USB: allow match on bInterfaceNumber

[firefly-linux-kernel-4.4.55.git] / drivers / usb / core / driver.c

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index f536aebc958e71d459f71ee5b9ae19f717a851c6..23d7bbd199a5a5c8ba670cbbfdde5a95a4560a87 100644 (file)
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -622,14 +622,15 @@ int usb_match_one_id(struct usb_interface *interface,
        if (!usb_match_device(dev, id))
                return 0;
 
-       /* The interface class, subclass, and protocol should never be
+       /* The interface class, subclass, protocol and number should never be
         * checked for a match if the device class is Vendor Specific,
         * unless the match record specifies the Vendor ID. */
        if (dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC &&
                        !(id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
                        (id->match_flags & (USB_DEVICE_ID_MATCH_INT_CLASS |
                                USB_DEVICE_ID_MATCH_INT_SUBCLASS |
-                               USB_DEVICE_ID_MATCH_INT_PROTOCOL)))
+                               USB_DEVICE_ID_MATCH_INT_PROTOCOL |
+                               USB_DEVICE_ID_MATCH_INT_NUMBER)))
                return 0;
 
        if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) &&
@@ -644,6 +645,10 @@ int usb_match_one_id(struct usb_interface *interface,
            (id->bInterfaceProtocol != intf->desc.bInterfaceProtocol))
                return 0;
 
+       if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER) &&
+           (id->bInterfaceNumber != intf->desc.bInterfaceNumber))
+               return 0;
+
        return 1;
 }
 EXPORT_SYMBOL_GPL(usb_match_one_id);