Re: [PATCH v3 3/3] leds: add new LED driver for TI LP5812

[Markus Elfring]

…
> +++ b/drivers/leds/leds-lp5812.c
> @@ -0,0 +1,2190 @@
…
> +static ssize_t device_enable_show(struct device *dev,
> +		struct device_attribute *attr,
> +		char *buf)
> +{
…
> +	mutex_lock(&chip->lock);
> +	if (lp5812_read(chip, chip->regs->enable_reg, &enable)) {
> +		mutex_unlock(&chip->lock);
> +		return -EIO;
> +	}
> +	mutex_unlock(&chip->lock);
> +
> +	return sprintf(buf, "%d\n", enable);
> +}
…

Under which circumstances would you become interested to apply a statement
like “guard(mutex)(&chip->lock);”?
https://elixir.bootlin.com/linux/v6.14-rc6/source/include/linux/mutex.h#L201

Regards,
Markus