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>

4 files changed, 25 insertions, 18 deletions

diff --git a/drivers/input/joystick/db9.c b/drivers/input/joystick/db9.c
index a7bc576eb342..434d265fa2e8 100644
--- a/drivers/input/joystick/db9.c
+++ b/drivers/input/joystick/db9.c
@@ -247,7 +247,7 @@ static unsigned char db9_saturn_read_packet(struct parport *port, unsigned char
 			db9_saturn_write_sub(port, type, 3, powered, 0);
 			return data[0] = 0xe3;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		return data[0];
 	}
@@ -267,14 +267,14 @@ static int db9_saturn_report(unsigned char id, unsigned char data[60], struct in
 		switch (data[j]) {
 		case 0x16: /* multi controller (analog 4 axis) */
 			input_report_abs(dev, db9_abs[5], data[j + 6]);
-			/* fall through */
+			fallthrough;
 		case 0x15: /* mission stick (analog 3 axis) */
 			input_report_abs(dev, db9_abs[3], data[j + 4]);
 			input_report_abs(dev, db9_abs[4], data[j + 5]);
-			/* fall through */
+			fallthrough;
 		case 0x13: /* racing controller (analog 1 axis) */
 			input_report_abs(dev, db9_abs[2], data[j + 3]);
-			/* fall through */
+			fallthrough;
 		case 0x34: /* saturn keyboard (udlr ZXC ASD QE Esc) */
 		case 0x02: /* digital pad (digital 2 axis + buttons) */
 			input_report_abs(dev, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
@@ -368,7 +368,7 @@ static void db9_timer(struct timer_list *t)
 			input_report_abs(dev2, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
 			input_report_abs(dev2, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
 			input_report_key(dev2, BTN_TRIGGER, ~data & DB9_FIRE1);
-			/* fall through */
+			fallthrough;
 
 		case DB9_MULTI_0802:
 
diff --git a/drivers/input/joystick/gamecon.c b/drivers/input/joystick/gamecon.c
index e0a362be5812..88df68cc4ac6 100644
--- a/drivers/input/joystick/gamecon.c
+++ b/drivers/input/joystick/gamecon.c
@@ -485,7 +485,7 @@ static void gc_multi_process_packet(struct gc *gc)
 		switch (pad->type) {
 		case GC_MULTI2:
 			input_report_key(dev, BTN_THUMB, s & data[5]);
-			/* fall through */
+			fallthrough;
 
 		case GC_MULTI:
 			input_report_abs(dev, ABS_X,
@@ -638,7 +638,7 @@ static void gc_psx_report_one(struct gc_pad *pad, unsigned char psx_type,
 
 		input_report_key(dev, BTN_THUMBL, ~data[0] & 0x04);
 		input_report_key(dev, BTN_THUMBR, ~data[0] & 0x02);
-		/* fall through */
+		fallthrough;
 
 	case GC_PSX_NEGCON:
 	case GC_PSX_ANALOG:
@@ -872,7 +872,8 @@ static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
 	case GC_SNES:
 		for (i = 4; i < 8; i++)
 			input_set_capability(input_dev, EV_KEY, gc_snes_btn[i]);
-		/* fall through */
+		fallthrough;
+
 	case GC_NES:
 		for (i = 0; i < 4; i++)
 			input_set_capability(input_dev, EV_KEY, gc_snes_btn[i]);
@@ -880,7 +881,8 @@ static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
 
 	case GC_MULTI2:
 		input_set_capability(input_dev, EV_KEY, BTN_THUMB);
-		/* fall through */
+		fallthrough;
+
 	case GC_MULTI:
 		input_set_capability(input_dev, EV_KEY, BTN_TRIGGER);
 		/* fall through */
diff --git a/drivers/input/joystick/sidewinder.c b/drivers/input/joystick/sidewinder.c
index 1777e68c9f02..fac91ea14f17 100644
--- a/drivers/input/joystick/sidewinder.c
+++ b/drivers/input/joystick/sidewinder.c
@@ -656,16 +656,19 @@ static int sw_connect(struct gameport *gameport, struct gameport_driver *drv)
 
 			switch (i * m) {
 				case 60:
-					sw->number++;			/* fall through */
+					sw->number++;
+					fallthrough;
 				case 45:				/* Ambiguous packet length */
 					if (j <= 40) {			/* ID length less or eq 40 -> FSP */
 				case 43:
 						sw->type = SW_ID_FSP;
 						break;
 					}
-					sw->number++;			/* fall through */
+					sw->number++;
+					fallthrough;
 				case 30:
-					sw->number++;			/* fall through */
+					sw->number++;
+					fallthrough;
 				case 15:
 					sw->type = SW_ID_GP;
 					break;
@@ -681,9 +684,11 @@ static int sw_connect(struct gameport *gameport, struct gameport_driver *drv)
 						sw->type = SW_ID_PP;
 					break;
 				case 66:
-					sw->bits = 3;			/* fall through */
+					sw->bits = 3;
+					fallthrough;
 				case 198:
-					sw->length = 22;		/* fall through */
+					sw->length = 22;
+					fallthrough;
 				case 64:
 					sw->type = SW_ID_3DP;
 					if (j == 160)
diff --git a/drivers/input/joystick/spaceball.c b/drivers/input/joystick/spaceball.c
index cf7cbcd0c29d..429411c6c0a8 100644
--- a/drivers/input/joystick/spaceball.c
+++ b/drivers/input/joystick/spaceball.c
@@ -146,7 +146,7 @@ static irqreturn_t spaceball_interrupt(struct serio *serio,
 				break;
 			}
 			spaceball->escape = 0;
-			/* fall through */
+			fallthrough;
 		case 'M':
 		case 'Q':
 		case 'S':
@@ -154,7 +154,7 @@ static irqreturn_t spaceball_interrupt(struct serio *serio,
 				spaceball->escape = 0;
 				data &= 0x1f;
 			}
-			/* fall through */
+			fallthrough;
 		default:
 			if (spaceball->escape)
 				spaceball->escape = 0;
@@ -220,13 +220,13 @@ static int spaceball_connect(struct serio *serio, struct serio_driver *drv)
 			input_dev->keybit[BIT_WORD(BTN_A)] |= BIT_MASK(BTN_A) |
 				BIT_MASK(BTN_B) | BIT_MASK(BTN_C) |
 				BIT_MASK(BTN_MODE);
-			/* fall through */
+			fallthrough;
 		default:
 			input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_2) |
 				BIT_MASK(BTN_3) | BIT_MASK(BTN_4) |
 				BIT_MASK(BTN_5) | BIT_MASK(BTN_6) |
 				BIT_MASK(BTN_7) | BIT_MASK(BTN_8);
-			/* fall through */
+			fallthrough;
 		case SPACEBALL_3003C:
 			input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_1) |
 				BIT_MASK(BTN_8);