Input: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20200707180857.GA30600@embeddedor
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

9 files changed, 13 insertions, 15 deletions

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index 3f06e8a495d8..bfa26651c0be 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -458,7 +458,7 @@ static int atp_status_check(struct urb *urb)
 				dev->info->datalen, dev->urb->actual_length);
 			dev->overflow_warned = true;
 		}
-		/* fall through */
+		fallthrough;
 	case -ECONNRESET:
 	case -ENOENT:
 	case -ESHUTDOWN:
diff --git a/drivers/input/mouse/cyapa_gen3.c b/drivers/input/mouse/cyapa_gen3.c
index 00e395dfc3d5..a0361f9325f8 100644
--- a/drivers/input/mouse/cyapa_gen3.c
+++ b/drivers/input/mouse/cyapa_gen3.c
@@ -1067,7 +1067,7 @@ static int cyapa_gen3_do_operational_check(struct cyapa *cyapa)
 			return error;
 		}
 
-	/* Fall through */
+		fallthrough;
 	case CYAPA_STATE_BL_IDLE:
 		/* Try to get firmware version in bootloader mode. */
 		cyapa_gen3_bl_query_data(cyapa);
@@ -1078,7 +1078,7 @@ static int cyapa_gen3_do_operational_check(struct cyapa *cyapa)
 			return error;
 		}
 
-	/* Fall through */
+		fallthrough;
 	case CYAPA_STATE_OP:
 		/*
 		 * Reading query data before going back to the full mode
diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cyapa_gen5.c
index 7f012bfa2658..bb3a63d1268d 100644
--- a/drivers/input/mouse/cyapa_gen5.c
+++ b/drivers/input/mouse/cyapa_gen5.c
@@ -2554,7 +2554,7 @@ static int cyapa_gen5_do_operational_check(struct cyapa *cyapa)
 		}
 
 		cyapa->state = CYAPA_STATE_GEN5_APP;
-		/* fall through */
+		fallthrough;
 
 	case CYAPA_STATE_GEN5_APP:
 		/*
diff --git a/drivers/input/mouse/cyapa_gen6.c b/drivers/input/mouse/cyapa_gen6.c
index c1b524ab4623..7eba66fbef58 100644
--- a/drivers/input/mouse/cyapa_gen6.c
+++ b/drivers/input/mouse/cyapa_gen6.c
@@ -680,7 +680,7 @@ static int cyapa_gen6_operational_check(struct cyapa *cyapa)
 		}
 
 		cyapa->state = CYAPA_STATE_GEN6_APP;
-		/* fall through */
+		fallthrough;
 
 	case CYAPA_STATE_GEN6_APP:
 		/*
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index e4f394cc0520..90f8765f9efc 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -383,7 +383,7 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
 		 */
 		if (packet[3] & 0x80)
 			fingers = 4;
-		/* fall through */
+		fallthrough;
 	case 1:
 		/*
 		 * byte 1:  .   .   .   .  x11 x10 x9  x8
@@ -1146,7 +1146,7 @@ static int elantech_set_input_params(struct psmouse *psmouse)
 	case 2:
 		__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
 		__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
-		/* fall through */
+		fallthrough;
 	case 3:
 		if (info->hw_version == 3)
 			elantech_set_buttonpad_prop(psmouse);
@@ -1877,12 +1877,10 @@ static bool elantech_use_host_notify(struct psmouse *psmouse,
 		/* expected case */
 		break;
 	case ETP_BUS_SMB_ALERT_ONLY:
-		/* fall-through  */
 	case ETP_BUS_PS2_SMB_ALERT:
 		psmouse_dbg(psmouse, "Ignoring SMBus provider through alert protocol.\n");
 		break;
 	case ETP_BUS_SMB_HST_NTFY_ONLY:
-		/* fall-through  */
 	case ETP_BUS_PS2_SMB_HST_NTFY:
 		return true;
 	default:
diff --git a/drivers/input/mouse/hgpk.c b/drivers/input/mouse/hgpk.c
index 72a083f3fc4a..4dc441309aac 100644
--- a/drivers/input/mouse/hgpk.c
+++ b/drivers/input/mouse/hgpk.c
@@ -238,7 +238,7 @@ static void hgpk_spewing_hack(struct psmouse *psmouse,
 		/* we're not spewing, but this packet might be the start */
 		priv->spew_flag = MAYBE_SPEWING;
 
-		/* fall-through */
+		fallthrough;
 
 	case MAYBE_SPEWING:
 		priv->spew_count++;
@@ -249,7 +249,7 @@ static void hgpk_spewing_hack(struct psmouse *psmouse,
 		/* excessive spew detected, request recalibration */
 		priv->spew_flag = SPEW_DETECTED;
 
-		/* fall-through */
+		fallthrough;
 
 	case SPEW_DETECTED:
 		/* only recalibrate when the overall delta to the cursor
diff --git a/drivers/input/mouse/navpoint.c b/drivers/input/mouse/navpoint.c
index 0b75248c8380..c112980c2341 100644
--- a/drivers/input/mouse/navpoint.c
+++ b/drivers/input/mouse/navpoint.c
@@ -105,7 +105,7 @@ static void navpoint_packet(struct navpoint *navpoint)
 	case 0x19:	/* Module 0, Hello packet */
 		if ((navpoint->data[1] & 0xf0) == 0x10)
 			break;
-		/* FALLTHROUGH */
+		fallthrough;
 	default:
 		dev_warn(navpoint->dev,
 			 "spurious packet: data=0x%02x,0x%02x,...\n",
diff --git a/drivers/input/mouse/sentelic.c b/drivers/input/mouse/sentelic.c
index e99d9bf1a267..9f7ecc72093a 100644
--- a/drivers/input/mouse/sentelic.c
+++ b/drivers/input/mouse/sentelic.c
@@ -794,7 +794,7 @@ static psmouse_ret_t fsp_process_byte(struct psmouse *psmouse)
 		/* on-pad click, filter it if necessary */
 		if ((ad->flags & FSPDRV_FLAG_EN_OPC) != FSPDRV_FLAG_EN_OPC)
 			packet[0] &= ~FSP_PB0_LBTN;
-		/* fall through */
+		fallthrough;
 
 	case FSP_PKT_TYPE_NORMAL:
 		/* normal packet */
diff --git a/drivers/input/mouse/sermouse.c b/drivers/input/mouse/sermouse.c
index ea9242d53899..caa79c177c55 100644
--- a/drivers/input/mouse/sermouse.c
+++ b/drivers/input/mouse/sermouse.c
@@ -128,7 +128,7 @@ static void sermouse_process_ms(struct sermouse *sermouse, signed char data)
 
 				case SERIO_MS:
 					sermouse->type = SERIO_MP;
-					/* fall through */
+					fallthrough;
 
 				case SERIO_MP:
 					if ((data >> 2) & 3) break;	/* M++ Wireless Extension packet. */
@@ -139,7 +139,7 @@ static void sermouse_process_ms(struct sermouse *sermouse, signed char data)
 				case SERIO_MZP:
 				case SERIO_MZPP:
 					input_report_key(dev, BTN_SIDE,   (data >> 5) & 1);
-					/* fall through */
+					fallthrough;
 
 				case SERIO_MZ:
 					input_report_key(dev, BTN_MIDDLE, (data >> 4) & 1);