Re: [PATCH] iio: light: ltrf216a: fix runtime PM reference leak in error path

[Andy Shevchenko]

On Mon, Jul 13, 2026 at 07:58:29AM +0530, Vidhu Sarwal wrote:
> ltrf216a_get_lux() acquires a runtime PM reference by calling
> ltrf216a_set_power_state(data, true). However, if
> ltrf216a_read_data() fails, the function returns immediately without
> dropping the reference.
> 
> This leaves the runtime PM usage count unbalanced, preventing the device
> from autosuspending after a failed read.
> 
> Fix this by releasing the runtime PM reference before returning from the
> error path.

...

> static int ltrf216a_get_lux(struct ltrf216a_data *data)

>  	greendata = ltrf216a_read_data(data, LTRF216A_ALS_DATA_0);
> -	if (greendata < 0)
> +	if (greendata < 0) {
> +		ltrf216a_set_power_state(data, false);
>  		return greendata;
> +	}
>  
>  	ltrf216a_set_power_state(data, false);

Wouldn't be simpler to do

	greendata = ltrf216a_read_data(data, LTRF216A_ALS_DATA_0);

	ltrf216a_set_power_state(data, false);

	if (greendata < 0)
		return greendata;

?

Not insisting on this. Up to Jonathan and others to decide.


-- 
With Best Regards,
Andy Shevchenko