linux-kernel - Re: [PATCH 06/41] scsi: aic7xxx: mark expected switch fall-throughs

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Date:   Wed, 19 Dec 2018 09:37:08 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Hannes Reinecke <hare@...e.com>
Cc:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/41] scsi: aic7xxx: mark expected switch fall-throughs

Hi,

Friendly ping:

Who can ack or review this patch, please?

Thanks
--
Gustavo

On 11/27/18 10:26 PM, Gustavo A. R. Silva wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch cases
> where we are expecting to fall through.
> 
> Notice that, in some cases, I replaced "FALLTHROUGH" with a "fall through"
> annotation and then placed it at the bottom of the corresponding switch
> case, which is what GCC is expecting to find.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> ---
>   drivers/scsi/aic7xxx/aic7xxx_core.c | 12 +++++++++---
>   1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/scsi/aic7xxx/aic7xxx_core.c b/drivers/scsi/aic7xxx/aic7xxx_core.c
> index f3362f4ab16e..d4a7263e4b8f 100644
> --- a/drivers/scsi/aic7xxx/aic7xxx_core.c
> +++ b/drivers/scsi/aic7xxx/aic7xxx_core.c
> @@ -4920,24 +4920,30 @@ ahc_fini_scbdata(struct ahc_softc *ahc)
>   		}
>   		ahc_dma_tag_destroy(ahc, scb_data->sg_dmat);
>   	}
> +		/* fall through */
>   	case 6:
>   		ahc_dmamap_unload(ahc, scb_data->sense_dmat,
>   				  scb_data->sense_dmamap);
> +		/* fall through */
>   	case 5:
>   		ahc_dmamem_free(ahc, scb_data->sense_dmat, scb_data->sense,
>   				scb_data->sense_dmamap);
>   		ahc_dmamap_destroy(ahc, scb_data->sense_dmat,
>   				   scb_data->sense_dmamap);
> +		/* fall through */
>   	case 4:
>   		ahc_dma_tag_destroy(ahc, scb_data->sense_dmat);
> +		/* fall through */
>   	case 3:
>   		ahc_dmamap_unload(ahc, scb_data->hscb_dmat,
>   				  scb_data->hscb_dmamap);
> +		/* fall through */
>   	case 2:
>   		ahc_dmamem_free(ahc, scb_data->hscb_dmat, scb_data->hscbs,
>   				scb_data->hscb_dmamap);
>   		ahc_dmamap_destroy(ahc, scb_data->hscb_dmat,
>   				   scb_data->hscb_dmamap);
> +		/* fall through */
>   	case 1:
>   		ahc_dma_tag_destroy(ahc, scb_data->hscb_dmat);
>   		break;
> @@ -6002,8 +6008,8 @@ ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel,
>   				if ((scb->flags & SCB_ACTIVE) == 0)
>   					printk("Inactive SCB in Waiting List\n");
>   				ahc_done(ahc, scb);
> -				/* FALLTHROUGH */
>   			}
> +				/* fall through */
>   			case SEARCH_REMOVE:
>   				next = ahc_rem_wscb(ahc, next, prev);
>   				break;
> @@ -7008,8 +7014,8 @@ ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts)
>   		}
>   		address -= address_offset;
>   		fmt3_ins->address = address;
> -		/* FALLTHROUGH */
>   	}
> +		/* fall through */
>   	case AIC_OP_OR:
>   	case AIC_OP_AND:
>   	case AIC_OP_XOR:
> @@ -7035,7 +7041,7 @@ ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts)
>   			fmt1_ins->opcode = AIC_OP_AND;
>   			fmt1_ins->immediate = 0xff;
>   		}
> -		/* FALLTHROUGH */
> +		/* fall through */
>   	case AIC_OP_ROL:
>   		if ((ahc->features & AHC_ULTRA2) != 0) {
>   			int i, count;
>