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* [RFC] treewide: cleanup unreachable breaks
@ 2020-10-17 16:09 trix
  2020-10-17 16:24 ` Martin Blumenstingl
                   ` (5 more replies)
  0 siblings, 6 replies; 20+ messages in thread
From: trix @ 2020-10-17 16:09 UTC (permalink / raw)
  To: linux-kernel
  Cc: linux-edac, linux-acpi, linux-pm, xen-devel, linux-block,
	openipmi-developer, linux-crypto, linux-arm-kernel, linux-power,
	linux-gpio, amd-gfx, dri-devel, nouveau, virtualization,
	spice-devel, linux-iio, linux-amlogic, industrypack-devel,
	linux-media, MPT-FusionLinux.pdl, linux-scsi, linux-mtd,
	linux-can, netdev, intel-wired-lan, ath10k, linux-wireless,
	linux-stm32, linux-nfc, linux-nvdimm, linux-pci,
	linux-samsung-soc, platform-driver-x86, patches, storagedev,
	devel, linux-serial, linux-usb, usb-storage, linux-watchdog,
	ocfs2-devel, bpf, linux-integrity, linux-security-module,
	keyrings, alsa-devel, clang-built-linux, Tom Rix

From: Tom Rix <trix@redhat.com>

This is a upcoming change to clean up a new warning treewide.
I am wondering if the change could be one mega patch (see below) or
normal patch per file about 100 patches or somewhere half way by collecting
early acks.

clang has a number of useful, new warnings see
https://clang.llvm.org/docs/DiagnosticsReference.html

This change cleans up -Wunreachable-code-break
https://clang.llvm.org/docs/DiagnosticsReference.html#wunreachable-code-break
for 266 of 485 warnings in this week's linux-next, allyesconfig on x86_64.

The method of fixing was to look for warnings where the preceding statement
was a simple statement and by inspection made the subsequent break unneeded.
In order of frequency these look like

return and break

 	switch (c->x86_vendor) {
 	case X86_VENDOR_INTEL:
 		intel_p5_mcheck_init(c);
 		return 1;
-		break;

goto and break

 	default:
 		operation = 0; /* make gcc happy */
 		goto fail_response;
-		break;

break and break
 		case COLOR_SPACE_SRGB:
 			/* by pass */
 			REG_SET(OUTPUT_CSC_CONTROL, 0,
 				OUTPUT_CSC_GRPH_MODE, 0);
 			break;
-			break;

The exception to the simple statement, is a switch case with a block
and the end of block is a return

 			struct obj_buffer *buff = r->ptr;
 			return scnprintf(str, PRIV_STR_SIZE,
 					"size=%u\naddr=0x%X\n", buff->size,
 					buff->addr);
 		}
-		break;

Not considered obvious and excluded, breaks after
multi level switches
complicated if-else if-else blocks
panic() or similar calls

And there is an odd addition of a 'fallthrough' in drivers/tty/nozomi.c

Tom

---

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 1c08cb9eb9f6..16ce86aed8e2 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -1809,15 +1809,13 @@ static int __mcheck_cpu_ancient_init(struct cpuinfo_x86 *c)
 
 	switch (c->x86_vendor) {
 	case X86_VENDOR_INTEL:
 		intel_p5_mcheck_init(c);
 		return 1;
-		break;
 	case X86_VENDOR_CENTAUR:
 		winchip_mcheck_init(c);
 		return 1;
-		break;
 	default:
 		return 0;
 	}
 
 	return 0;
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 3f6b137ef4e6..3d4a48336084 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -213,11 +213,10 @@ static unsigned int __verify_patch_size(u8 family, u32 sh_psize, size_t buf_size
 		max_size = F14H_MPB_MAX_SIZE;
 		break;
 	default:
 		WARN(1, "%s: WTF family: 0x%x\n", __func__, family);
 		return 0;
-		break;
 	}
 
 	if (sh_psize > min_t(u32, buf_size, max_size))
 		return 0;
 
