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usb: gadget: factor out alloc_ep_req

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alloc_ep_req() is a function repeated in several modules.
Make a common implementation and use it.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Andrzej Pietrasiewicz
2013-11-07 08:41:26 +01:00
committed by Felipe Balbi
parent a01091e5ce
commit 1efd54eab2
8 changed files with 83 additions and 49 deletions
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32
drivers/usb/gadget/u_f.c Normal file
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@@ -0,0 +1,32 @@
/*
* u_f.c -- USB function utilities for Gadget stack
*
* 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.
*/
#include <linux/usb/gadget.h>
#include "u_f.h"
struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len)
{
struct usb_request *req;
req = usb_ep_alloc_request(ep, GFP_ATOMIC);
if (req) {
req->length = len ?: default_len;
req->buf = kmalloc(req->length, GFP_ATOMIC);
if (!req->buf) {
usb_ep_free_request(ep, req);
req = NULL;
}
}
return req;
}
EXPORT_SYMBOL(alloc_ep_req);