diff options
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 35bd5cd29e..0bc44752be 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -499,6 +499,8 @@ static void abort_td(struct usb_device *udev, int ep_index) xhci_queue_command(ctrl, NULL, udev->slot_id, ep_index, TRB_STOP_RING); event = xhci_wait_for_event(ctrl, TRB_TRANSFER); + if (!event) + return; field = le32_to_cpu(event->trans_event.flags); BUG_ON(TRB_TO_SLOT_ID(field) != udev->slot_id); BUG_ON(TRB_TO_EP_INDEX(field) != ep_index); |