/*
 * Copyright (c) 2013  Hauke Mehrtens <hauke@hauke-m.de>
 *
 * Backport functionality introduced in Linux 3.12.
 *
 * 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.
 */

#include <linux/export.h>
#include <linux/hid.h>
#include <linux/bug.h>

/*
 * Allocator for buffer that is going to be passed to hid_output_report()
 */
u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags)
{
	/*
	 * 7 extra bytes are necessary to achieve proper functionality
	 * of implement() working on 8 byte chunks
	 */

	int len = ((report->size - 1) >> 3) + 1 + (report->id > 0) + 7;

	return kmalloc(len, flags);
}
EXPORT_SYMBOL_GPL(hid_alloc_report_buf);