Patch "Input: xpad - prevent spurious input from wired Xbox 360 controllers" has been added to the 4.5-stable tree

Patch "Input: xpad - prevent spurious input from wired Xbox 360 controllers" has been added to the 4.5-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    Input: xpad - prevent spurious input from wired Xbox 360 controllers

to the 4.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     input-xpad-prevent-spurious-input-from-wired-xbox-360-controllers.patch
and it can be found in the queue-4.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 1ff5fa3c6732f08e01ae12f12286d4728c9e4d86 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Fri, 27 May 2016 16:23:50 -0700
Subject: Input: xpad - prevent spurious input from wired Xbox 360 controllers

From: Cameron Gutman <aicommander@gmail.com>

commit 1ff5fa3c6732f08e01ae12f12286d4728c9e4d86 upstream.

After initially connecting a wired Xbox 360 controller or sending it
a command to change LEDs, a status/response packet is interpreted as
controller input. This causes the state of buttons represented in
byte 2 of the controller data packet to be incorrect until the next
valid input packet. Wireless Xbox 360 controllers are not affected.

Writing a new value to the LED device while holding the Start button
and running jstest is sufficient to reproduce this bug. An event will
come through with the Start button released.

Xboxdrv also won't attempt to read controller input from a packet
where byte 0 is non-zero. It also checks that byte 1 is 0x14, but
that value differs between wired and wireless controllers and this
code is shared by both. I think just checking byte 0 is enough to
eliminate unwanted packets.

The following are some examples of 3-byte status packets I saw:
01 03 02
02 03 00
03 03 03
08 03 00

Signed-off-by: Cameron Gutman <aicommander@gmail.com>
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/input/joystick/xpad.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -455,6 +455,10 @@ static void xpad_process_packet(struct u
 static void xpad360_process_packet(struct usb_xpad *xpad, struct input_dev *dev,
 				   u16 cmd, unsigned char *data)
 {
+	/* valid pad data */
+	if (data[0] != 0x00)
+		return;
+
 	/* digital pad */
 	if (xpad->mapping & MAP_DPAD_TO_BUTTONS) {
 		/* dpad as buttons (left, right, up, down) */


Patches currently in stable-queue which might be from aicommander@gmail.com are

queue-4.5/input-xpad-prevent-spurious-input-from-wired-xbox-360-controllers.patch