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

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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@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Malcolm Priestley 2013-09-22 19:48:54 +01:00 committed by Greg Kroah-Hartman
parent 18e35e081e
commit e3eb270fab
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/vt6656/main_usb.c
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@ -1098,6 +1098,8 @@ static int device_close(struct net_device *dev)
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);
@ -1109,7 +1111,6 @@ static int device_close(struct net_device *dev)
usb_free_urb(pDevice->pInterruptURB);
BSSvClearNodeDBTable(pDevice, 0);
pDevice->flags &=(~DEVICE_FLAGS_OPENED);
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "device_close2 \n");