![Felipe F. Tonello](/assets/img/avatar_default.png)
This function is shared between gadget functions, so this avoid unnecessary duplicated code and potentially avoid memory leaks. Reviewed-by: Robert Baldyga <r.baldyga@samsung.com> Signed-off-by: Felipe F. Tonello <eu@felipetonello.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/*
|
|
* u_f.h
|
|
*
|
|
* Utility definitions for USB functions
|
|
*
|
|
* Copyright (c) 2013 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com
|
|
*
|
|
* Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef __U_F_H__
|
|
#define __U_F_H__
|
|
|
|
#include <linux/usb/gadget.h>
|
|
|
|
/* Variable Length Array Macros **********************************************/
|
|
#define vla_group(groupname) size_t groupname##__next = 0
|
|
#define vla_group_size(groupname) groupname##__next
|
|
|
|
#define vla_item(groupname, type, name, n) \
|
|
size_t groupname##_##name##__offset = ({ \
|
|
size_t align_mask = __alignof__(type) - 1; \
|
|
size_t offset = (groupname##__next + align_mask) & ~align_mask;\
|
|
size_t size = (n) * sizeof(type); \
|
|
groupname##__next = offset + size; \
|
|
offset; \
|
|
})
|
|
|
|
#define vla_item_with_sz(groupname, type, name, n) \
|
|
size_t groupname##_##name##__sz = (n) * sizeof(type); \
|
|
size_t groupname##_##name##__offset = ({ \
|
|
size_t align_mask = __alignof__(type) - 1; \
|
|
size_t offset = (groupname##__next + align_mask) & ~align_mask;\
|
|
size_t size = groupname##_##name##__sz; \
|
|
groupname##__next = offset + size; \
|
|
offset; \
|
|
})
|
|
|
|
#define vla_ptr(ptr, groupname, name) \
|
|
((void *) ((char *)ptr + groupname##_##name##__offset))
|
|
|
|
struct usb_ep;
|
|
struct usb_request;
|
|
|
|
/* Requests allocated via alloc_ep_req() must be freed by free_ep_req(). */
|
|
struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len);
|
|
static inline void free_ep_req(struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
kfree(req->buf);
|
|
usb_ep_free_request(ep, req);
|
|
}
|
|
|
|
#endif /* __U_F_H__ */
|