backports: add USB_DEVICE_INTERFACE_CLASS

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/backport/backport-include/linux/usb.h b/backport/backport-include/linux/usb.h
index 08ae0f2ce76780876c02f9548660caa07c0084bd..a0cfa377b2c22c6fbdf5bee735a3acd6fe449892 100644 (file)
--- a/backport/backport-include/linux/usb.h
+++ b/backport/backport-include/linux/usb.h
@@ -53,6 +53,24 @@
        .idProduct = (prod)
 #endif /* USB_DEVICE_INTERFACE_NUMBER */
 
+#ifndef USB_DEVICE_INTERFACE_CLASS
+/**
+ * USB_DEVICE_INTERFACE_CLASS - describe a usb device with a specific interface class
+ * @vend: the 16 bit USB Vendor ID
+ * @prod: the 16 bit USB Product ID
+ * @cl: bInterfaceClass value
+ *
+ * This macro is used to create a struct usb_device_id that matches a
+ * specific interface class of devices.
+ */
+#define USB_DEVICE_INTERFACE_CLASS(vend, prod, cl) \
+       .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
+                      USB_DEVICE_ID_MATCH_INT_CLASS, \
+       .idVendor = (vend), \
+       .idProduct = (prod), \
+       .bInterfaceClass = (cl)
+#endif /* USB_DEVICE_INTERFACE_CLASS */
+
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
 #ifdef CPTCFG_BACKPORT_OPTION_USB_URB_THREAD_FIX
 #define usb_scuttle_anchored_urbs LINUX_BACKPORT(usb_scuttle_anchored_urbs)