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 838b719ec7ce..d5411a166685 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -102,11 +102,10 @@ acpi_extract_package(union acpi_object *package,
 				printk(KERN_WARNING PREFIX "Invalid package element"
 					      " [%d]: got number, expecting"
 					      " [%c]\n",
 					      i, format_string[i]);
 				return AE_BAD_DATA;
-				break;
 			}
 			break;
 
 		case ACPI_TYPE_STRING:
 		case ACPI_TYPE_BUFFER:
@@ -127,11 +126,10 @@ acpi_extract_package(union acpi_object *package,
 				printk(KERN_WARNING PREFIX "Invalid package element"
 					      " [%d] got string/buffer,"
 					      " expecting [%c]\n",
 					      i, format_string[i]);
 				return AE_BAD_DATA;
-				break;
 			}
 			break;
 		case ACPI_TYPE_LOCAL_REFERENCE:
 			switch (format_string[i]) {
 			case 'R':
@@ -142,22 +140,20 @@ acpi_extract_package(union acpi_object *package,
 				printk(KERN_WARNING PREFIX "Invalid package element"
 					      " [%d] got reference,"
 					      " expecting [%c]\n",
 					      i, format_string[i]);
 				return AE_BAD_DATA;
-				break;
 			}
 			break;
 
 		case ACPI_TYPE_PACKAGE:
 		default:
 			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 					  "Found unsupported element at index=%d\n",
 					  i));
 			/* TBD: handle nested packages... */
 			return AE_SUPPORT;
-			break;
 		}
 	}
 
 	/*
 	 * Validate output buffer.
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 205a06752ca9..c7ac49042cee 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -361,11 +361,10 @@ static pm_callback_t pm_op(const struct dev_pm_ops *ops, pm_message_t state)
 	case PM_EVENT_HIBERNATE:
 		return ops->poweroff;
 	case PM_EVENT_THAW:
 	case PM_EVENT_RECOVER:
 		return ops->thaw;
-		break;
 	case PM_EVENT_RESTORE:
 		return ops->restore;
 #endif /* CONFIG_HIBERNATE_CALLBACKS */
 	}
 
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index adfc9352351d..f769fbd1b4c4 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -1267,11 +1267,10 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
 		operation_flags = REQ_PREFLUSH;
 		break;
 	default:
 		operation = 0; /* make gcc happy */
 		goto fail_response;
-		break;
 	}
 
 	/* Check that the number of segments is sane. */
 	nseg = req->operation == BLKIF_OP_INDIRECT ?
 	       req->u.indirect.nr_segments : req->u.rw.nr_segments;
diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
index f7b1c004a12b..3dd1d5abb298 100644
--- a/drivers/char/ipmi/ipmi_devintf.c
+++ b/drivers/char/ipmi/ipmi_devintf.c
@@ -488,11 +488,10 @@ static long ipmi_ioctl(struct file   *file,
 			rv = -EFAULT;
 			break;
 		}
 
 		return ipmi_set_my_address(priv->user, val.channel, val.value);
-		break;
 	}
 
 	case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD:
 	{
 		struct ipmi_channel_lun_address_set val;
diff --git a/drivers/char/lp.c b/drivers/char/lp.c
index 0ec73917d8dd..862c2fd933c7 100644
--- a/drivers/char/lp.c
+++ b/drivers/char/lp.c
@@ -620,11 +620,10 @@ static int lp_do_ioctl(unsigned int minor, unsigned int cmd,
 		case LPWAIT:
 			LP_WAIT(minor) = arg;
 			break;
 		case LPSETIRQ:
 			return -EINVAL;
-			break;
 		case LPGETIRQ:
 			if (copy_to_user(argp, &LP_IRQ(minor),
 					sizeof(int)))
 				return -EFAULT;
 			break;
diff --git a/drivers/char/mwave/mwavedd.c b/drivers/char/mwave/mwavedd.c
index e43c876a9223..11272d605ecd 100644
--- a/drivers/char/mwave/mwavedd.c
+++ b/drivers/char/mwave/mwavedd.c
@@ -401,11 +401,10 @@ static long mwave_ioctl(struct file *file, unsigned int iocmd,
 		}
 			break;
 	
 		default:
 			return -ENOTTY;
-			break;
 	} /* switch */
 
 	PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_ioctl, exit retval %x\n", retval);
 
 	return retval;
diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c
index 75ccf41a7cb9..0eb6f54e3b66 100644
--- a/drivers/crypto/atmel-sha.c
+++ b/drivers/crypto/atmel-sha.c
@@ -457,11 +457,10 @@ static int atmel_sha_init(struct ahash_request *req)
 		ctx->flags |= SHA_FLAGS_SHA512;
 		ctx->block_size = SHA512_BLOCK_SIZE;
 		break;
 	default:
 		return -EINVAL;
-		break;
 	}
 
