diff options
| -rw-r--r-- | drivers/usb/core/usb.c | 41 |
1 files changed, 23 insertions, 18 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 25cf7e9eccf..4453cce7eb2 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -462,6 +462,25 @@ usb_match_id(struct usb_interface *interface, const struct usb_device_id *id) return NULL; } + +static int __find_interface(struct device * dev, void * data) +{ + struct usb_interface ** ret = (struct usb_interface **)data; + struct usb_interface * intf = *ret; + int *minor = (int *)data; + + /* can't look at usb devices, only interfaces */ + if (dev->driver == &usb_generic_driver) + return 0; + + intf = to_usb_interface(dev); + if (intf->minor != -1 && intf->minor == *minor) { + *ret = intf; + return 1; + } + return 0; +} + /** * usb_find_interface - find usb_interface pointer for driver and device * @drv: the driver whose current configuration is considered @@ -473,26 +492,12 @@ usb_match_id(struct usb_interface *interface, const struct usb_device_id *id) */ struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor) { - struct list_head *entry; - struct device *dev; - struct usb_interface *intf; - - list_for_each(entry, &drv->driver.devices) { - dev = container_of(entry, struct device, driver_list); + struct usb_interface *intf = (struct usb_interface *)minor; + int ret; - /* can't look at usb devices, only interfaces */ - if (dev->driver == &usb_generic_driver) - continue; - - intf = to_usb_interface(dev); - if (intf->minor == -1) - continue; - if (intf->minor == minor) - return intf; - } + ret = driver_for_each_device(&drv->driver, NULL, &intf, __find_interface); - /* no device found that matches */ - return NULL; + return ret ? intf : NULL; } static int usb_device_match (struct device *dev, struct device_driver *drv) |