[email protected], 2005-03-21 11:09:40-08:00, [email protected]
[usb] Use driver_for_each_device() instead of manually walking list.
Signed-off-by: Patrick Mochel <[email protected]>
diff -Nru a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
--- a/drivers/usb/core/usb.c 2005-03-21 12:30:37 -08:00
+++ b/drivers/usb/core/usb.c 2005-03-21 12:30:37 -08:00
@@ -469,6 +469,25 @@
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
@@ -480,26 +499,12 @@
*/
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);
-
- /* 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;
- }
+ struct usb_interface *intf = (struct usb_interface *)minor;
+ int ret;
+
+ 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)