 	ctx->bufcnt = 0;
 	ctx->digcnt[0] = 0;
 	ctx->digcnt[1] = 0;
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index fcc08bbf6945..386a3a4cf279 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -2459,38 +2459,30 @@ static int map_err_sym_to_channel(int err_sym, int sym_size)
 	if (sym_size == 4)
 		switch (err_sym) {
 		case 0x20:
 		case 0x21:
 			return 0;
-			break;
 		case 0x22:
 		case 0x23:
 			return 1;
-			break;
 		default:
 			return err_sym >> 4;
-			break;
 		}
 	/* x8 symbols */
 	else
 		switch (err_sym) {
 		/* imaginary bits not in a DIMM */
 		case 0x10:
 			WARN(1, KERN_ERR "Invalid error symbol: 0x%x\n",
 					  err_sym);
 			return -1;
-			break;
-
 		case 0x11:
 			return 0;
-			break;
 		case 0x12:
 			return 1;
-			break;
 		default:
 			return err_sym >> 3;
-			break;
 		}
 	return -1;
 }
 
 static int get_channel_from_ecc_syndrome(struct mem_ctl_info *mci, u16 syndrome)
diff --git a/drivers/gpio/gpio-bd70528.c b/drivers/gpio/gpio-bd70528.c
index 45b3da8da336..931e5765fe92 100644
--- a/drivers/gpio/gpio-bd70528.c
+++ b/drivers/gpio/gpio-bd70528.c
@@ -69,21 +69,18 @@ static int bd70528_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
 	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 		return regmap_update_bits(bdgpio->chip.regmap,
 					  GPIO_OUT_REG(offset),
 					  BD70528_GPIO_DRIVE_MASK,
 					  BD70528_GPIO_OPEN_DRAIN);
-		break;
 	case PIN_CONFIG_DRIVE_PUSH_PULL:
 		return regmap_update_bits(bdgpio->chip.regmap,
 					  GPIO_OUT_REG(offset),
 					  BD70528_GPIO_DRIVE_MASK,
 					  BD70528_GPIO_PUSH_PULL);
-		break;
 	case PIN_CONFIG_INPUT_DEBOUNCE:
 		return bd70528_set_debounce(bdgpio, offset,
 					    pinconf_to_config_argument(config));
-		break;
 	default:
 		break;
 	}
 	return -ENOTSUPP;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c b/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c
index 2a32b66959ba..130a0a0c8332 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c
@@ -1328,11 +1328,10 @@ static bool configure_graphics_mode(
 		case COLOR_SPACE_SRGB:
 			/* by pass */
 			REG_SET(OUTPUT_CSC_CONTROL, 0,
 				OUTPUT_CSC_GRPH_MODE, 0);
 			break;
-			break;
 		case COLOR_SPACE_SRGB_LIMITED:
 			/* TV RGB */
 			REG_SET(OUTPUT_CSC_CONTROL, 0,
 				OUTPUT_CSC_GRPH_MODE, 1);
 			break;
diff --git a/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c b/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
index d741787f75dc..42c7d157da32 100644
--- a/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
@@ -416,29 +416,22 @@ static int map_transmitter_id_to_phy_instance(
 	enum transmitter transmitter)
 {
 	switch (transmitter) {
 	case TRANSMITTER_UNIPHY_A:
 		return 0;
-	break;
 	case TRANSMITTER_UNIPHY_B:
 		return 1;
-	break;
 	case TRANSMITTER_UNIPHY_C:
 		return 2;
-	break;
 	case TRANSMITTER_UNIPHY_D:
 		return 3;
-	break;
 	case TRANSMITTER_UNIPHY_E:
 		return 4;
-	break;
 	case TRANSMITTER_UNIPHY_F:
 		return 5;
-	break;
 	case TRANSMITTER_UNIPHY_G:
 		return 6;
-	break;
 	default:
 		ASSERT(0);
 		return 0;
 	}
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
index 2bbfa2e176a9..382581c4a674 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
@@ -469,29 +469,22 @@ static int map_transmitter_id_to_phy_instance(
 	enum transmitter transmitter)
 {
 	switch (transmitter) {
 	case TRANSMITTER_UNIPHY_A:
 		return 0;
-	break;
 	case TRANSMITTER_UNIPHY_B:
 		return 1;
-	break;
 	case TRANSMITTER_UNIPHY_C:
 		return 2;
-	break;
 	case TRANSMITTER_UNIPHY_D:
 		return 3;
-	break;
 	case TRANSMITTER_UNIPHY_E:
 		return 4;
-	break;
 	case TRANSMITTER_UNIPHY_F:
 		return 5;
-	break;
 	case TRANSMITTER_UNIPHY_G:
