From 8ca1358bd9b1c7a98c8f3210c1aaa2577975a389 Mon Sep 17 00:00:00 2001
From: Mathias Nyman <mathias.nyman@linux.intel.com>
Date: Wed, 16 Aug 2017 14:23:24 +0300
Subject: [PATCH] xhci: add port status tracing
Git-commit: 8ca1358bd9b1c7a98c8f3210c1aaa2577975a389
Patch-mainline: v4.14-rc1
References: FATE#325103
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>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
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 52a66506b905..a9443651ce0f 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 8ce96de10e8a..f20753b99624 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -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 */
--
2.16.4