linux-kernel - Re: [PATCH v3 3/5] staging: iio: adc: ad7280a: Avoid precedence issues in macro

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Message-ID: <20190331103421.7e453618@archlinux>
Date:   Sun, 31 Mar 2019 10:34:21 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Cristian Sicilia <sicilia.cristian@...il.com>
Cc:     Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Hartmut Knaack <knaack.h@....de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-iio@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/5] staging: iio: adc: ad7280a: Avoid precedence
 issues in macro

On Sun, 24 Mar 2019 18:23:12 +0100
Cristian Sicilia <sicilia.cristian@...il.com> wrote:

> Enclosing parameter with parenthesis due to avoid
> possible precedence issue.
> 
> Signed-off-by: Cristian Sicilia <sicilia.cristian@...il.com>
I've already applied this one.

Thanks,

Jonathan

> ---
>  drivers/staging/iio/adc/ad7280a.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
> index 571535d..c2391f6 100644
> --- a/drivers/staging/iio/adc/ad7280a.c
> +++ b/drivers/staging/iio/adc/ad7280a.c
> @@ -97,9 +97,10 @@
>  #define AD7280A_NUM_CH			(AD7280A_AUX_ADC_6 - \
>  					AD7280A_CELL_VOLTAGE_1 + 1)
>  
> -#define AD7280A_CALC_VOLTAGE_CHAN_NUM(d, c) ((d * AD7280A_CELLS_PER_DEV) + c)
> -#define AD7280A_CALC_TEMP_CHAN_NUM(d, c)    ((d * AD7280A_CELLS_PER_DEV) + \
> -					     c - AD7280A_CELLS_PER_DEV)
> +#define AD7280A_CALC_VOLTAGE_CHAN_NUM(d, c) (((d) * AD7280A_CELLS_PER_DEV) + \
> +					     (c))
> +#define AD7280A_CALC_TEMP_CHAN_NUM(d, c)    (((d) * AD7280A_CELLS_PER_DEV) + \
> +					     (c) - AD7280A_CELLS_PER_DEV)
>  
>  #define AD7280A_DEVADDR_MASTER		0
>  #define AD7280A_DEVADDR_ALL		0x1F