Commit 7b813767 authored by Alexandru M Stan's avatar Alexandru M Stan Committed by Greg Kroah-Hartman
Browse files

usb: dwc2: Fix NULL qh in dwc2_queue_transaction 



When a usb device disconnects in a certain way, dwc2_queue_transaction
still gets called after dwc2_hcd_cleanup_channels.

dwc2_hcd_cleanup_channels does "channel->qh = NULL;" but
dwc2_queue_transaction still wants to dereference qh.
This adds a check for a null qh.

Acked-by: default avatarMinas Harutyunyan <hminas@synopsys.com>
Signed-off-by: default avatarAlexandru M Stan <amstan@chromium.org>
[dianders: rebased to mainline]
Signed-off-by: default avatarDouglas Anderson <dianders@chromium.org>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6070636c

drivers/usb/dwc2/hcd.c

+1 −1
Original line number Diff line number Diff line
@@ -2824,7 +2824,7 @@ static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg, 
		list_move_tail(&chan->split_order_list_entry,

			       &hsotg->split_order);



	if (hsotg->params.host_dma) {

	if (hsotg->params.host_dma && chan->qh) {

		if (hsotg->params.dma_desc_enable) {

			if (!chan->xfer_started ||

			    chan->ep_type == USB_ENDPOINT_XFER_ISOC) {