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List:       linux-driver-devel
Subject:    Re: [PATCH 1/2] staging: iio: accel: fix error check
From:       Luis de Bethencourt <luisbg () osg ! samsung ! com>
Date:       2016-05-31 21:10:10
Message-ID: 574DFDB2.4070503 () osg ! samsung ! com
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On 31/05/16 22:08, Luis de Bethencourt wrote:
> sca3000_read_ctrl_reg() returns a negative number on failure, check for
> this instead of zero.
> 
> Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
> Reviewed-by: Andrew F. Davis <afd@ti.com>
> Reviewed-by: Jonathan Cameron <jic23@kernel.org>
> ---
> 
> Patch corrected thanks to comments from Andrew F. Davis and Jonathan Cameron.
> https://lkml.org/lkml/2016/5/31/862
> 
> Thanks,
> Luis
> 
>  drivers/staging/iio/accel/sca3000_core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/iio/accel/sca3000_core.c b/drivers/staging/iio/accel/sca3000_core.c
> index a8f533a..ec12181 100644
> --- a/drivers/staging/iio/accel/sca3000_core.c
> +++ b/drivers/staging/iio/accel/sca3000_core.c
> @@ -594,7 +594,7 @@ static ssize_t sca3000_read_frequency(struct device *dev,
>  		goto error_ret_mut;
>  	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);
>  	mutex_unlock(&st->lock);
> -	if (ret)
> +	if (ret < 0)
>  		goto error_ret;
>  	val = ret;
>  	if (base_freq > 0)
> 

I sent this with git send-email using --subject-prefix="PATCH v2", no idea why the version wasn't
added.

Apologies,
Luis
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