Re: [PATCH v4 8/8] iio: accel: sca3000: convert to guard(mutex)

[David Lechner <dlechner@baylibre.com>]

On 3/14/26 12:06 PM, Rajveer Chaudhari wrote:
> Replace manual mutex_lock/mutex_unlock pair with guard(mutex) in
> sca3000_print_rev(), sca3000_ring_int_process(),
> sca3000_read_event_config(), __sca3000_hw_ring_state_set(),
> sca3000_hw_ring_preenable(), sca3000_hw_ring_postdisable(),
> sca3000_clean_setup(), sca3000_stop_all_interrupts().
> This ensures the mutex is released on all return paths and
> allows returning directly without a goto label.
> 
> Signed-off-by: Rajveer Chaudhari <rajveer.chaudhari.linux@gmail.com>
> ---

...

> @@ -1132,24 +1131,18 @@ static int sca3000_read_event_config(struct iio_dev *indio_dev,
>  		 */
>  		if ((st->rx[0] & SCA3000_REG_MODE_MODE_MASK)
>  		    != SCA3000_REG_MODE_MEAS_MODE_MOT_DET) {

can drop this { now.

> -			ret = 0;
> -		} else {
> -			ret = sca3000_read_ctrl_reg(st,
> -						SCA3000_REG_CTRL_SEL_MD_CTRL);
> -			if (ret < 0)
> -				goto error_ret;
> -			/* only supporting logical or's for now */
> -			ret = !!(ret & sca3000_addresses[chan->address][2]);
> +			return 0;
>  		}
> -		break;
> +
> +		ret = sca3000_read_ctrl_reg(st,
> +					SCA3000_REG_CTRL_SEL_MD_CTRL);
> +		if (ret < 0)
> +			return ret;
> +		/* only supporting logical or's for now */
> +		return !!(ret & sca3000_addresses[chan->address][2]);
>  	default:
> -		ret = -EINVAL;
> +		return -EINVAL;
>  	}
> -
> -error_ret:
> -	mutex_unlock(&st->lock);
> -
> -	return ret;
>  }
>