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Commit 8ca1358b authored by Mathias Nyman's avatar Mathias Nyman Committed by Greg Kroah-Hartman
Browse files

xhci: add port status tracing 



Track the port status in a human readble way each time we get a
port status change event

Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 76a0f32b

drivers/usb/host/xhci-ring.c

+2 −0
Original line number Diff line number Diff line
@@ -1638,6 +1638,8 @@ static void handle_port_status(struct xhci_hcd *xhci, 
			port_id);

	portsc = readl(port_array[faked_port_index]);



	trace_xhci_handle_port_status(faked_port_index, portsc);



	if (hcd->state == HC_STATE_SUSPENDED) {

		xhci_dbg(xhci, "resume root hub\n");

		usb_hcd_resume_root_hub(hcd);

drivers/usb/host/xhci-trace.h

+23 −0
Original line number Diff line number Diff line
@@ -453,6 +453,29 @@ DEFINE_EVENT(xhci_log_ring, xhci_inc_deq, 
	TP_PROTO(struct xhci_ring *ring),

	TP_ARGS(ring)

);



DECLARE_EVENT_CLASS(xhci_log_portsc,

		    TP_PROTO(u32 portnum, u32 portsc),

		    TP_ARGS(portnum, portsc),

		    TP_STRUCT__entry(

				     __field(u32, portnum)

				     __field(u32, portsc)

				     ),

		    TP_fast_assign(

				   __entry->portnum = portnum;

				   __entry->portsc = portsc;

				   ),

		    TP_printk("port-%d: %s",

			      __entry->portnum,

			      xhci_decode_portsc(__entry->portsc)

			      )

);



DEFINE_EVENT(xhci_log_portsc, xhci_handle_port_status,

	     TP_PROTO(u32 portnum, u32 portsc),

	     TP_ARGS(portnum, portsc)

);



#endif /* __XHCI_TRACE_H */



/* this part must be outside header guard */