From 1267ef3902112424b2daf361daa7f3f883632ea9 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 18 Jan 2016 21:49:36 +0530
Subject: [PATCH] Small performance improvement

---
 src/calibre/devices/winusb.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/devices/winusb.py b/src/calibre/devices/winusb.py
index e1494fd53c..f1502e38e1 100644
--- a/src/calibre/devices/winusb.py
+++ b/src/calibre/devices/winusb.py
@@ -819,7 +819,7 @@ def get_usb_info(usbdev, debug=False):  # {{{
             break
     else:
         return ans
-    for devlist, devinfo, devpath in DeviceSet(guid=GUID_DEVINTERFACE_USB_DEVICE).interfaces(yield_devlist=True):
+    for devlist, devinfo in DeviceSet(guid=GUID_DEVINTERFACE_USB_DEVICE).devices():
         if devinfo.DevInst == usbdev.devinst:
             device_port = get_device_registry_property(devlist, byref(devinfo), SPDRP_ADDRESS)[1]
             break