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@xxxxxxxxxxxxxxx> know about it.
>From 414b7e3b9ce8b0577f613e656fdbc36b34b444dd Mon Sep 17 00:00:00 2001
From: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
Date: Fri, 24 Apr 2015 11:03:37 -0500
Subject: rtlwifi: rtl8192cu: Fix kernel deadlock
From: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
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@xxxxxxxx>
Tested-by: Bernhard Wiedemann <bwiedemann@xxxxxxxx>
Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
Cc: Bernhard Wiedemann <bwiedemann@xxxxxxxx>
Cc: Takashi Iwai<tiwai@xxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxxxx are
queue-4.0/rt2x00-add-new-rt2800usb-device-dwa-130.patch
queue-4.0/rtlwifi-rtl8192cu-fix-kernel-deadlock.patch
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