Patch "HID: wacom: fix Bamboo ONE oops" has been added to the 4.4-stable tree

Patch "HID: wacom: fix Bamboo ONE oops" has been added to the 4.4-stable tree

[gregkh]

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

    HID: wacom: fix Bamboo ONE oops

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:
     hid-wacom-fix-bamboo-one-oops.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@vger.kernel.org> know about it.


>From 580549ef6b3e3fb3b958de490ca99f43a089a2cf Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Fri, 25 Mar 2016 15:26:55 +0100
Subject: HID: wacom: fix Bamboo ONE oops

From: Benjamin Tissoires <benjamin.tissoires@redhat.com>

commit 580549ef6b3e3fb3b958de490ca99f43a089a2cf upstream.

Looks like recent changes in the Wacom driver made the Bamboo ONE crashes.
The tablet behaves as if it was a regular Bamboo device with pen, touch
and pad, but there is no physical pad connected to it.
The weird part is that the pad is still sending events and given that
there is no input node connected to it, we get  anull pointer exception.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=1317116

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/hid/wacom_wac.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -2493,6 +2493,17 @@ void wacom_setup_device_quirks(struct wa
 	}
 
 	/*
+	 * Hack for the Bamboo One:
+	 * the device presents a PAD/Touch interface as most Bamboos and even
+	 * sends ghosts PAD data on it. However, later, we must disable this
+	 * ghost interface, and we can not detect it unless we set it here
+	 * to WACOM_DEVICETYPE_PAD or WACOM_DEVICETYPE_TOUCH.
+	 */
+	if (features->type == BAMBOO_PEN &&
+	    features->pktlen == WACOM_PKGLEN_BBTOUCH3)
+		features->device_type |= WACOM_DEVICETYPE_PAD;
+
+	/*
 	 * Raw Wacom-mode pen and touch events both come from interface
 	 * 0, whose HID descriptor has an application usage of 0xFF0D
 	 * (i.e., WACOM_VENDORDEFINED_PEN). We route pen packets back


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

queue-4.4/hid-wacom-fix-bamboo-one-oops.patch