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Date: Tue, 10 Oct 2017 21:50:58 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Aaron Armstrong Skomra <aaron.skomra@...om.com>,
Jason Gerecke <jason.gerecke@...om.com>,
Jiri Kosina <jkosina@...e.cz>
Subject: [PATCH 4.13 130/160] HID: wacom: leds: Dont try to control the EKRs read-only LEDs
4.13-stable review patch. If anyone has any objections, please let me know.
------------------
From: Aaron Armstrong Skomra <skomra@...il.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@...om.com>
Reviewed-by: Jason Gerecke <jason.gerecke@...om.com>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/hid/wacom_sys.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -766,6 +766,9 @@ 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;
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