USB: refactor usb device matching and create usb_device_match

This is needed for the quirk match code.

Cc: Oliver Neukum <oliver@neukum.name>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/core/driver.c

@@ -366,19 +366,8 @@ void usb_driver_release_interface(struct usb_driver *driver,
 EXPORT_SYMBOL(usb_driver_release_interface);
 
 /* returns 0 if no match, 1 if match */
-int usb_match_one_id(struct usb_interface *interface,
-		     const struct usb_device_id *id)
+int usb_match_device(struct usb_device *dev, const struct usb_device_id *id)
 {
-	struct usb_host_interface *intf;
-	struct usb_device *dev;
-
-	/* proc_connectinfo in devio.c may call us with id == NULL. */
-	if (id == NULL)
-		return 0;
-
-	intf = interface->cur_altsetting;
-	dev = interface_to_usbdev(interface);
-
 	if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
 	    id->idVendor != le16_to_cpu(dev->descriptor.idVendor))
 		return 0;
@@ -409,6 +398,26 @@ int usb_match_one_id(struct usb_interface *interface,
 	    (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol))
 		return 0;
 
+	return 1;
+}
+
+/* returns 0 if no match, 1 if match */
+int usb_match_one_id(struct usb_interface *interface,
+		     const struct usb_device_id *id)
+{
+	struct usb_host_interface *intf;
+	struct usb_device *dev;
+
+	/* proc_connectinfo in devio.c may call us with id == NULL. */
+	if (id == NULL)
+		return 0;
+
+	intf = interface->cur_altsetting;
+	dev = interface_to_usbdev(interface);
+
+	if (!usb_match_device(dev, id))
+		return 0;
+
 	/* The interface class, subclass, and protocol should never be
 	 * checked for a match if the device class is Vendor Specific,
 	 * unless the match record specifies the Vendor ID. */

drivers/usb/core/usb.h

@@ -21,6 +21,8 @@ extern int usb_set_configuration(struct usb_device *dev, int configuration);
 
 extern void usb_kick_khubd(struct usb_device *dev);
 extern void usb_resume_root_hub(struct usb_device *dev);
+extern int usb_match_device(struct usb_device *dev,
+			    const struct usb_device_id *id);
 
 extern int  usb_hub_init(void);
 extern void usb_hub_cleanup(void);