Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / usb / gadget / u_f.c

diff --git a/kernel/drivers/usb/gadget/u_f.c b/kernel/drivers/usb/gadget/u_f.c
new file mode 100644 (file)
index 0000000..c6276f0
--- /dev/null
+++ b/kernel/drivers/usb/gadget/u_f.c
@@ -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_GPL(alloc_ep_req);