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@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-ring.c | 2 ++
drivers/usb/host/xhci-trace.h | 23 +++++++++++++++++++++++
2 files changed, 25 insertions(+)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 52a6650..a944365 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -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);
diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index 8ce96de..f20753b 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -453,6 +453,29 @@
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 */
--
1.9.1
--
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