 		return 6;
-	break;
 	default:
 		ASSERT(0);
 		return 0;
 	}
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c b/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
index b622b4b1dac3..7b4b2304bbff 100644
--- a/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
@@ -444,29 +444,22 @@ static int map_transmitter_id_to_phy_instance(
 	enum transmitter transmitter)
 {
 	switch (transmitter) {
 	case TRANSMITTER_UNIPHY_A:
 		return 0;
-	break;
 	case TRANSMITTER_UNIPHY_B:
 		return 1;
-	break;
 	case TRANSMITTER_UNIPHY_C:
 		return 2;
-	break;
 	case TRANSMITTER_UNIPHY_D:
 		return 3;
-	break;
 	case TRANSMITTER_UNIPHY_E:
 		return 4;
-	break;
 	case TRANSMITTER_UNIPHY_F:
 		return 5;
-	break;
 	case TRANSMITTER_UNIPHY_G:
 		return 6;
-	break;
 	default:
 		ASSERT(0);
 		return 0;
 	}
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
index 16fe7344702f..3d782b7c86cb 100644
--- a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
@@ -381,29 +381,22 @@ static int map_transmitter_id_to_phy_instance(
 	enum transmitter transmitter)
 {
 	switch (transmitter) {
 	case TRANSMITTER_UNIPHY_A:
 		return 0;
-	break;
 	case TRANSMITTER_UNIPHY_B:
 		return 1;
-	break;
 	case TRANSMITTER_UNIPHY_C:
 		return 2;
-	break;
 	case TRANSMITTER_UNIPHY_D:
 		return 3;
-	break;
 	case TRANSMITTER_UNIPHY_E:
 		return 4;
-	break;
 	case TRANSMITTER_UNIPHY_F:
 		return 5;
-	break;
 	case TRANSMITTER_UNIPHY_G:
 		return 6;
-	break;
 	default:
 		ASSERT(0);
 		return 0;
 	}
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c b/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c
index 5a5a9cb77acb..e9dd78c484d6 100644
--- a/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c
@@ -451,29 +451,22 @@ static int map_transmitter_id_to_phy_instance(
 	enum transmitter transmitter)
 {
 	switch (transmitter) {
 	case TRANSMITTER_UNIPHY_A:
 		return 0;
-	break;
 	case TRANSMITTER_UNIPHY_B:
 		return 1;
-	break;
 	case TRANSMITTER_UNIPHY_C:
 		return 2;
-	break;
 	case TRANSMITTER_UNIPHY_D:
 		return 3;
-	break;
 	case TRANSMITTER_UNIPHY_E:
 		return 4;
-	break;
 	case TRANSMITTER_UNIPHY_F:
 		return 5;
-	break;
 	case TRANSMITTER_UNIPHY_G:
 		return 6;
-	break;
 	default:
 		ASSERT(0);
 		return 0;
 	}
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c b/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
index 0eae8cd35f9a..9dbf658162cd 100644
--- a/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
@@ -456,29 +456,22 @@ static int map_transmitter_id_to_phy_instance(
 	enum transmitter transmitter)
 {
 	switch (transmitter) {
 	case TRANSMITTER_UNIPHY_A:
 		return 0;
-	break;
 	case TRANSMITTER_UNIPHY_B:
 		return 1;
-	break;
 	case TRANSMITTER_UNIPHY_C:
 		return 2;
-	break;
 	case TRANSMITTER_UNIPHY_D:
 		return 3;
-	break;
 	case TRANSMITTER_UNIPHY_E:
 		return 4;
-	break;
 	case TRANSMITTER_UNIPHY_F:
 		return 5;
-	break;
 	case TRANSMITTER_UNIPHY_G:
 		return 6;
-	break;
 	default:
 		ASSERT(0);
 		return 0;
 	}
 }
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 38672f9e5c4f..bbe4e60dfd08 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -792,25 +792,20 @@ static int mgag200_crtc_set_plls(struct mga_device *mdev, long clock)
 	case G200_AGP:
 		return mgag200_g200_set_plls(mdev, clock);
 	case G200_SE_A:
 	case G200_SE_B:
 		return mga_g200se_set_plls(mdev, clock);
-		break;
 	case G200_WB:
 	case G200_EW3:
 		return mga_g200wb_set_plls(mdev, clock);
-		break;
 	case G200_EV:
 		return mga_g200ev_set_plls(mdev, clock);
-		break;
 	case G200_EH:
 	case G200_EH3:
 		return mga_g200eh_set_plls(mdev, clock);
-		break;
 	case G200_ER:
 		return mga_g200er_set_plls(mdev, clock);
-		break;
 	}
 
