linux-kernel - Re: [PATCH] i2c: s3c2410: change return type of 'i2c_s3c_irq

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Message-ID: <5f862222-b3ea-ac7d-2c82-92aaad56ad3e@linaro.org>
Date:   Fri, 6 May 2022 14:06:18 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Yihao Han <hanyihao@...o.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        linux-i2c@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     kernel@...o.com
Subject: Re: [PATCH] i2c: s3c2410: change return type of
 'i2c_s3c_irq_nextbyte' from 'int' to 'void'

On 06/05/2022 13:34, Yihao Han wrote:
> Since ret is a redundant variable, and none of the callers check
> for return, so remove ret variable and change return type of 
> 'i2c_s3c_irq_nextbyte' from 'int' to 'void'
> 
> Suggested-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Signed-off-by: Yihao Han <hanyihao@...o.com>
> ---
>  drivers/i2c/busses/i2c-s3c2410.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
> index b49a1b170bb2..75ddf7ffb028 100644
> --- a/drivers/i2c/busses/i2c-s3c2410.c
> +++ b/drivers/i2c/busses/i2c-s3c2410.c
> @@ -381,17 +381,15 @@ static inline int is_msgend(struct s3c24xx_i2c *i2c)
>  /*
>   * process an interrupt and work out what to do
>   */
> -static int i2c_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
> +static void i2c_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
>  {
>  	unsigned long tmp;
>  	unsigned char byte;
> -	int ret = 0;
>  
>  	switch (i2c->state) {
>  
>  	case STATE_IDLE:
>  		dev_err(i2c->dev, "%s: called in STATE_IDLE\n", __func__);
> -		goto out;

This does not look equivalent. Should be a return here.


Best regards,
Krzysztof