linux-kernel - Re: [PATCH v2] iio: mma8452: Add missed iio_device_unregister() call in mma8452

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Date:   Sun, 31 May 2020 12:19:52 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Chuhong Yuan <hslester96@...il.com>
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Bijosh Thykkoottathil <bijosh.t@...mail.com>,
        Martin Kepplinger <martink@...teo.de>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] iio: mma8452: Add missed iio_device_unregister()
 call in mma8452_probe()

On Thu, 28 May 2020 14:41:21 +0800
Chuhong Yuan <hslester96@...il.com> wrote:

> The function iio_device_register() was called in mma8452_probe().
> But the function iio_device_unregister() was not called after
> a call of the function mma8452_set_freefall_mode() failed.
> Thus add the missed function call for one error case.
> 
> Fixes: 1a965d405fc6 ("drivers:iio:accel:mma8452: added cleanup provision in case of failure.")
> Signed-off-by: Chuhong Yuan <hslester96@...il.com>

Applied to the fixes-togreg branch of iio.git 
> ---
> Changes in v2:
>   - Add fixes tag.
>   - Modify description.
> 
>  drivers/iio/accel/mma8452.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
> index 00e100fc845a..813bca7cfc3e 100644
> --- a/drivers/iio/accel/mma8452.c
> +++ b/drivers/iio/accel/mma8452.c
> @@ -1685,10 +1685,13 @@ static int mma8452_probe(struct i2c_client *client,
>  
>  	ret = mma8452_set_freefall_mode(data, false);
>  	if (ret < 0)
> -		goto buffer_cleanup;
> +		goto unregister_device;
>  
>  	return 0;
>  
> +unregister_device:
> +	iio_device_unregister(indio_dev);
> +
>  buffer_cleanup:
>  	iio_triggered_buffer_cleanup(indio_dev);
>