 	misc = RREG8(MGA_MISC_IN);
 	misc &= ~MGAREG_MISC_CLK_SEL_MASK;
 	misc |= MGAREG_MISC_CLK_SEL_MGA_MSK;
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c
index 350f10a3de37..2ec84b8a3b3a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c
@@ -121,11 +121,10 @@ pll_map(struct nvkm_bios *bios)
 	case NV_10:
 	case NV_11:
 	case NV_20:
 	case NV_30:
 		return nv04_pll_mapping;
-		break;
 	case NV_40:
 		return nv40_pll_mapping;
 	case NV_50:
 		if (device->chipset == 0x50)
 			return nv50_pll_mapping;
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c
index efa50274df97..4884eb4a9221 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c
@@ -138,21 +138,18 @@ mcp77_clk_read(struct nvkm_clk *base, enum nv_clk_src src)
 		case 0x00000030: return read_pll(clk, 0x004020) >> P;
 		}
 		break;
 	case nv_clk_src_mem:
 		return 0;
-		break;
 	case nv_clk_src_vdec:
 		P = (read_div(clk) & 0x00000700) >> 8;
 
 		switch (mast & 0x00400000) {
 		case 0x00400000:
 			return nvkm_clk_read(&clk->base, nv_clk_src_core) >> P;
-			break;
 		default:
 			return 500000 >> P;
-			break;
 		}
 		break;
 	default:
 		break;
 	}
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c
index 2ccb4b6be153..7b1eb44ff3da 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c
@@ -169,11 +169,10 @@ nv50_ram_timing_read(struct nv50_ram *ram, u32 *timing)
 	case NVKM_RAM_TYPE_GDDR3:
 		T(CWL) = ((timing[2] & 0xff000000) >> 24) + 1;
 		break;
 	default:
 		return -ENOSYS;
-		break;
 	}
 
 	T(WR) = ((timing[1] >> 24) & 0xff) - 1 - T(CWL);
 
 	return 0;
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c b/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c
index e01746ce9fc4..1156634533f9 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c
@@ -88,11 +88,10 @@ gk104_top_oneinit(struct nvkm_top *top)
 		case 0x0000000e: B_(NVENC ); break;
 		case 0x0000000f: A_(NVENC1); break;
 		case 0x00000010: B_(NVDEC ); break;
 		case 0x00000013: B_(CE    ); break;
 		case 0x00000014: C_(GSP   ); break;
-			break;
 		default:
 			break;
 		}
 
 		nvkm_debug(subdev, "%02x.%d (%8s): addr %06x fault %2d "
diff --git a/drivers/gpu/drm/qxl/qxl_ioctl.c b/drivers/gpu/drm/qxl/qxl_ioctl.c
index 5cea6eea72ab..2072ddc9549c 100644
--- a/drivers/gpu/drm/qxl/qxl_ioctl.c
+++ b/drivers/gpu/drm/qxl/qxl_ioctl.c
@@ -158,11 +158,10 @@ static int qxl_process_single_command(struct qxl_device *qdev,
 	case QXL_CMD_SURFACE:
 	case QXL_CMD_CURSOR:
 	default:
 		DRM_DEBUG("Only draw commands in execbuffers\n");
 		return -EINVAL;
-		break;
 	}
 
 	if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
 		return -EINVAL;
 
