info to wake at shutdown */

	cFYI(1, ("Demultiplex PID: %d", current->pid));
@@ -2089,7 +2088,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb, 
				   always wake up processes blocked in

				   tcp in recv_mesg then we could remove the

				   send_sig call */

				send_sig(SIGKILL,srvTcp->tsk,1);

				force_sig(SIGKILL,srvTcp->tsk);

				tsk = srvTcp->tsk;

				if(tsk)

					kthread_stop(tsk);
@@ -2106,9 +2105,11 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb, 
					temp_rc = CIFSSMBLogoff(xid, pSesInfo);

					/* if the socketUseCount is now zero */

					if ((temp_rc == -ESHUTDOWN) &&

					   (pSesInfo->server) && (pSesInfo->server->tsk)) {

					    (pSesInfo->server) && 

					    (pSesInfo->server->tsk)) {

						struct task_struct *tsk;

						send_sig(SIGKILL,pSesInfo->server->tsk,1);

						force_sig(SIGKILL,

							pSesInfo->server->tsk);

						tsk = pSesInfo->server->tsk;

						if (tsk)

							kthread_stop(tsk);
@@ -3364,9 +3365,9 @@ cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb) 
				FreeXid(xid);

				return 0;

			} else if (rc == -ESHUTDOWN) {

				cFYI(1,("Waking up socket by sending it signal"));

				cFYI(1,("Waking up socket by sending signal"));

				if (cifsd_task) {

					send_sig(SIGKILL,cifsd_task,1);

					force_sig(SIGKILL,cifsd_task);

					kthread_stop(cifsd_task);

				}

				rc = 0;