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RE: [PATCH] mtd: cfi_cmdset_0002: Mark expected switch fall-throughs




Reviewed-by: Tokunori Ikegami <ikegami.t@xxxxxxxxx>

> -----Original Message-----
> From: linux-mtd [mailto:linux-mtd-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf
> Of Gustavo A. R. Silva
> Sent: Saturday, February 9, 2019 3:06 AM
> To: David Woodhouse; Brian Norris; Boris Brezillon; Marek Vasut; Richard
> Weinberger
> Cc: linux-mtd@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Gustavo
> A. R. Silva
> Subject: [PATCH] mtd: cfi_cmdset_0002: Mark expected switch fall-throughs
> 
> In preparation to enabling -Wimplicit-fallthrough, mark switch
> cases where we are expecting to fall through.
> 
> This patch fixes the following warnings:
> 
> drivers/mtd/chips/cfi_cmdset_0002.c: In function ‘get_chip’:
> drivers/mtd/chips/cfi_cmdset_0002.c:870:6: warning: this statement may
> fall through [-Wimplicit-fallthrough=]
>    if (mode == FL_READY && chip->oldstate == FL_READY)
>       ^
> drivers/mtd/chips/cfi_cmdset_0002.c:873:2: note: here
>   default:
>   ^~~~~~~
> drivers/mtd/chips/cfi_cmdset_0002.c: In function ‘cfi_amdstd_sync’:
> drivers/mtd/chips/cfi_cmdset_0002.c:2745:16: warning: this statement may
> fall through [-Wimplicit-fallthrough=]
>     chip->state = FL_SYNCING;
>     ~~~~~~~~~~~~^~~~~~~~~~~~
> drivers/mtd/chips/cfi_cmdset_0002.c:2750:3: note: here
>    case FL_SYNCING:
>    ^~~~
> 
> Warning level 3 was used: -Wimplicit-fallthrough=3
> 
> This patch is part of the ongoing efforts to enabling
> -Wimplicit-fallthrough.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
> ---
>  drivers/mtd/chips/cfi_cmdset_0002.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c
> b/drivers/mtd/chips/cfi_cmdset_0002.c
> index 72428b6bfc47..0b0a1874d3bf 100644
> --- a/drivers/mtd/chips/cfi_cmdset_0002.c
> +++ b/drivers/mtd/chips/cfi_cmdset_0002.c
> @@ -869,6 +869,7 @@ static int get_chip(struct map_info *map, struct flchip
> *chip, unsigned long adr
>  		/* Only if there's no operation suspended... */
>  		if (mode == FL_READY && chip->oldstate == FL_READY)
>  			return 0;
> +		/* fall through */
> 
>  	default:
>  	sleep:
> @@ -2747,6 +2748,7 @@ static void cfi_amdstd_sync (struct mtd_info *mtd)
>  			 * as the whole point is that nobody can do anything
>  			 * with the chip now anyway.
>  			 */
> +			/* fall through */
>  		case FL_SYNCING:
>  			mutex_unlock(&chip->mutex);
>  			break;
> --
> 2.20.1
> 
> 
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