linux-kernel - [PATCH 05/41] scsi: aic7xxx: aic79xx: mark expected switch fall-through

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Date:   Tue, 27 Nov 2018 22:26:19 -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,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH 05/41] scsi: aic7xxx: aic79xx: mark expected switch
 fall-through

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.

Addresses-Coverity-ID: 114961 ("Missing break in switch")
Addresses-Coverity-ID: 114962 ("Missing break in switch")
Addresses-Coverity-ID: 114963 ("Missing break in switch")
Addresses-Coverity-ID: 114964 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/scsi/aic7xxx/aic79xx_core.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/aic7xxx/aic79xx_core.c b/drivers/scsi/aic7xxx/aic79xx_core.c
index 9ee75c9a9aa1..7e5044bf05c0 100644
--- a/drivers/scsi/aic7xxx/aic79xx_core.c
+++ b/drivers/scsi/aic7xxx/aic79xx_core.c
@@ -2285,6 +2285,7 @@ ahd_handle_seqint(struct ahd_softc *ahd, u_int intstat)
 			switch (scb->hscb->task_management) {
 			case SIU_TASKMGMT_ABORT_TASK:
 				tag = SCB_GET_TAG(scb);
+				/* fall through */
 			case SIU_TASKMGMT_ABORT_TASK_SET:
 			case SIU_TASKMGMT_CLEAR_TASK_SET:
 				lun = scb->hscb->lun;
@@ -2295,6 +2296,7 @@ ahd_handle_seqint(struct ahd_softc *ahd, u_int intstat)
 				break;
 			case SIU_TASKMGMT_LUN_RESET:
 				lun = scb->hscb->lun;
+				/* fall through */
 			case SIU_TASKMGMT_TARGET_RESET:
 			{
 				struct ahd_devinfo devinfo;
@@ -6550,8 +6552,8 @@ ahd_fini_scbdata(struct ahd_softc *ahd)
 			kfree(sns_map);
 		}
 		ahd_dma_tag_destroy(ahd, scb_data->sense_dmat);
-		/* FALLTHROUGH */
 	}
+		/* fall through */
 	case 6:
 	{
 		struct map_node *sg_map;
@@ -6565,8 +6567,8 @@ ahd_fini_scbdata(struct ahd_softc *ahd)
 			kfree(sg_map);
 		}
 		ahd_dma_tag_destroy(ahd, scb_data->sg_dmat);
-		/* FALLTHROUGH */
 	}
+		/* fall through */
 	case 5:
 	{
 		struct map_node *hscb_map;
@@ -7209,6 +7211,7 @@ ahd_init(struct ahd_softc *ahd)
 		case FLX_CSTAT_OVER:
 		case FLX_CSTAT_UNDER:
 			warn_user++;
+			/* fall through */
 		case FLX_CSTAT_INVALID:
 		case FLX_CSTAT_OKAY:
 			if (warn_user == 0 && bootverbose == 0)
@@ -8413,7 +8416,7 @@ ahd_search_scb_list(struct ahd_softc *ahd, int target, char channel,
 			if ((scb->flags & SCB_ACTIVE) == 0)
 				printk("Inactive SCB in Waiting List\n");
 			ahd_done_with_status(ahd, scb, status);
-			/* FALLTHROUGH */
+			/* fall through */
 		case SEARCH_REMOVE:
 			ahd_rem_wscb(ahd, scbid, prev, next, tid);
 			*list_tail = prev;
@@ -8422,6 +8425,7 @@ ahd_search_scb_list(struct ahd_softc *ahd, int target, char channel,
 			break;
 		case SEARCH_PRINT:
 			printk("0x%x ", scbid);
+			/* fall through */
 		case SEARCH_COUNT:
 			prev = scbid;
 			break;
@@ -9547,8 +9551,8 @@ ahd_download_instr(struct ahd_softc *ahd, u_int instrptr, uint8_t *dconsts)
 	{
 		fmt3_ins = &instr.format3;
 		fmt3_ins->address = ahd_resolve_seqaddr(ahd, fmt3_ins->address);
-		/* FALLTHROUGH */
 	}
+		/* fall through */
 	case AIC_OP_OR:
 	case AIC_OP_AND:
 	case AIC_OP_XOR:
@@ -9559,7 +9563,7 @@ ahd_download_instr(struct ahd_softc *ahd, u_int instrptr, uint8_t *dconsts)
 			fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
 		}
 		fmt1_ins->parity = 0;
-		/* FALLTHROUGH */
+		/* fall through */
 	case AIC_OP_ROL:
 	{
 		int i, count;
-- 
2.17.1