linux-kernel - Re: [PATCH] dmaengine: nbpfaxi: mark expected switch fall-through

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Message-ID: <20171016064818.GM30097@localhost>
Date:   Mon, 16 Oct 2017 12:18:18 +0530
From:   Vinod Koul <vinod.koul@...el.com>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>
Cc:     Dan Williams <dan.j.williams@...el.com>, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dmaengine: nbpfaxi: mark expected switch fall-through

On Fri, Oct 13, 2017 at 03:17:19PM -0500, Gustavo A. R. Silva wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch cases
> where we are expecting to fall through.
> 
> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
> ---
>  drivers/dma/nbpfaxi.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/dma/nbpfaxi.c b/drivers/dma/nbpfaxi.c
> index d3f918a..68a3a83 100644
> --- a/drivers/dma/nbpfaxi.c
> +++ b/drivers/dma/nbpfaxi.c
> @@ -479,6 +479,7 @@ static size_t nbpf_xfer_size(struct nbpf_device *nbpf,
>  
>  	default:
>  		pr_warn("%s(): invalid bus width %u\n", __func__, width);
> +		/* fall through */

can we add more details why we are falling thru and why this value is sane
default..

>  	case DMA_SLAVE_BUSWIDTH_1_BYTE:
>  		size = burst;
>  	}
> -- 
> 2.7.4
> 

-- 
~Vinod