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xhci: Add additional dynamic debug to follow URBs in cancel and error cases.
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> Link: https://lore.kernel.org/r/20210820123503.2605901-6-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
2847c46c61
commit
0d9b9f533b
1 changed files with 24 additions and 6 deletions
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@ -830,9 +830,14 @@ static void xhci_giveback_invalidated_tds(struct xhci_virt_ep *ep)
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ring = xhci_urb_to_transfer_ring(ep->xhci, td->urb);
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if (td->cancel_status == TD_CLEARED)
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if (td->cancel_status == TD_CLEARED) {
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xhci_dbg(ep->xhci, "%s: Giveback cancelled URB %p TD\n",
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__func__, td->urb);
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xhci_td_cleanup(ep->xhci, td, ring, td->status);
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} else {
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xhci_dbg(ep->xhci, "%s: Keep cancelled URB %p TD as cancel_status is %d\n",
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__func__, td->urb, td->cancel_status);
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}
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if (ep->xhci->xhc_state & XHCI_STATE_DYING)
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return;
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}
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@ -850,6 +855,10 @@ static int xhci_reset_halted_ep(struct xhci_hcd *xhci, unsigned int slot_id,
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goto done;
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}
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xhci_dbg(xhci, "%s-reset ep %u, slot %u\n",
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(reset_type == EP_HARD_RESET) ? "Hard" : "Soft",
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ep_index, slot_id);
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ret = xhci_queue_reset_ep(xhci, command, slot_id, ep_index, reset_type);
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done:
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if (ret)
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@ -883,7 +892,8 @@ static int xhci_handle_halted_endpoint(struct xhci_hcd *xhci,
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}
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if (ep->ep_state & EP_HALTED) {
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xhci_dbg(xhci, "Reset ep command already pending\n");
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xhci_dbg(xhci, "Reset ep command for ep_index %d already pending\n",
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ep->ep_index);
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return 0;
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}
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@ -922,9 +932,10 @@ static int xhci_invalidate_cancelled_tds(struct xhci_virt_ep *ep)
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list_for_each_entry_safe(td, tmp_td, &ep->cancelled_td_list, cancelled_td_list) {
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xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
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"Removing canceled TD starting at 0x%llx (dma).",
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"Removing canceled TD starting at 0x%llx (dma) in stream %u URB %p",
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(unsigned long long)xhci_trb_virt_to_dma(
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td->start_seg, td->first_trb));
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td->start_seg, td->first_trb),
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td->urb->stream_id, td->urb);
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list_del_init(&td->td_list);
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ring = xhci_urb_to_transfer_ring(xhci, td->urb);
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if (!ring) {
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@ -1079,6 +1090,8 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
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return;
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case EP_STATE_RUNNING:
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/* Race, HW handled stop ep cmd before ep was running */
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xhci_dbg(xhci, "Stop ep completion ctx error, ep is running\n");
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command = xhci_alloc_command(xhci, false, GFP_ATOMIC);
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if (!command)
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xhci_stop_watchdog_timer_in_irq(xhci, ep);
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@ -1400,7 +1413,12 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
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ep_ring = xhci_urb_to_transfer_ring(ep->xhci, td->urb);
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if (td->cancel_status == TD_CLEARING_CACHE) {
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td->cancel_status = TD_CLEARED;
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xhci_dbg(ep->xhci, "%s: Giveback cancelled URB %p TD\n",
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__func__, td->urb);
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xhci_td_cleanup(ep->xhci, td, ep_ring, td->status);
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} else {
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xhci_dbg(ep->xhci, "%s: Keep cancelled URB %p TD as cancel_status is %d\n",
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__func__, td->urb, td->cancel_status);
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}
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}
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cleanup:
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