Re: [oss-drivers] [trivial PATCH] treewide: Convert switch/case fallthrough; to break;

Simon Horman
2020-09-17T08:03:35Z

On Wed, Sep 09, 2020 at 01:06:39PM -0700, Joe Perches wrote:
> fallthrough to a separate case/default label break; isn't very readable.
>
> Convert pseudo-keyword fallthrough; statements to a simple break; when
> the next label is case or default and the only statement in the next
> label block is break;
>
> Found using:
>
> $ grep-2.5.4 -rP --include=*.[ch] -n "fallthrough;(\s*(case\s+\w+|default)\s*:\s*){1,7}break;" *
>
> Miscellanea:
>
> o Move or coalesce a couple label blocks above a default: block.
>
> Signed-off-by: Joe Perches <joe@perches.com>

...

> diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.c
> index 252fe06f58aa..1d5b87079104 100644
> --- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.c
> +++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.c
> @@ -345,7 +345,7 @@ static int matching_bar(struct nfp_bar *bar, u32 tgt, u32 act, u32 tok,
> baract = NFP_CPP_ACTION_RW;
> if (act == 0)
> act = NFP_CPP_ACTION_RW;
> - fallthrough;
> + break;
> case NFP_PCIE_BAR_PCIE2CPP_MapType_FIXED:
> break;
> default:

This is a cascading fall-through handling all map types.
I don't think this change improves readability.

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