fbdev: udlfb: Use usb_control_msg_send()

Use the newly introduced usb_control_msg_send() instead of usb_control_msg()
when selecting the channel.

Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Helge Deller <deller@gmx.de>

drivers/video/fbdev/udlfb.c

@@ -1543,24 +1543,16 @@ static const struct device_attribute fb_device_attrs[] = {
 static int dlfb_select_std_channel(struct dlfb_data *dlfb)
 {
 	int ret;
-	void *buf;
 	static const u8 set_def_chn[] = {
 				0x57, 0xCD, 0xDC, 0xA7,
 				0x1C, 0x88, 0x5E, 0x15,
 				0x60, 0xFE, 0xC6, 0x97,
 				0x16, 0x3D, 0x47, 0xF2  };
 
-	buf = kmemdup(set_def_chn, sizeof(set_def_chn), GFP_KERNEL);
-
-	if (!buf)
-		return -ENOMEM;
-
-	ret = usb_control_msg(dlfb->udev, usb_sndctrlpipe(dlfb->udev, 0),
-			NR_USB_REQUEST_CHANNEL,
+	ret = usb_control_msg_send(dlfb->udev, 0, NR_USB_REQUEST_CHANNEL,
 			(USB_DIR_OUT | USB_TYPE_VENDOR), 0, 0,
-			buf, sizeof(set_def_chn), USB_CTRL_SET_TIMEOUT);
-
-	kfree(buf);
+			&set_def_chn, sizeof(set_def_chn), USB_CTRL_SET_TIMEOUT,
+			GFP_KERNEL);
 
 	return ret;
 }