[PATCH 2/4] xpad.c Check for data length and ignore packet if it is smaller

[Jan Kratochvil]

xpad360_process_packet will ignore packets smaller then 20 bytes. For example 
notification about headset connection is only 3 bytes long.

Signed-off-by: Jan Kratochvil <[EMAIL PROTECTED]>
---
 drivers/input/joystick/xpad.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index 56d5e3e..15f9877 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -268,12 +268,17 @@ static void xpad_process_packet(struct u
  *
  *     The used report descriptor was taken from:
  *             http://www.free60.org/wiki/Gamepad
+ *     Packet length for valid data is 20 bytes.
  */

 static void xpad360_process_packet(struct usb_xpad *xpad, u16 cmd, unsigned 
char *data)
 {
        struct input_dev *dev = xpad->dev;

+       /* valid data */
+       if (data[1] < 20)
+               return;
+
        /* digital pad */
        if (xpad->dpad_mapping == MAP_DPAD_TO_AXES) {
                input_report_abs(dev, ABS_HAT0X, !!(data[2] & 0x01) - !!((data[2] & 
0x08) >> 3));
--
1.4.3.4