Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 414b7e3b authored by Larry Finger's avatar Larry Finger Committed by Kalle Valo
Browse files

rtlwifi: rtl8192cu: Fix kernel deadlock 

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: default avatarBernhard Wiedemann <bwiedemann@suse.com>
Tested-by: default avatarBernhard Wiedemann <bwiedemann@suse.com>
Signed-off-by: default avatarLarry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Cc: Bernhard Wiedemann <bwiedemann@suse.com>
Cc: Takashi Iwai<tiwai@suse.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent 39376ccb

drivers/net/wireless/rtlwifi/usb.c

+1 −1
Original line number Diff line number Diff line
@@ -126,7 +126,7 @@ static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request, 


	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 &&