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index e03988698755..66dc452d643a 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -591,17 +591,15 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
 		return meson_sar_adc_get_sample(indio_dev, chan, NO_AVERAGING,
 						ONE_SAMPLE, val);
-		break;
 
 	case IIO_CHAN_INFO_AVERAGE_RAW:
 		return meson_sar_adc_get_sample(indio_dev, chan,
 						MEAN_AVERAGING, EIGHT_SAMPLES,
 						val);
-		break;
 
 	case IIO_CHAN_INFO_SCALE:
 		if (chan->type == IIO_VOLTAGE) {
 			ret = regulator_get_voltage(priv->vref);
 			if (ret < 0) {
diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c
index 222ebb26f013..431076dc0d2c 100644
--- a/drivers/iio/imu/bmi160/bmi160_core.c
+++ b/drivers/iio/imu/bmi160/bmi160_core.c
@@ -484,11 +484,10 @@ static int bmi160_write_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_SCALE:
 		return bmi160_set_scale(data,
 					bmi160_to_sensor(chan->type), val2);
-		break;
 	case IIO_CHAN_INFO_SAMP_FREQ:
 		return bmi160_set_odr(data, bmi160_to_sensor(chan->type),
 				      val, val2);
 	default:
 		return -EINVAL;
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index d480a514c983..3940714e4397 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -542,11 +542,10 @@ static void ipoctal_set_termios(struct tty_struct *tty,
 		mr1 |= MR1_RxRTS_CONTROL_OFF;
 		mr2 |= MR2_TxRTS_CONTROL_ON | MR2_CTS_ENABLE_TX_OFF;
 		break;
 	default:
 		return;
-		break;
 	}
 
 	baud = tty_get_baud_rate(tty);
 	tty_termios_encode_baud_rate(&tty->termios, baud, baud);
 
diff --git a/drivers/media/dvb-frontends/drx39xyj/drxj.c b/drivers/media/dvb-frontends/drx39xyj/drxj.c
index 237b9d04c076..37b32d9b398d 100644
--- a/drivers/media/dvb-frontends/drx39xyj/drxj.c
+++ b/drivers/media/dvb-frontends/drx39xyj/drxj.c
@@ -2323,11 +2323,10 @@ hi_command(struct i2c_device_addr *dev_addr, const struct drxj_hi_cmd *cmd, u16
 		/* No parameters */
 		break;
 
 	default:
 		return -EINVAL;
-		break;
 	}
 
 	/* Write command */
 	rc = drxj_dap_write_reg16(dev_addr, SIO_HI_RA_RAM_CMD__A, cmd->cmd, 0);
 	if (rc != 0) {
@@ -3592,11 +3591,10 @@ static int ctrl_set_uio_cfg(struct drx_demod_instance *demod, struct drxuio_cfg
 				goto rw_error;
 			}
 			break;
 		default:
 			return -EINVAL;
-			break;
 		}		/* switch ( uio_cfg->mode ) */
 		break;
       /*====================================================================*/
 	case DRX_UIO3:
 		/* DRX_UIO3: GPIO UIO-3 */
@@ -3616,11 +3614,10 @@ static int ctrl_set_uio_cfg(struct drx_demod_instance *demod, struct drxuio_cfg
 				goto rw_error;
 			}
 			break;
 		default:
 			return -EINVAL;
-			break;
 		}		/* switch ( uio_cfg->mode ) */
 		break;
       /*====================================================================*/
 	case DRX_UIO4:
 		/* DRX_UIO4: IRQN UIO-4 */
@@ -3640,11 +3637,10 @@ static int ctrl_set_uio_cfg(struct drx_demod_instance *demod, struct drxuio_cfg
 			ext_attr->uio_irqn_mode = uio_cfg->mode;
 			break;
 		case DRX_UIO_MODE_FIRMWARE0:
 		default:
 			return -EINVAL;
-			break;
 		}		/* switch ( uio_cfg->mode ) */
 		break;
       /*====================================================================*/
 	default:
 		return -EINVAL;
@@ -10951,11 +10947,10 @@ ctrl_set_standard(struct drx_demod_instance *demod, enum drx_standard *standard)
 		}
 		break;
 	default:
 		ext_attr->standard = DRX_STANDARD_UNKNOWN;
 		return -EINVAL;
-		break;
 	}
 
 	return 0;
 rw_error:
 	/* Don't know what the standard is now ... try again */
@@ -11072,11 +11067,10 @@ ctrl_power_mode(struct drx_demod_instance *demod, enum drx_power_mode *mode)
 		sio_cc_pwd_mode = SIO_CC_PWD_MODE_LEVEL_OSC;
 		break;
 	default:
 		/* Unknow sleep mode */
 		return -EINVAL;
-		break;
 	}
 
