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xhci: add trace for debug messages related to endpoint reset 

This patch defines a new trace event, which is called xhci_dbg_reset_ep
and belongs in the event class xhci_log_msg, and adds tracepoints that
trace the debug messages associated with resetting an endpoint after
the reception of a STALL packet.

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
This commit is contained in:
Xenia Ragiadakou 2013-08-06 07:52:46 +03:00 committed by Sarah Sharp
parent 4bdfe4c38f
commit a0254324ee
3 changed files with 18 additions and 7 deletions
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3
drivers/usb/host/xhci-ring.c
View File

@ -1151,7 +1151,8 @@ static void handle_reset_ep_completion(struct xhci_hcd *xhci,
/* This command will only fail if the endpoint wasn't halted,
* but we don't care.
*/
xhci_dbg(xhci, "Ignoring reset ep completion code of %u\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
"Ignoring reset ep completion code of %u",
GET_COMP_CODE(le32_to_cpu(event->status)));
/* HW with the reset endpoint quirk needs to have a configure endpoint

5
drivers/usb/host/xhci-trace.h
View File

@ -46,6 +46,11 @@ DEFINE_EVENT(xhci_log_msg, xhci_dbg_quirks,
TP_ARGS(vaf)
);
DEFINE_EVENT(xhci_log_msg, xhci_dbg_reset_ep,
TP_PROTO(struct va_format *vaf),
TP_ARGS(vaf)
);
#endif /* __XHCI_TRACE_H */
/* this part must be outside header guard */

17
drivers/usb/host/xhci.c
View File

@ -2818,7 +2818,8 @@ void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci,
struct xhci_dequeue_state deq_state;
struct xhci_virt_ep *ep;
xhci_dbg(xhci, "Cleaning up stalled endpoint ring\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
"Cleaning up stalled endpoint ring");
ep = &xhci->devs[udev->slot_id]->eps[ep_index];
/* We need to move the HW's dequeue pointer past this TD,
* or it will attempt to resend it on the next doorbell ring.
@ -2831,7 +2832,8 @@ void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci,
* issue a configure endpoint command later.
*/
if (!(xhci->quirks & XHCI_RESET_EP_QUIRK)) {
xhci_dbg(xhci, "Queueing new dequeue state\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
"Queueing new dequeue state");
xhci_queue_new_dequeue_state(xhci, udev->slot_id,
ep_index, ep->stopped_stream, &deq_state);
} else {
@ -2874,16 +2876,19 @@ void xhci_endpoint_reset(struct usb_hcd *hcd,
ep_index = xhci_get_endpoint_index(&ep->desc);
virt_ep = &xhci->devs[udev->slot_id]->eps[ep_index];
if (!virt_ep->stopped_td) {
xhci_dbg(xhci, "Endpoint 0x%x not halted, refusing to reset.\n",
ep->desc.bEndpointAddress);
xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
"Endpoint 0x%x not halted, refusing to reset.",
ep->desc.bEndpointAddress);
return;
}
if (usb_endpoint_xfer_control(&ep->desc)) {
xhci_dbg(xhci, "Control endpoint stall already handled.\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
"Control endpoint stall already handled.");
return;
}
xhci_dbg(xhci, "Queueing reset endpoint command\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
"Queueing reset endpoint command");
spin_lock_irqsave(&xhci->lock, flags);
ret = xhci_queue_reset_ep(xhci, udev->slot_id, ep_index);
/*