usb-hub: add tracepoint for status reports

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

hw/usb/dev-hub.c

@@ -475,6 +475,7 @@ static void usb_hub_handle_data(USBDevice *dev, USBPacket *p)
                 port->wPortChange_reported = port->wPortChange;
             }
             if (status != 0) {
+                trace_usb_hub_status_report(s->dev.addr, status);
                 for(i = 0; i < n; i++) {
                     buf[i] = status >> (8 * i);
                 }

trace-events

@@ -411,6 +411,7 @@ usb_hub_set_port_feature(int addr, int nr, const char *f) "dev %d, port %d, feat
 usb_hub_clear_port_feature(int addr, int nr, const char *f) "dev %d, port %d, feature %s"
 usb_hub_attach(int addr, int nr) "dev %d, port %d"
 usb_hub_detach(int addr, int nr) "dev %d, port %d"
+usb_hub_status_report(int addr, int status) "dev %d, status 0x%x"
 
 # hw/usb/dev-uas.c
 usb_uas_reset(int addr) "dev %d"