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 4.6-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-4.6 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 @@ -339,6 +339,15 @@ 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-4.6/revert-input-wacom_w8001-drop-use-of-abs_mt_tool_type.patch queue-4.6/input-wacom_w8001-w8001_max_length-should-be-13.patch queue-4.6/input-wacom_w8001-ignore-invalid-pen-data-packets.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html