Commit 201c53c6 authored by Kuen-Han Tsai's avatar Kuen-Han Tsai Committed by Greg Kroah-Hartman
Browse files

usb: gadget: Introduce free_usb_request helper 



Introduce the free_usb_request() function that frees both the request's
buffer and the request itself.

This function serves as the cleanup callback for DEFINE_FREE() to enable
automatic, scope-based cleanup for usb_request pointers.

Signed-off-by: default avatarKuen-Han Tsai <khtsai@google.com>
Link: https://lore.kernel.org/r/20250916-ready-v1-2-4997bf277548@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250916-ready-v1-2-4997bf277548@google.com
parent bfb1d99d

include/linux/usb/gadget.h

+23 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#ifndef __LINUX_USB_GADGET_H

#define __LINUX_USB_GADGET_H



#include <linux/cleanup.h>

#include <linux/configfs.h>

#include <linux/device.h>

#include <linux/errno.h>
@@ -293,6 +294,28 @@ static inline void usb_ep_fifo_flush(struct usb_ep *ep) 


/*-------------------------------------------------------------------------*/



/**

 * free_usb_request - frees a usb_request object and its buffer

 * @req: the request being freed

 *

 * This helper function frees both the request's buffer and the request object

 * itself by calling usb_ep_free_request(). Its signature is designed to be used

 * with DEFINE_FREE() to enable automatic, scope-based cleanup for usb_request

 * pointers.

 */

static inline void free_usb_request(struct usb_request *req)

{

	if (!req)

		return;



	kfree(req->buf);

	usb_ep_free_request(req->ep, req);

}



DEFINE_FREE(free_usb_request, struct usb_request *, free_usb_request(_T))



/*-------------------------------------------------------------------------*/



struct usb_dcd_config_params {

	__u8  bU1devExitLat;	/* U1 Device exit Latency */

#define USB_DEFAULT_U1_DEV_EXIT_LAT	0x01	/* Less then 1 microsec */