usb: Remove unnecessary portnr lookup from usb_new_device

If the device has a parent, it is instantiated from usb_hub_port_connect_change
and the portnr is right there in dev->portnr, so there is no need for this
whole dance to look it up.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>

common/usb.c

@@ -927,7 +927,6 @@ int usb_new_device(struct usb_device *dev)
 	 * thread_id=5729457&forum_id=5398
 	 */
 	__maybe_unused struct usb_device_descriptor *desc;
-	int port = -1;
 	struct usb_device *parent = dev->parent;
 	unsigned short portstatus;
 
@@ -965,24 +964,10 @@ int usb_new_device(struct usb_device *dev)
 #endif
 
 	if (parent) {
-		int j;
-
-		/* find the port number we're at */
-		for (j = 0; j < parent->maxchild; j++) {
-			if (parent->children[j] == dev) {
-				port = j;
-				break;
-			}
-		}
-		if (port < 0) {
-			printf("usb_new_device:cannot locate device's port.\n");
-			return 1;
-		}
-
 		/* reset the port for the second time */
-		err = hub_port_reset(dev->parent, port, &portstatus);
+		err = hub_port_reset(dev->parent, dev->portnr - 1, &portstatus);
 		if (err < 0) {
-			printf("\n     Couldn't reset port %i\n", port);
+			printf("\n     Couldn't reset port %i\n", dev->portnr);
 			return 1;
 		}
 	}