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path: root/drivers/usb/core/usb.c
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Diffstat (limited to 'drivers/usb/core/usb.c')
-rw-r--r--drivers/usb/core/usb.c23
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 043fa833eec..2fb42043b30 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -167,18 +167,23 @@ struct usb_host_interface *usb_altnum_to_altsetting(
}
EXPORT_SYMBOL_GPL(usb_altnum_to_altsetting);
+struct find_interface_arg {
+ int minor;
+ struct device_driver *drv;
+};
+
static int __find_interface(struct device *dev, void *data)
{
- int *minor = data;
+ struct find_interface_arg *arg = data;
struct usb_interface *intf;
if (!is_usb_interface(dev))
return 0;
+ if (dev->driver != arg->drv)
+ return 0;
intf = to_usb_interface(dev);
- if (intf->minor != -1 && intf->minor == *minor)
- return 1;
- return 0;
+ return intf->minor == arg->minor;
}
/**
@@ -187,14 +192,18 @@ static int __find_interface(struct device *dev, void *data)
* @minor: the minor number of the desired device
*
* This walks the bus device list and returns a pointer to the interface
- * with the matching minor. Note, this only works for devices that share the
- * USB major number.
+ * with the matching minor and driver. Note, this only works for devices
+ * that share the USB major number.
*/
struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor)
{
+ struct find_interface_arg argb;
struct device *dev;
- dev = bus_find_device(&usb_bus_type, NULL, &minor, __find_interface);
+ argb.minor = minor;
+ argb.drv = &drv->drvwrap.driver;
+
+ dev = bus_find_device(&usb_bus_type, NULL, &argb, __find_interface);
/* Drop reference count from bus_find_device */
put_device(dev);