diff mbox series

[v3,3/3] iio: temperature: mlx90632 Change return value of sensor measurement channel

Message ID 61da82560512fbbda5f4124a1c907375da822b15.1662454215.git.cmo@melexis.com (mailing list archive)
State Changes Requested
Headers show
Series iio: temperature: mlx90632: Add powermanagement | expand

Commit Message

Crt Mori Sept. 6, 2022, 9:04 a.m. UTC
From: Crt Mori <cmo@melexis.com>

The current EINVAL value is more applicable to embedded library, where
user can actually put the fixed value to the sensor. In case of the
driver if the value of the channel is invalid it is better in inform
userspace that Channel was out of range as that implies more to internal
driver error than invalid input. It also makes for easier debugging of
where the error comes from during the development.

Signed-off-by: Crt Mori <cmo@melexis.com>
---
 drivers/iio/temperature/mlx90632.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Andy Shevchenko Sept. 6, 2022, 10:23 a.m. UTC | #1
On Tue, Sep 6, 2022 at 12:05 PM <cmo@melexis.com> wrote:
>
> From: Crt Mori <cmo@melexis.com>
>
> The current EINVAL value is more applicable to embedded library, where

an embedded
  ...or...
libraries

> user can actually put the fixed value to the sensor. In case of the
> driver if the value of the channel is invalid it is better in inform
> userspace that Channel was out of range as that implies more to internal
> driver error than invalid input. It also makes for easier debugging of
> where the error comes from during the development.

As I said earlier I'm in favour of this change to at least make good
use of this error code since it is confirmed to help debugging.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

> Signed-off-by: Crt Mori <cmo@melexis.com>
> ---
>  drivers/iio/temperature/mlx90632.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
> index 6b33284eb0b6..aee065a38772 100644
> --- a/drivers/iio/temperature/mlx90632.c
> +++ b/drivers/iio/temperature/mlx90632.c
> @@ -436,7 +436,7 @@ static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
>                 *channel_old = 1;
>                 break;
>         default:
> -               return -EINVAL;
> +               return -ECHRNG;
>         }
>
>         return 0;
> --
> 2.34.1
>
diff mbox series

Patch

diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
index 6b33284eb0b6..aee065a38772 100644
--- a/drivers/iio/temperature/mlx90632.c
+++ b/drivers/iio/temperature/mlx90632.c
@@ -436,7 +436,7 @@  static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
 		*channel_old = 1;
 		break;
 	default:
-		return -EINVAL;
+		return -ECHRNG;
 	}
 
 	return 0;