linux-kernel - Re: [PATCH 1/2] i2c: exynos5: remove some dead code

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Date:   Thu, 10 May 2018 10:36:57 +0200
From:   Andrzej Hajda <a.hajda@...sung.com>
To:     Peter Rosin <peda@...ntia.se>, linux-kernel@...r.kernel.org
Cc:     Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-i2c@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH 1/2] i2c: exynos5: remove some dead code

On 09.05.2018 21:45, Peter Rosin wrote:
> The else branch cannot be taken as i will always equal num.
> Get rid of the whole construct.
>
> Signed-off-by: Peter Rosin <peda@...ntia.se>
> ---
>  drivers/i2c/busses/i2c-exynos5.c | 12 +-----------
>  1 file changed, 1 insertion(+), 11 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-exynos5.c b/drivers/i2c/busses/i2c-exynos5.c
> index 12ec8484e653..a2cbc779c33a 100644
> --- a/drivers/i2c/busses/i2c-exynos5.c
> +++ b/drivers/i2c/busses/i2c-exynos5.c
> @@ -727,17 +727,7 @@ static int exynos5_i2c_xfer(struct i2c_adapter *adap,
>  			goto out;
>  	}
>  
> -	if (i == num) {
> -		ret = num;
> -	} else {
> -		/* Only one message, cannot access the device */
> -		if (i == 1)
> -			ret = -EREMOTEIO;
> -		else
> -			ret = i;
> -
> -		dev_warn(i2c->dev, "xfer message failed\n");
> -	}
> +	ret = num;
>  
>   out:
>  	clk_disable(i2c->clk);

You can go further and remove "out:" label, use break instead, and at
the end use "return (i == num) ? num : ret;" or sth similar.

With this change you can add:

Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>

 --
Regards
Andrzej