treewide: 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/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

6 files changed, 11 insertions, 11 deletions

diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index a9d9c1cdf546..a5983d515db0 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -1515,10 +1515,10 @@ static unsigned long dsiclk_rate(u8 n)
 	switch (divsel) {
 	case PRCM_DSI_PLLOUT_SEL_PHI_4:
 		div *= 2;
-		/* Fall through */
+		fallthrough;
 	case PRCM_DSI_PLLOUT_SEL_PHI_2:
 		div *= 2;
-		/* Fall through */
+		fallthrough;
 	case PRCM_DSI_PLLOUT_SEL_PHI:
 		return pll_rate(PRCM_PLLDSI_FREQ, clock_rate(PRCMU_HDMICLK),
 			PLL_RAW) / div;
diff --git a/drivers/mfd/iqs62x.c b/drivers/mfd/iqs62x.c
index af764bc87d7c..761b4ef3a381 100644
--- a/drivers/mfd/iqs62x.c
+++ b/drivers/mfd/iqs62x.c
@@ -136,7 +136,7 @@ static int iqs62x_dev_init(struct iqs62x_core *iqs62x)
 		if (val & IQS620_PROX_SETTINGS_4_SAR_EN)
 			iqs62x->ui_sel = IQS62X_UI_SAR1;
 
-		/* fall through */
+		fallthrough;
 
 	case IQS621_PROD_NUM:
 		ret = regmap_write(iqs62x->regmap, IQS620_GLBL_EVENT_MASK,
@@ -470,7 +470,7 @@ static irqreturn_t iqs62x_irq(int irq, void *context)
 		case IQS62X_EVENT_UI_LO:
 			event_data.ui_data = get_unaligned_le16(&event_map[i]);
 
-			/* fall through */
+			fallthrough;
 
 		case IQS62X_EVENT_UI_HI:
 		case IQS62X_EVENT_NONE:
@@ -491,7 +491,7 @@ static irqreturn_t iqs62x_irq(int irq, void *context)
 		case IQS62X_EVENT_HYST:
 			event_map[i] <<= iqs62x->dev_desc->hyst_shift;
 
-			/* fall through */
+			fallthrough;
 
 		case IQS62X_EVENT_WHEEL:
 		case IQS62X_EVENT_HALL:
diff --git a/drivers/mfd/mxs-lradc.c b/drivers/mfd/mxs-lradc.c
index 5bef142c4835..111d11fd25aa 100644
--- a/drivers/mfd/mxs-lradc.c
+++ b/drivers/mfd/mxs-lradc.c
@@ -172,7 +172,7 @@ static int mxs_lradc_probe(struct platform_device *pdev)
 					MXS_LRADC_TOUCHSCREEN_5WIRE;
 				break;
 			}
-			/* fall through - to an error message for i.MX23 */
+			fallthrough;	/* to an error message for i.MX23 */
 		default:
 			dev_err(&pdev->dev,
 				"Unsupported number of touchscreen wires (%d)\n"
diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 1e6431cb8536..2a3a240b4619 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -308,7 +308,7 @@ static int usbhs_runtime_resume(struct device *dev)
 					 i, r);
 				}
 			}
-		/* Fall through - as HSIC mode needs utmi_clk */
+			fallthrough;	/* as HSIC mode needs utmi_clk */
 
 		case OMAP_EHCI_PORT_MODE_TLL:
 			if (!IS_ERR(omap->utmi_clk[i])) {
@@ -344,7 +344,7 @@ static int usbhs_runtime_suspend(struct device *dev)
 
 			if (!IS_ERR(omap->hsic480m_clk[i]))
 				clk_disable_unprepare(omap->hsic480m_clk[i]);
-		/* Fall through - as utmi_clks were used in HSIC mode */
+			fallthrough;	/* as utmi_clks were used in HSIC mode */
 
 		case OMAP_EHCI_PORT_MODE_TLL:
 			if (!IS_ERR(omap->utmi_clk[i]))
diff --git a/drivers/mfd/rave-sp.c b/drivers/mfd/rave-sp.c
index abaab541df19..545196c85b5c 100644
--- a/drivers/mfd/rave-sp.c
+++ b/drivers/mfd/rave-sp.c
@@ -270,7 +270,7 @@ static void *stuff(unsigned char *dest, const unsigned char *src, size_t n)
 		case RAVE_SP_ETX:
 		case RAVE_SP_DLE:
 			*dest++ = RAVE_SP_DLE;
-			/* FALLTHROUGH */
+			fallthrough;
 		default:
 			*dest++ = byte;
 		}
@@ -541,7 +541,7 @@ static int rave_sp_receive_buf(struct serdev_device *serdev,
 			 * deframer buffer
 			 */
 
-			/* FALLTHROUGH */
+			fallthrough;
 
 		case RAVE_SP_EXPECT_ESCAPED_DATA:
 			if (deframer->length == sizeof(deframer->data)) {
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index 75859e492984..df5cebb372a5 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -95,7 +95,7 @@ static struct syscon *of_syscon_register(struct device_node *np, bool check_clk)
 			break;
 		default:
 			pr_err("Failed to retrieve valid hwlock: %d\n", ret);
-			/* fall-through */
+			fallthrough;
 		case -EPROBE_DEFER:
 			goto err_regmap;
 		}