diff options
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index c8260cbdf94..d0960812a47 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -511,6 +511,9 @@ static void reset_ep(struct usb_device *udev, int ep_index) printf("Resetting EP %d...\n", ep_index); xhci_queue_command(ctrl, 0, udev->slot_id, ep_index, TRB_RESET_EP); event = xhci_wait_for_event(ctrl, TRB_COMPLETION); + if (!event) + return; + field = le32_to_cpu(event->trans_event.flags); BUG_ON(TRB_TO_SLOT_ID(field) != udev->slot_id); xhci_acknowledge_event(ctrl); @@ -519,6 +522,9 @@ static void reset_ep(struct usb_device *udev, int ep_index) (void *)((uintptr_t)ring->enqueue | ring->cycle_state)); xhci_queue_command(ctrl, addr, udev->slot_id, ep_index, TRB_SET_DEQ); event = xhci_wait_for_event(ctrl, TRB_COMPLETION); + if (!event) + return; + BUG_ON(TRB_TO_SLOT_ID(le32_to_cpu(event->event_cmd.flags)) != udev->slot_id || GET_COMP_CODE(le32_to_cpu( event->event_cmd.status)) != COMP_SUCCESS); @@ -544,6 +550,9 @@ static void abort_td(struct usb_device *udev, int ep_index) xhci_queue_command(ctrl, 0, 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); @@ -552,6 +561,9 @@ static void abort_td(struct usb_device *udev, int ep_index) xhci_acknowledge_event(ctrl); event = xhci_wait_for_event(ctrl, TRB_COMPLETION); + if (!event) + return; + BUG_ON(TRB_TO_SLOT_ID(le32_to_cpu(event->event_cmd.flags)) != udev->slot_id || GET_COMP_CODE(le32_to_cpu( event->event_cmd.status)) != COMP_SUCCESS); @@ -561,6 +573,9 @@ static void abort_td(struct usb_device *udev, int ep_index) (void *)((uintptr_t)ring->enqueue | ring->cycle_state)); xhci_queue_command(ctrl, addr, udev->slot_id, ep_index, TRB_SET_DEQ); event = xhci_wait_for_event(ctrl, TRB_COMPLETION); + if (!event) + return; + BUG_ON(TRB_TO_SLOT_ID(le32_to_cpu(event->event_cmd.flags)) != udev->slot_id || GET_COMP_CODE(le32_to_cpu( event->event_cmd.status)) != COMP_SUCCESS); |