Patch "Input: elantech - fix detection of touchpads where the revision matches a known rate" has been added to the 4.0-stable tree

Patch "Input: elantech - fix detection of touchpads where the revision matches a known rate" has been added to the 4.0-stable tree

[gregkh]

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

    Input: elantech - fix detection of touchpads where the revision matches a known rate

to the 4.0-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-elantech-fix-detection-of-touchpads-where-the-revision-matches-a-known-rate.patch
and it can be found in the queue-4.0 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 5f0ee9d17aae628b22be86966471db65be21f262 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 2 Jun 2015 10:40:50 -0700
Subject: Input: elantech - fix detection of touchpads where the revision matches a known rate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Hans de Goede <hdegoede@redhat.com>

commit 5f0ee9d17aae628b22be86966471db65be21f262 upstream.

Make the check to skip the rate check more lax, so that it applies
to all hw_version 4 models.

This fixes the touchpad not being detected properly on Asus PU551LA
laptops.

Reported-and-tested-by: David Zafra Gómez <dezeta@klo.es>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/input/mouse/elantech.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1376,10 +1376,11 @@ static bool elantech_is_signature_valid(
 		return true;
 
 	/*
-	 * Some models have a revision higher then 20. Meaning param[2] may
-	 * be 10 or 20, skip the rates check for these.
+	 * Some hw_version >= 4 models have a revision higher then 20. Meaning
+	 * that param[2] may be 10 or 20, skip the rates check for these.
 	 */
-	if (param[0] == 0x46 && (param[1] & 0xef) == 0x0f && param[2] < 40)
+	if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f &&
+	    param[2] < 40)
 		return true;
 
 	for (i = 0; i < ARRAY_SIZE(rates); i++)


Patches currently in stable-queue which might be from hdegoede@redhat.com are

queue-4.0/input-elantech-fix-detection-of-touchpads-where-the-revision-matches-a-known-rate.patch
queue-4.0/input-alps-do-not-reduce-trackpoint-speed-by-half.patch
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