usb: xhci: add endpoint context tracing when an endpoint is added

The configure endpoint command configures all the endpoints that were
flagged to be added or dropped.

To know the content of each of the added endpoints we need to add tracing
to the .add_endpoint() callback, just after initializing all the context
values.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-trace.h

@@ -366,6 +366,11 @@ DEFINE_EVENT(xhci_log_ep_ctx, xhci_handle_cmd_config_ep,
 	TP_ARGS(ctx)
 );
 
+DEFINE_EVENT(xhci_log_ep_ctx, xhci_add_endpoint,
+	TP_PROTO(struct xhci_ep_ctx *ctx),
+	TP_ARGS(ctx)
+);
+
 DECLARE_EVENT_CLASS(xhci_log_slot_ctx,
 	TP_PROTO(struct xhci_slot_ctx *ctx),
 	TP_ARGS(ctx),

drivers/usb/host/xhci.c

@@ -1807,6 +1807,7 @@ static int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
 	struct xhci_container_ctx *in_ctx;
 	unsigned int ep_index;
 	struct xhci_input_control_ctx *ctrl_ctx;
+	struct xhci_ep_ctx *ep_ctx;
 	u32 added_ctxs;
 	u32 new_add_flags, new_drop_flags;
 	struct xhci_virt_device *virt_dev;
@@ -1897,6 +1898,9 @@ static int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
 	/* Store the usb_device pointer for later use */
 	ep->hcpriv = udev;
 
+	ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
+	trace_xhci_add_endpoint(ep_ctx);
+
 	xhci_debugfs_create_endpoint(xhci, virt_dev, ep_index);
 
 	xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x\n",