6.18-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Weißschuh linux@weissschuh.net
commit 4dbf066d965cd3299fb396f1375d10423c9c625c upstream.
A user reports that on their Lenovo Corsola Magneton with EC firmware steelix-15194.270.0 the driver probe fails with EINVAL. It turns out that the power LED does not contain any color components as indicated by the following "ectool led power query" output:
Brightness range for LED 1: red : 0x0 green : 0x0 blue : 0x0 yellow : 0x0 white : 0x0 amber : 0x0
The LED also does not react to commands sent manually through ectool and is generally non-functional.
Instead of failing the probe for all LEDs managed by the EC when one without color components is encountered, silently skip those.
Cc: stable@vger.kernel.org Fixes: 8d6ce6f3ec9d ("leds: Add ChromeOS EC driver") Signed-off-by: Thomas Weißschuh linux@weissschuh.net Link: https://patch.msgid.link/20251028-cros_ec-leds-no-colors-v1-1-ebe13a02022a@w... Signed-off-by: Lee Jones lee@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/leds/leds-cros_ec.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/leds/leds-cros_ec.c +++ b/drivers/leds/leds-cros_ec.c @@ -142,9 +142,6 @@ static int cros_ec_led_count_subleds(str } }
- if (!num_subleds) - return -EINVAL; - *max_brightness = common_range; return num_subleds; } @@ -189,6 +186,8 @@ static int cros_ec_led_probe_one(struct &priv->led_mc_cdev.led_cdev.max_brightness); if (num_subleds < 0) return num_subleds; + if (num_subleds == 0) + return 0; /* LED without any colors, skip */
priv->cros_ec = cros_ec; priv->led_id = id;