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path: root/drivers/usb/gadget/u_f.c
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Diffstat (limited to 'drivers/usb/gadget/u_f.c')
-rw-r--r--drivers/usb/gadget/u_f.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/usb/gadget/u_f.c b/drivers/usb/gadget/u_f.c
new file mode 100644
index 000000000000..63b6642c162b
--- /dev/null
+++ b/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(alloc_ep_req);