| /* |
| * 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); |
