commit dcdaff7e78ec4647fdaa4892dd7fdc6b470ee491
Author: Andrey Konovalov <andreyknvl@google.com>
Date:   Wed Sep 27 17:06:15 2017 +0200

    usb-fuzzer: dump usb device ids on enumeration

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 8987cec9549d..166f2b6486af 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -795,6 +795,19 @@ const struct usb_device_id *usb_match_id(struct usb_interface *interface,
 }
 EXPORT_SYMBOL_GPL(usb_match_id);
 
+void usb_device_id_dump(const struct usb_device_id *id)
+{
+	for (; id->idVendor || id->idProduct || id->bDeviceClass ||
+	       id->bInterfaceClass || id->driver_info; id++) {
+		char buffer[128];
+		int size = (char *)&id->driver_info - (char *)id;
+		bin2hex((char *)&buffer[0], (const char *)id, size);
+		buffer[size * 2] = 0;
+		pr_err("USBID: %s\n", &buffer[0]);
+	}
+}
+
+
 static int usb_device_match(struct device *dev, struct device_driver *drv)
 {
 	/* devices and interfaces are handled separately */
@@ -819,6 +832,9 @@ static int usb_device_match(struct device *dev, struct device_driver *drv)
 		intf = to_usb_interface(dev);
 		usb_drv = to_usb_driver(drv);
 
+		if (usb_drv->id_table != NULL)
+			usb_device_id_dump(usb_drv->id_table);
+
 		id = usb_match_id(intf, usb_drv->id_table);
 		if (id)
 			return 1;