IB/hfi1: Remove unnecessary fall-through markings

Reorganize the code a bit in a more standard way[1] and remove
unnecessary fall-through markings.

[1] https://lore.kernel.org/lkml/20200708054703.GR207186@unreal/

Link: https://lore.kernel.org/r/20200709235250.GA26678@embeddedorSigned-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/hfi1/chip.c

@@ -7317,11 +7317,11 @@ static u16 link_width_to_bits(struct hfi1_devdata *dd, u16 width)
 	case 1: return OPA_LINK_WIDTH_1X;
 	case 2: return OPA_LINK_WIDTH_2X;
 	case 3: return OPA_LINK_WIDTH_3X;
+	case 4: return OPA_LINK_WIDTH_4X;
 	default:
 		dd_dev_info(dd, "%s: invalid width %d, using 4\n",
 			    __func__, width);
-		/* fall through */
-	case 4: return OPA_LINK_WIDTH_4X;
+		return OPA_LINK_WIDTH_4X;
 	}
 }
 
@@ -7376,12 +7376,13 @@ static void get_link_widths(struct hfi1_devdata *dd, u16 *tx_width,
 		case 0:
 			dd->pport[0].link_speed_active = OPA_LINK_SPEED_12_5G;
 			break;
+		case 1:
+			dd->pport[0].link_speed_active = OPA_LINK_SPEED_25G;
+			break;
 		default:
 			dd_dev_err(dd,
 				   "%s: unexpected max rate %d, using 25Gb\n",
 				   __func__, (int)max_rate);
-			/* fall through */
-		case 1:
 			dd->pport[0].link_speed_active = OPA_LINK_SPEED_25G;
 			break;
 		}
@@ -12878,11 +12879,6 @@ static int init_cntrs(struct hfi1_devdata *dd)
 static u32 chip_to_opa_lstate(struct hfi1_devdata *dd, u32 chip_lstate)
 {
 	switch (chip_lstate) {
-	default:
-		dd_dev_err(dd,
-			   "Unknown logical state 0x%x, reporting IB_PORT_DOWN\n",
-			   chip_lstate);
-		/* fall through */
 	case LSTATE_DOWN:
 		return IB_PORT_DOWN;
 	case LSTATE_INIT:
@@ -12891,6 +12887,11 @@ static u32 chip_to_opa_lstate(struct hfi1_devdata *dd, u32 chip_lstate)
 		return IB_PORT_ARMED;
 	case LSTATE_ACTIVE:
 		return IB_PORT_ACTIVE;
+	default:
+		dd_dev_err(dd,
+			   "Unknown logical state 0x%x, reporting IB_PORT_DOWN\n",
+			   chip_lstate);
+		return IB_PORT_DOWN;
 	}
 }
 
@@ -12898,10 +12899,6 @@ u32 chip_to_opa_pstate(struct hfi1_devdata *dd, u32 chip_pstate)
 {
 	/* look at the HFI meta-states only */
 	switch (chip_pstate & 0xf0) {
-	default:
-		dd_dev_err(dd, "Unexpected chip physical state of 0x%x\n",
-			   chip_pstate);
-		/* fall through */
 	case PLS_DISABLED:
 		return IB_PORTPHYSSTATE_DISABLED;
 	case PLS_OFFLINE:
@@ -12914,6 +12911,10 @@ u32 chip_to_opa_pstate(struct hfi1_devdata *dd, u32 chip_pstate)
 		return IB_PORTPHYSSTATE_LINKUP;
 	case PLS_PHYTEST:
 		return IB_PORTPHYSSTATE_PHY_TEST;
+	default:
+		dd_dev_err(dd, "Unexpected chip physical state of 0x%x\n",
+			   chip_pstate);
+		return IB_PORTPHYSSTATE_DISABLED;
 	}
 }