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path: root/drivers/usb/atm/usbatm.h
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Diffstat (limited to 'drivers/usb/atm/usbatm.h')
-rw-r--r--drivers/usb/atm/usbatm.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/usb/atm/usbatm.h b/drivers/usb/atm/usbatm.h
index f6f4508a9d42..0863f85fcc26 100644
--- a/drivers/usb/atm/usbatm.h
+++ b/drivers/usb/atm/usbatm.h
@@ -204,4 +204,19 @@ struct usbatm_data {
struct urb *urbs[0];
};
+static inline void *to_usbatm_driver_data(struct usb_interface *intf)
+{
+ struct usbatm_data *usbatm_instance;
+
+ if (intf == NULL)
+ return NULL;
+
+ usbatm_instance = usb_get_intfdata(intf);
+
+ if (usbatm_instance == NULL) /* set NULL before unbind() */
+ return NULL;
+
+ return usbatm_instance->driver_data; /* set NULL after unbind() */
+}
+
#endif /* _USBATM_H_ */