This is a note to let you know that I've just added the patch titled
Input: wacom_w8001 - ignore invalid pen data packets
to the 4.4-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-wacom_w8001-ignore-invalid-pen-data-packets.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9e72ac7492149a229ce9039c680849cb682d7092 Mon Sep 17 00:00:00 2001
From: Ping Cheng <pinglinux@xxxxxxxxx>
Date: Thu, 23 Jun 2016 10:55:11 -0700
Subject: Input: wacom_w8001 - ignore invalid pen data packets
From: Ping Cheng <pinglinux@xxxxxxxxx>
commit 9e72ac7492149a229ce9039c680849cb682d7092 upstream.
ThinkPad X60 Tablet PC (pen only device) sometime posts
packets that are larger than W8001_PKTLEN_TPCPEN.
Reported-by: Chris J Arges <christopherarges@xxxxxxxxx>
Tested-by: Chris J Arges <christopherarges@xxxxxxxxx>
Signed-off-by: Ping Cheng <pingc@xxxxxxxxx>
Reviewed-by: Peter Hutterer <peter.hutterer@xxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/input/touchscreen/wacom_w8001.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/drivers/input/touchscreen/wacom_w8001.c
+++ b/drivers/input/touchscreen/wacom_w8001.c
@@ -342,6 +342,15 @@ static irqreturn_t w8001_interrupt(struc
w8001->idx = 0;
parse_multi_touch(w8001);
break;
+
+ default:
+ /*
+ * ThinkPad X60 Tablet PC (pen only device) sometimes
+ * sends invalid data packets that are larger than
+ * W8001_PKTLEN_TPCPEN. Let's start over again.
+ */
+ if (!w8001->touch_dev && w8001->idx > W8001_PKTLEN_TPCPEN - 1)
+ w8001->idx = 0;
}
return IRQ_HANDLED;
Patches currently in stable-queue which might be from pinglinux@xxxxxxxxx are
queue-4.4/input-wacom_w8001-w8001_max_length-should-be-13.patch
queue-4.4/input-wacom_w8001-ignore-invalid-pen-data-packets.patch
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