[ 3.5.y.z extended stable ] Patch "staging: vt6656: [BUG] main_usb.c oops on device_close move" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    staging: vt6656: [BUG] main_usb.c oops on device_close move

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 14c403aee6eb1de9c5b96f40b10446851d978aa6 Mon Sep 17 00:00:00 2001
From: Malcolm Priestley <tvboxspy at gmail.com>
Date: Sun, 22 Sep 2013 19:48:54 +0100
Subject: [PATCH] staging: vt6656: [BUG] main_usb.c oops on device_close move
 flag earlier.

commit e3eb270fab7734427dd8171a93e4946fe28674bc upstream.

The vt6656 is prone to resetting on the usb bus.

It seems there is a race condition and wpa supplicant is
trying to open the device via iw_handlers before its actually
closed at a stage that the buffers are being removed.

The device is longer considered open when the
buffers are being removed. So move ~DEVICE_FLAGS_OPENED
flag to before freeing the device buffers.

Signed-off-by: Malcolm Priestley <tvboxspy at gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/staging/vt6656/main_usb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/vt6656/main_usb.c b/drivers/staging/vt6656/main_usb.c
index fa6dbe0..c829863 100644
--- a/drivers/staging/vt6656/main_usb.c
+++ b/drivers/staging/vt6656/main_usb.c
@@ -1220,6 +1220,8 @@ device_release_WPADEV(pDevice);
     memset(pMgmt->abyCurrBSSID, 0, 6);
     pMgmt->eCurrState = WMAC_STATE_IDLE;

+	pDevice->flags &= ~DEVICE_FLAGS_OPENED;
+
     device_free_tx_bufs(pDevice);
     device_free_rx_bufs(pDevice);
     device_free_int_bufs(pDevice);
@@ -1231,7 +1233,6 @@ device_release_WPADEV(pDevice);
     usb_free_urb(pDevice->pInterruptURB);

     BSSvClearNodeDBTable(pDevice, 0);
-    pDevice->flags &=(~DEVICE_FLAGS_OPENED);

     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "device_close2 \n");

--
1.8.3.2