usb_id: fix NULL string usage

diff --git a/extras/usb_id/usb_id.c b/extras/usb_id/usb_id.c
index 92c5f479c3f585cd1712c2e1c05b3ecedff5e017..9ce0cdbe13d54e8ec9a46f183d675a70fb91ab70 100644 (file)
--- a/extras/usb_id/usb_id.c
+++ b/extras/usb_id/usb_id.c
@@ -266,7 +266,7 @@ static int usb_id(struct udev_device *dev)
        dbg(udev, "syspath %s\n", udev_device_get_syspath(dev));
 
        /* shortcut if we are called for a usb_device */
-       if (strcmp(udev_device_get_devtype(dev), "usb_device") == 0) {
+       if (udev_device_get_devtype(dev) != NULL && strcmp(udev_device_get_devtype(dev), "usb_device") == 0) {
                dev_if_packed_info(dev, packed_if_str, sizeof(packed_if_str));
                dev_usb = dev;
                goto fallback;