diff options
Diffstat (limited to 'drivers/usb/core/usb.c')
| -rw-r--r-- | drivers/usb/core/usb.c | 23 |
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); |