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>

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index e88e877..3393ce7 100644 (file)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -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

diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index f0447c6..757b26f 100644 (file)
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -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 */

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index ffb3ed0..18c710d 100644 (file)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -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);
        /*