linux-kernel - Re: [PATCH] staging: iio: ad7816: drop unnecessary initialization of variables

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Date:   Sun, 16 Dec 2018 12:38:04 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Hardik Singh Rathore <hardiksingh.k@...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] staging: iio: ad7816: drop unnecessary initialization
 of variables

On Wed, 12 Dec 2018 23:27:07 +0530
Hardik Singh Rathore <hardiksingh.k@...il.com> wrote:

> Initialization is unnecessary when the variable is written before it is
> read. There were some occasions in which the driver would initialize `ret'
> during declaration without need.
> 
> Signed-off-by: Hardik Singh Rathore <hardiksingh.k@...il.com>
Applied.

Thanks,

Jonathan
> ---
>  drivers/staging/iio/adc/ad7816.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/staging/iio/adc/ad7816.c b/drivers/staging/iio/adc/ad7816.c
> index 5209651a1b25..ee50e7296795 100644
> --- a/drivers/staging/iio/adc/ad7816.c
> +++ b/drivers/staging/iio/adc/ad7816.c
> @@ -65,7 +65,7 @@ enum ad7816_type {
>  static int ad7816_spi_read(struct ad7816_chip_info *chip, u16 *data)
>  {
>  	struct spi_device *spi_dev = chip->spi_dev;
> -	int ret = 0;
> +	int ret;
>  	__be16 buf;
>  
>  	gpiod_set_value(chip->rdwr_pin, 1);
> @@ -106,7 +106,7 @@ static int ad7816_spi_read(struct ad7816_chip_info *chip, u16 *data)
>  static int ad7816_spi_write(struct ad7816_chip_info *chip, u8 data)
>  {
>  	struct spi_device *spi_dev = chip->spi_dev;
> -	int ret = 0;
> +	int ret;
>  
>  	gpiod_set_value(chip->rdwr_pin, 1);
>  	gpiod_set_value(chip->rdwr_pin, 0);
> @@ -354,8 +354,7 @@ static int ad7816_probe(struct spi_device *spi_dev)
>  {
>  	struct ad7816_chip_info *chip;
>  	struct iio_dev *indio_dev;
> -	int ret = 0;
> -	int i;
> +	int i, ret;
>  
>  	indio_dev = devm_iio_device_alloc(&spi_dev->dev, sizeof(*chip));
>  	if (!indio_dev)