Patch "rtlwifi: rtl8192cu: Fix kernel deadlock" has been added to the 4.0-stable tree

Patch "rtlwifi: rtl8192cu: Fix kernel deadlock" has been added to the 4.0-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    rtlwifi: rtl8192cu: Fix kernel deadlock

to the 4.0-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rtlwifi-rtl8192cu-fix-kernel-deadlock.patch
and it can be found in the queue-4.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 414b7e3b9ce8b0577f613e656fdbc36b34b444dd Mon Sep 17 00:00:00 2001
From: Larry Finger <Larry.Finger@lwfinger.net>
Date: Fri, 24 Apr 2015 11:03:37 -0500
Subject: rtlwifi: rtl8192cu: Fix kernel deadlock

From: Larry Finger <Larry.Finger@lwfinger.net>

commit 414b7e3b9ce8b0577f613e656fdbc36b34b444dd upstream.

The USB mini-driver in rtlwifi, which is used by rtl8192cu, issues a call to
usb_control_msg() with a timeout value of 0. In some instances where the
interface is shutting down, this infinite wait results in a CPU deadlock. A
one second timeout fixes this problem without affecting any normal operations.

This bug is reported at https://bugzilla.novell.com/show_bug.cgi?id=927786.

Reported-by: Bernhard Wiedemann <bwiedemann@suse.com>
Tested-by: Bernhard Wiedemann <bwiedemann@suse.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Bernhard Wiedemann <bwiedemann@suse.com>
Cc: Takashi Iwai<tiwai@suse.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/rtlwifi/usb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/wireless/rtlwifi/usb.c
+++ b/drivers/net/wireless/rtlwifi/usb.c
@@ -126,7 +126,7 @@ static int _usbctrl_vendorreq_sync_read(
 
 	do {
 		status = usb_control_msg(udev, pipe, request, reqtype, value,
-					 index, pdata, len, 0); /*max. timeout*/
+					 index, pdata, len, 1000);
 		if (status < 0) {
 			/* firmware download is checksumed, don't retry */
 			if ((value >= FW_8192C_START_ADDRESS &&


Patches currently in stable-queue which might be from Larry.Finger@lwfinger.net are

queue-4.0/rt2x00-add-new-rt2800usb-device-dwa-130.patch
queue-4.0/rtlwifi-rtl8192cu-fix-kernel-deadlock.patch