diff options
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 34 | ||||
| -rw-r--r-- | include/usb/xhci.h | 2 |
2 files changed, 24 insertions, 12 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index d0960812a47..d21e76e0bdb 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -466,7 +466,8 @@ union xhci_trb *xhci_wait_for_event(struct xhci_ctrl *ctrl, trb_type expected) continue; type = TRB_FIELD_TO_TYPE(le32_to_cpu(event->event_cmd.flags)); - if (type == expected) + if (type == expected || + (expected == TRB_NONE && type != TRB_PORT_STATUS)) return event; if (type == TRB_PORT_STATUS) @@ -544,27 +545,36 @@ static void abort_td(struct usb_device *udev, int ep_index) struct xhci_ctrl *ctrl = xhci_get_ctrl(udev); struct xhci_ring *ring = ctrl->devs[udev->slot_id]->eps[ep_index].ring; union xhci_trb *event; + trb_type type; u64 addr; u32 field; xhci_queue_command(ctrl, 0, udev->slot_id, ep_index, TRB_STOP_RING); - event = xhci_wait_for_event(ctrl, TRB_TRANSFER); + event = xhci_wait_for_event(ctrl, TRB_NONE); 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); - BUG_ON(GET_COMP_CODE(le32_to_cpu(event->trans_event.transfer_len - != COMP_STOP))); - xhci_acknowledge_event(ctrl); + type = TRB_FIELD_TO_TYPE(le32_to_cpu(event->event_cmd.flags)); + if (type == TRB_TRANSFER) { + 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); + BUG_ON(GET_COMP_CODE(le32_to_cpu(event->trans_event.transfer_len + != COMP_STOP))); + xhci_acknowledge_event(ctrl); - event = xhci_wait_for_event(ctrl, TRB_COMPLETION); - if (!event) - return; + event = xhci_wait_for_event(ctrl, TRB_COMPLETION); + if (!event) + return; + type = TRB_FIELD_TO_TYPE(le32_to_cpu(event->event_cmd.flags)); - BUG_ON(TRB_TO_SLOT_ID(le32_to_cpu(event->event_cmd.flags)) + } else { + printf("abort_td: Expected a TRB_TRANSFER TRB first\n"); + } + + BUG_ON(type != TRB_COMPLETION || + 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); xhci_acknowledge_event(ctrl); diff --git a/include/usb/xhci.h b/include/usb/xhci.h index 4a4ac10229a..04d16a256bb 100644 --- a/include/usb/xhci.h +++ b/include/usb/xhci.h @@ -901,6 +901,8 @@ union xhci_trb { /* TRB type IDs */ typedef enum { + /* reserved, used as a software sentinel */ + TRB_NONE = 0, /* bulk, interrupt, isoc scatter/gather, and control data stage */ TRB_NORMAL = 1, /* setup stage for control transfers */ |