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Commit a5e54b0d authored by David Lopo's avatar David Lopo Committed by Greg Kroah-Hartman
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USB GADGET/PERIPHERAL: g_file_storage Bulk-Only Transport compliance 



Gadget can tell controller driver to ignore Clear-Feature(HALT_ENDPOINT)
This API change enables future support for Bulk-Only Transport compliance

Signed-off-by: default avatarDavid Lopo <lopo.david@gmail.com>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent c4d0f8cb

include/linux/usb/gadget.h

+21 −0
Original line number Diff line number Diff line
@@ -114,6 +114,8 @@ struct usb_ep_ops { 
	int (*dequeue) (struct usb_ep *ep, struct usb_request *req);



	int (*set_halt) (struct usb_ep *ep, int value);

	int (*set_wedge) (struct usb_ep *ep);



	int (*fifo_status) (struct usb_ep *ep);

	void (*fifo_flush) (struct usb_ep *ep);

};
@@ -348,6 +350,25 @@ static inline int usb_ep_clear_halt(struct usb_ep *ep) 
	return ep->ops->set_halt(ep, 0);

}



/**

 * usb_ep_set_wedge - sets the halt feature and ignores clear requests

 * @ep: the endpoint being wedged

 *

 * Use this to stall an endpoint and ignore CLEAR_FEATURE(HALT_ENDPOINT)

 * requests. If the gadget driver clears the halt status, it will

 * automatically unwedge the endpoint.

 *

 * Returns zero on success, else negative errno.

 */

static inline int

usb_ep_set_wedge(struct usb_ep *ep)

{

	if (ep->ops->set_wedge)

		return ep->ops->set_wedge(ep);

	else

		return ep->ops->set_halt(ep, 1);

}



/**

 * usb_ep_fifo_status - returns number of bytes in fifo, or error

 * @ep: the endpoint whose fifo status is being checked.