Patch "HID: wacom: leds: Don't try to control the EKR's read-only LEDs" has been added to the 4.9-stable tree

[<gregkh@linuxfoundation.org>]

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

    HID: wacom: leds: Don't try to control the EKR's read-only LEDs

to the 4.9-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-leds-don-t-try-to-control-the-ekr-s-read-only-leds.patch
and it can be found in the queue-4.9 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 74aebed6dc13425233f2224668353cff7a112776 Mon Sep 17 00:00:00 2001
From: Aaron Armstrong Skomra <skomra@gmail.com>
Date: Mon, 28 Aug 2017 14:15:39 -0700
Subject: HID: wacom: leds: Don't try to control the EKR's read-only LEDs

From: Aaron Armstrong Skomra <skomra@gmail.com>

commit 74aebed6dc13425233f2224668353cff7a112776 upstream.

Commit a50aac7193f1 introduces 'led.groups' and adds EKR support
for these groups. However, unlike the other devices with LEDs,
the EKR's LEDs are read-only and we shouldn't attempt to control
them in wacom_led_control().

See bug: https://sourceforge.net/p/linuxwacom/bugs/342/

Fixes: a50aac7193f1 ("HID: wacom: leds: dynamically allocate LED groups")
Signed-off-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/hid/wacom_sys.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -712,6 +712,9 @@ static int wacom_led_control(struct waco
 	if (!wacom->led.groups)
 		return -ENOTSUPP;
 
+	if (wacom->wacom_wac.features.type == REMOTE)
+		return -ENOTSUPP;
+
 	if (wacom->wacom_wac.pid) { /* wireless connected */
 		report_id = WAC_CMD_WL_LED_CONTROL;
 		buf_size = 13;


Patches currently in stable-queue which might be from skomra@gmail.com are

queue-4.9/hid-wacom-leds-don-t-try-to-control-the-ekr-s-read-only-leds.patch