Re: [PATCH] hid-core: Configurable USB HID Mouse Interrupt Polling Interval

[Mikkel Krautz <krautz@gmail.com>]

On Fri, 17 Dec 2004 18:59:48 -0800, Greg KH <greg@kroah.com> wrote:
 > What about makeing it a module paramater then, that is exported to
 > sysfs?  That makes it easier to adjust on the fly (before the mouse is
 > inserted), and doesn't require the kernel to be rebuilt.

I really like the idea. I'm start to think that this is the ideal way to 
accomplish this.

Here's a new patch. Let's hope it doesn't wrap!




Signed-off-by: Mikkel Krautz <krautz@gmail.com>
---


 hid-core.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletion(-)



--- dirty/drivers/usb/input/hid-core.c
+++ clean/drivers/usb/input/hid-core.c
@@ -37,11 +37,12 @@
  * Version Information
  */
 
-#define DRIVER_VERSION "v2.0"
+#define DRIVER_VERSION "v2.01"
 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik"
 #define DRIVER_DESC "USB HID core driver"
 #define DRIVER_LICENSE "GPL"
 
+static unsigned int hid_mouse_polling_interval;
 static char *hid_types[] = {"Device", "Pointer", "Mouse", "Device", 
"Joystick",
                 "Gamepad", "Keyboard", "Keypad", "Multi-Axis Controller"};
 
@@ -1663,6 +1664,11 @@
         if ((endpoint->bmAttributes & 3) != 3)        /* Not an 
interrupt endpoint */
             continue;
 
+        /* Change the polling interval of mice. */
+        if (hid->collection->usage == HID_GD_MOUSE
+                && hid_mouse_polling_interval > 0)
+            endpoint->bInterval = hid_mouse_polling_interval;
+       
         /* handle potential highspeed HID correctly */
         interval = endpoint->bInterval;
         if (dev->speed == USB_SPEED_HIGH)
@@ -1910,6 +1916,7 @@
 
 module_init(hid_init);
 module_exit(hid_exit);
+module_param(hid_mouse_polling_interval, int, 644);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);