Re: [PATCH] leds: lm3532: Avoid potentially unpaired regulator calls

From: Pavel Machek
Date: Wed Aug 28 2019 - 04:42:40 EST


Hi!

> We may currently get unpaired regulator calls when configuring the LED
> brightness via sysfs in case of regulator calls producing errors. Let's
> fix this by maintaining local state for enabled.
>
> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>

Acked-by: Pavel Machek <pavel@xxxxxx>

> +++ b/drivers/leds/leds-lm3532.c
> @@ -127,6 +127,7 @@ struct lm3532_als_data {
> * @num_leds - Number of LED strings are supported in this array
> * @full_scale_current - The full-scale current setting for the current sink.
> * @led_strings - The LED strings supported in this array
> + * @enabled - Enabled status
> * @label - LED label
> */
> struct lm3532_led {
> @@ -138,6 +139,7 @@ struct lm3532_led {
> int ctrl_brt_pointer;
> int num_leds;
> int full_scale_current;
> + int enabled:1;
> u32 led_strings[LM3532_MAX_CONTROL_BANKS];
> char label[LED_MAX_NAME_SIZE];
> };

I'd do bool enabled, but this version is good, too.

Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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