@@ -830,9 +830,14 @@ static void xhci_giveback_invalidated_tds(struct xhci_virt_ep *ep)
ring = xhci_urb_to_transfer_ring(ep->xhci, td->urb);
- if (td->cancel_status == TD_CLEARED)
+ if (td->cancel_status == TD_CLEARED) {
+ xhci_dbg(ep->xhci, "%s: Giveback cancelled URB %p TD\n",
+ __func__, td->urb);
xhci_td_cleanup(ep->xhci, td, ring, td->status);
-
+ } else {
+ xhci_dbg(ep->xhci, "%s: Keep cancelled URB %p TD as cancel_status is %d\n",
+ __func__, td->urb, td->cancel_status);
+ }
if (ep->xhci->xhc_state & XHCI_STATE_DYING)
return;
}
@@ -850,6 +855,10 @@ static int xhci_reset_halted_ep(struct xhci_hcd *xhci, unsigned int slot_id,
goto done;
}
+ xhci_dbg(xhci, "%s-reset ep %u, slot %u\n",
+ (reset_type == EP_HARD_RESET) ? "Hard" : "Soft",
+ ep_index, slot_id);
+
ret = xhci_queue_reset_ep(xhci, command, slot_id, ep_index, reset_type);
done:
if (ret)
@@ -883,7 +892,8 @@ static int xhci_handle_halted_endpoint(struct xhci_hcd *xhci,
}
if (ep->ep_state & EP_HALTED) {
- xhci_dbg(xhci, "Reset ep command already pending\n");
+ xhci_dbg(xhci, "Reset ep command for ep_index %d already pending\n",
+ ep->ep_index);
return 0;
}
@@ -922,9 +932,10 @@ static int xhci_invalidate_cancelled_tds(struct xhci_virt_ep *ep)
list_for_each_entry_safe(td, tmp_td, &ep->cancelled_td_list, cancelled_td_list) {
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
- "Removing canceled TD starting at 0x%llx (dma).",
- (unsigned long long)xhci_trb_virt_to_dma(
- td->start_seg, td->first_trb));
+ "Removing canceled TD starting at 0x%llx (dma) in stream %u URB %p",
+ (unsigned long long)xhci_trb_virt_to_dma(
+ td->start_seg, td->first_trb),
+ td->urb->stream_id, td->urb);
list_del_init(&td->td_list);
ring = xhci_urb_to_transfer_ring(xhci, td->urb);
if (!ring) {
@@ -1079,6 +1090,8 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
return;
case EP_STATE_RUNNING:
/* Race, HW handled stop ep cmd before ep was running */
+ xhci_dbg(xhci, "Stop ep completion ctx error, ep is running\n");
+
command = xhci_alloc_command(xhci, false, GFP_ATOMIC);
if (!command)
xhci_stop_watchdog_timer_in_irq(xhci, ep);
@@ -1400,7 +1413,12 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
ep_ring = xhci_urb_to_transfer_ring(ep->xhci, td->urb);
if (td->cancel_status == TD_CLEARING_CACHE) {
td->cancel_status = TD_CLEARED;
+ xhci_dbg(ep->xhci, "%s: Giveback cancelled URB %p TD\n",
+ __func__, td->urb);
xhci_td_cleanup(ep->xhci, td, ep_ring, td->status);
+ } else {
+ xhci_dbg(ep->xhci, "%s: Keep cancelled URB %p TD as cancel_status is %d\n",
+ __func__, td->urb, td->cancel_status);
}
}
cleanup:
Add more debugging messages to follow what happends to a URB internally in special cases like URB cancel, halted endpoints and endpoint reset. Helps tracking issues like URB never given back by host. Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> --- drivers/usb/host/xhci-ring.c | 30 ++++++++++++++++++++++++------ 1 file changed, 24 insertions(+), 6 deletions(-)