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

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Commit a50aac7193 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: a50aac7193 ("HID: wacom: leds: dynamically allocate LED groups")
Cc: stable <stable@vger.kernel.org>     # 4.9
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>
This commit is contained in:
Aaron Armstrong Skomra 2017-08-28 14:15:39 -07:00 committed by Jiri Kosina
parent ce06760ba4
commit 74aebed6dc
1 changed files with 3 additions and 0 deletions
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3
drivers/hid/wacom_sys.c
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@ -766,6 +766,9 @@ static int wacom_led_control(struct wacom *wacom)
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;