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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: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Nyman 2017-08-16 14:23:24 +03:00 committed by Greg Kroah-Hartman
parent 76a0f32b28
commit 8ca1358bd9
2 changed files with 25 additions and 0 deletions
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2
drivers/usb/host/xhci-ring.c
View File

@ -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);

23
drivers/usb/host/xhci-trace.h
View File

@ -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 */