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.
Signed-off-by: Alexandru M Stan <amstan at chromium.org>
---
drivers/usb/dwc2/hcd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index f845c41..d745128 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -1004,7 +1004,7 @@ static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg,
{
int retval = 0;
- if (hsotg->core_params->dma_enable > 0) {
+ if (hsotg->core_params->dma_enable > 0 && chan->qh) {
if (hsotg->core_params->dma_desc_enable > 0) {
if (!chan->xfer_started ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
--
2.6.0.rc0.131.gf624c3d
