From 61dd149b102d00cea3815a161e07cd41fcc0d737 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Mon, 20 May 2013 14:20:02 -0700 Subject: [PATCH] staging: comedi: introduce comedi_to_usb_dev() Introduce a helper function to get a usb_device pointer from a comedi_device pointer. Signed-off-by: H Hartley Sweeten Cc Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/comedi_usb.c | 12 ++++++++++++ drivers/staging/comedi/comedidev.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/staging/comedi/comedi_usb.c b/drivers/staging/comedi/comedi_usb.c index b72da7910808..13f18bef6091 100644 --- a/drivers/staging/comedi/comedi_usb.c +++ b/drivers/staging/comedi/comedi_usb.c @@ -30,6 +30,18 @@ struct usb_interface *comedi_to_usb_interface(struct comedi_device *dev) } EXPORT_SYMBOL_GPL(comedi_to_usb_interface); +/** + * comedi_to_usb_dev() - comedi_device pointer to usb_device pointer. + * @dev: comedi_device struct + */ +struct usb_device *comedi_to_usb_dev(struct comedi_device *dev) +{ + struct usb_interface *intf = comedi_to_usb_interface(dev); + + return intf ? interface_to_usbdev(intf) : NULL; +} +EXPORT_SYMBOL_GPL(comedi_to_usb_dev); + /** * comedi_usb_auto_config() - Configure/probe a comedi USB driver. * @intf: usb_interface struct diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h index a31915f1af65..ab926a6654ef 100644 --- a/drivers/staging/comedi/comedidev.h +++ b/drivers/staging/comedi/comedidev.h @@ -491,6 +491,7 @@ struct usb_driver; struct usb_interface; struct usb_interface *comedi_to_usb_interface(struct comedi_device *); +struct usb_device *comedi_to_usb_dev(struct comedi_device *); int comedi_usb_auto_config(struct usb_interface *, struct comedi_driver *, unsigned long context);