Patch "Input: synaptics - fix handling of disabling gesture mode" has been added to the 3.10-stable tree

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

Input: synaptics - fix handling of disabling gesture mode

to the 3.10-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-synaptics-fix-handling-of-disabling-gesture-mode.patch
and it can be found in the queue-3.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Dmitry Torokhov <[email protected]>
Date: Thu, 20 Aug 2015 14:28:48 -0700
Subject: Input: synaptics - fix handling of disabling gesture mode

From: Dmitry Torokhov <[email protected]>

commit e51e38494a8ecc18650efb0c840600637891de2c upstream.

Bit 2 of the mode byte has dual meaning: it can disable reporting of gestures when touchpad works in Relative mode or normal Absolute mode, or it can enable so called Extended W-Mode when touchpad uses enhanced Absolute mode (W-mode). The extended W-Mode confuses our driver and causes missing button presses on some Thinkpads (x250, T450s), so let's make sure we do not enable it.

Also, according to the spec W mode "... bit is defined only in Absolute mode on pads whose capExtended capability bit is set. In Relative mode and in TouchPads without this capability, the bit is reserved and should be left at 0.", so let's make sure we respect this requirement as well.

---
 drivers/input/mouse/synaptics.c |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

@@ -360,14 +360,18 @@ static int synaptics_set_mode(struct psm
 	struct synaptics_data *priv = psmouse->private;
 
 	priv->mode = 0;
-	if (priv->absolute_mode)
+
+	if (priv->absolute_mode) {
 		priv->mode |= SYN_BIT_ABSOLUTE_MODE;
-	if (priv->disable_gesture)
+		if (SYN_CAP_EXTENDED(priv->capabilities))
+			priv->mode |= SYN_BIT_W_MODE;
+	}
+
+	if (!SYN_MODE_WMODE(priv->mode) && priv->disable_gesture)
 		priv->mode |= SYN_BIT_DISABLE_GESTURE;
+
 	if (psmouse->rate >= 80)
 		priv->mode |= SYN_BIT_HIGH_RATE;
-	if (SYN_CAP_EXTENDED(priv->capabilities))
-		priv->mode |= SYN_BIT_W_MODE;
 
 	if (synaptics_mode_cmd(psmouse, priv->mode))
 		return -1;

Patches currently in stable-queue which might be from [email protected] are

queue-3.10/input-synaptics-fix-handling-of-disabling-gesture-mode.patch