Being integrated into an USB keyboard-dock the mute LED can go away
at any time, leading to the following errors:
[ 918.667671] elan 0003:04F3:0755.0002: Failed to set mute led brightness: -19
[ 918.667737] leds elan:red:mute: Setting an LED's brightness failed (-19)
Fix this by making the following changes:
1. Don't log an error from elan_mute_led_set_brigtness() when
ret == -ENODEV
2. Set the LED_HW_PLUGGABLE flag on the mute LED led_classdev
While at it also make sure that elan_mute_led_set_brigtness() returns
an error (-EIO) when ret != 3 but it is not an error (>= 0).
Reviewed-by: Marek Behún <kabel@xxxxxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
Changes in v2:
- Return -EIO when ret != 3 and >= 0
---
drivers/hid/hid-elan.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/hid/hid-elan.c b/drivers/hid/hid-elan.c
index dae193749d44..473d8528319d 100644
--- a/drivers/hid/hid-elan.c
+++ b/drivers/hid/hid-elan.c
@@ -445,8 +445,9 @@ static int elan_mute_led_set_brigtness(struct led_classdev *led_cdev,
kfree(dmabuf);
if (ret != ELAN_LED_REPORT_SIZE) {
- hid_err(hdev, "Failed to set mute led brightness: %d\n", ret);
- return ret;
+ if (ret != -ENODEV)
+ hid_err(hdev, "Failed to set mute led brightness: %d\n", ret);
+ return ret < 0 ? ret : -EIO;
}
drvdata->mute_led_state = led_state;
@@ -462,6 +463,7 @@ static int elan_init_mute_led(struct hid_device *hdev)
mute_led->brightness_get = elan_mute_led_get_brigtness;
mute_led->brightness_set_blocking = elan_mute_led_set_brigtness;
mute_led->max_brightness = LED_ON;
+ mute_led->flags = LED_HW_PLUGGABLE;
mute_led->dev = &hdev->dev;
return devm_led_classdev_register(&hdev->dev, mute_led);
--
2.30.2
