diff mbox series

[v3,05/12] iio: inkern: Remove the 'unused' variable usage in iio_channel_read_max()

Message ID 20230612122926.107333-6-herve.codina@bootlin.com
State New
Headers
Series Add support for IIO devices in ASoC |

Commit Message

Herve Codina June 12, 2023, 12:29 p.m. UTC 
  The code uses a local variable to initialize a null pointer in order to
avoid accessing this null pointer later on.

Simply removed the 'unused' variable and check for the null pointer just
before accessing it.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
 drivers/iio/inkern.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

Comments

Andy Shevchenko June 12, 2023, 2:05 p.m. UTC | #1 
On Mon, Jun 12, 2023 at 3:30 PM Herve Codina <herve.codina@bootlin.com> wrote:
>
> The code uses a local variable to initialize a null pointer in order to
> avoid accessing this null pointer later on.
>
> Simply removed the 'unused' variable and check for the null pointer just
> before accessing it.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

> Signed-off-by: Herve Codina <herve.codina@bootlin.com>
> ---
>  drivers/iio/inkern.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
> index f738db9a0c04..ce537b4ca6ca 100644
> --- a/drivers/iio/inkern.c
> +++ b/drivers/iio/inkern.c
> @@ -849,14 +849,10 @@ static int iio_channel_read_max(struct iio_channel *chan,
>                                 int *val, int *val2, int *type,
>                                 enum iio_chan_info_enum info)
>  {
> -       int unused;
>         const int *vals;
>         int length;
>         int ret;
>
> -       if (!val2)
> -               val2 = &unused;
> -
>         ret = iio_channel_read_avail(chan, &vals, type, &length, info);
>         if (ret < 0)
>                 return ret;
> @@ -869,7 +865,8 @@ static int iio_channel_read_max(struct iio_channel *chan,
>                         break;
>                 default:
>                         *val = vals[4];
> -                       *val2 = vals[5];
> +                       if (val2)
> +                               *val2 = vals[5];
>                 }
>                 return 0;
>
> --
> 2.40.1
>
diff mbox series

Patch

diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index f738db9a0c04..ce537b4ca6ca 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -849,14 +849,10 @@  static int iio_channel_read_max(struct iio_channel *chan,
 				int *val, int *val2, int *type,
 				enum iio_chan_info_enum info)
 {
-	int unused;
 	const int *vals;
 	int length;
 	int ret;
 
-	if (!val2)
-		val2 = &unused;
-
 	ret = iio_channel_read_avail(chan, &vals, type, &length, info);
 	if (ret < 0)
 		return ret;
@@ -869,7 +865,8 @@  static int iio_channel_read_max(struct iio_channel *chan,
 			break;
 		default:
 			*val = vals[4];
-			*val2 = vals[5];
+			if (val2)
+				*val2 = vals[5];
 		}
 		return 0;