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Commit 61dd149b authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
Browse files

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: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Cc Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4422a6c1

drivers/staging/comedi/comedi_usb.c

+12 −0
Original line number Diff line number Diff line
@@ -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

drivers/staging/comedi/comedidev.h

+1 −0
Original line number Diff line number Diff line
@@ -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);