openwrtv4/target/linux/brcm2708/patches-4.4/0069-hid-Reduce-default-mouse-polling-interval-to-60Hz.patch

From 8529e2130a7d67c7595746e5cf618e6058c3315c Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Mon, 14 Jul 2014 22:02:09 +0100
Subject: [PATCH] hid: Reduce default mouse polling interval to 60Hz

Reduces overhead when using X
---
 drivers/hid/usbhid/hid-core.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -49,7 +49,7 @@
  * Module parameters.
  */
 
-static unsigned int hid_mousepoll_interval;
+static unsigned int hid_mousepoll_interval = ~0;
 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
 
@@ -1083,8 +1083,12 @@ static int usbhid_start(struct hid_devic
 		}
 
 		/* Change the polling interval of mice. */
-		if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
-			interval = hid_mousepoll_interval;
+		if (hid->collection->usage == HID_GD_MOUSE) {
+				if (hid_mousepoll_interval == ~0 && interval < 16)
+						interval = 16;
+				else if (hid_mousepoll_interval != ~0 && hid_mousepoll_interval != 0)
+						interval = hid_mousepoll_interval;
+		}
 
 		ret = -ENOMEM;
 		if (usb_endpoint_dir_in(endpoint)) {