linux-kernel - Re: [PATCH v2] staging: comedi: ni_660x: fix missing break in switch statement

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Date:   Wed, 13 Feb 2019 10:41:33 +0000
From:   Ian Abbott <abbotti@....co.uk>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        H Hartley Sweeten <hsweeten@...ionengravers.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH v2] staging: comedi: ni_660x: fix missing break in switch
 statement

On 12/02/2019 18:44, Gustavo A. R. Silva wrote:
> Add missing break statement in order to prevent the code from falling
> through to the default case and return -EINVAL every time.
> 
> This bug was found thanks to the ongoing efforts to enable
> -Wimplicit-fallthrough.
> 
> Fixes: aa94f2888825 ("staging: comedi: ni_660x: tidy up ni_660x_set_pfi_routing()")
> Cc: stable@...r.kernel.org
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> ---
> Changes in v2:
>   - Fix Fixes tag.
> 
>   drivers/staging/comedi/drivers/ni_660x.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/staging/comedi/drivers/ni_660x.c b/drivers/staging/comedi/drivers/ni_660x.c
> index e70a461e723f..405573e927cf 100644
> --- a/drivers/staging/comedi/drivers/ni_660x.c
> +++ b/drivers/staging/comedi/drivers/ni_660x.c
> @@ -656,6 +656,7 @@ static int ni_660x_set_pfi_routing(struct comedi_device *dev,
>   	case NI_660X_PFI_OUTPUT_DIO:
>   		if (chan > 31)
>   			return -EINVAL;
> +		break;
>   	default:
>   		return -EINVAL;
>   	}
> 

Thanks for the bug fix!

Reviewed-by: Ian Abbott <abbotti@....co.uk>

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