linux-kernel - Re: [PATCH] mmc: sdhci-s3c: Mark expected switch fall-through

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Date:   Mon, 29 Jul 2019 08:38:29 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Ben Dooks <ben-linux@...ff.org>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] mmc: sdhci-s3c: Mark expected switch fall-through

On 29/07/19 3:02 AM, Gustavo A. R. Silva wrote:
> Mark switch cases where we are expecting to fall through.
> 
> This patch fixes the following warnings:
> 
> drivers/mmc/host/sdhci-s3c.c: In function 'sdhci_s3c_probe':
> drivers/mmc/host/sdhci-s3c.c:613:19: warning: this statement may fall through [-Wimplicit-fallthrough=]
>    host->mmc->caps |= MMC_CAP_8_BIT_DATA;
> drivers/mmc/host/sdhci-s3c.c:614:2: note: here
>   case 4:
>   ^~~~
> 
> Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
>  drivers/mmc/host/sdhci-s3c.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
> index 8e4a8ba33f05..cefa0fb8cfde 100644
> --- a/drivers/mmc/host/sdhci-s3c.c
> +++ b/drivers/mmc/host/sdhci-s3c.c
> @@ -611,6 +611,7 @@ static int sdhci_s3c_probe(struct platform_device *pdev)
>  	switch (pdata->max_width) {
>  	case 8:
>  		host->mmc->caps |= MMC_CAP_8_BIT_DATA;
> +		/* Fall through */
>  	case 4:
>  		host->mmc->caps |= MMC_CAP_4_BIT_DATA;
>  		break;
>