 	/* Check if device needs to be powered up */
 	if ((common_attr->current_power_mode != DRX_POWER_UP)) {
 		rc = power_up_device(demod);
@@ -11894,11 +11888,10 @@ static int drx_ctrl_u_code(struct drx_demod_instance *demod,
 			}
 			break;
 		}
 		default:
 			return -EINVAL;
-			break;
 
 		}
 		mc_data += mc_block_nr_bytes;
 	}
 
diff --git a/drivers/media/dvb-frontends/drxd_hard.c b/drivers/media/dvb-frontends/drxd_hard.c
index 45f982863904..a7eb81df88c2 100644
--- a/drivers/media/dvb-frontends/drxd_hard.c
+++ b/drivers/media/dvb-frontends/drxd_hard.c
@@ -1620,11 +1620,10 @@ static int CorrectSysClockDeviation(struct drxd_state *state)
 		case 6000000:
 			bandwidth = DRXD_BANDWIDTH_6MHZ_IN_HZ;
 			break;
 		default:
 			return -1;
-			break;
 		}
 
 		/* Compute new sysclock value
 		   sysClockFreq = (((incr + 2^23)*bandwidth)/2^21)/1000 */
 		incr += (1 << 23);
diff --git a/drivers/media/dvb-frontends/nxt200x.c b/drivers/media/dvb-frontends/nxt200x.c
index 35b83b1dd82c..200b6dbc75f8 100644
--- a/drivers/media/dvb-frontends/nxt200x.c
+++ b/drivers/media/dvb-frontends/nxt200x.c
@@ -166,11 +166,10 @@ static int nxt200x_writereg_multibyte (struct nxt200x_state* state, u8 reg, u8*
 			len2 = ((attr << 4) | 0x10) | len;
 			buf = 0x80;
 			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 
 	/* set multi register length */
 	nxt200x_writebytes(state, 0x34, &len2, 1);
 
@@ -188,11 +187,10 @@ static int nxt200x_writereg_multibyte (struct nxt200x_state* state, u8 reg, u8*
 			if (buf == 0)
 				return 0;
 			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 
 	pr_warn("Error writing multireg register 0x%02X\n", reg);
 
 	return 0;
@@ -214,11 +212,10 @@ static int nxt200x_readreg_multibyte (struct nxt200x_state* state, u8 reg, u8* d
 			nxt200x_writebytes(state, 0x34, &len2, 1);
 
 			/* read the actual data */
 			nxt200x_readbytes(state, reg, data, len);
 			return 0;
-			break;
 		case NXT2004:
 			/* probably not right, but gives correct values */
 			attr = 0x02;
 			if (reg & 0x80) {
 				attr = attr << 1;
@@ -237,14 +234,12 @@ static int nxt200x_readreg_multibyte (struct nxt200x_state* state, u8 reg, u8* d
 			/* read the actual data */
 			for(i = 0; i < len; i++) {
 				nxt200x_readbytes(state, 0x36 + i, &data[i], 1);
 			}
 			return 0;
-			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 }
 
 static void nxt200x_microcontroller_stop (struct nxt200x_state* state)
 {
@@ -372,11 +367,10 @@ static int nxt200x_writetuner (struct nxt200x_state* state, u8* data)
 			}
 			pr_warn("timeout error writing to tuner\n");
 			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 	return 0;
 }
 
 static void nxt200x_agc_reset(struct nxt200x_state* state)
@@ -553,11 +547,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
 			if (state->config->set_ts_params)
 				state->config->set_ts_params(fe, 0);
 			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 
 	if (fe->ops.tuner_ops.calc_regs) {
 		/* get tuning information */
 		fe->ops.tuner_ops.calc_regs(fe, buf, 5);
@@ -578,11 +571,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
 		case VSB_8:
 			buf[0] = 0x70;
 			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 	nxt200x_writebytes(state, 0x42, buf, 1);
 
 	/* configure sdm */
 	switch (state->demod_chip) {
@@ -592,11 +584,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
 		case NXT2004:
 			buf[0] = 0x07;
 			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 	nxt200x_writebytes(state, 0x57, buf, 1);
 
 	/* write sdm1 input */
 	buf[0] = 0x10;
@@ -608,11 +599,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
 		case NXT2004:
 			nxt200x_writebytes(state, 0x58, buf, 2);
 			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 
 	/* write sdmx input */
 	switch (p->modulation) {
 		case QAM_64:
@@ -624,11 +614,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
 		case VSB_8:
 				buf[0] = 0x60;
 				break;
 		default:
 				return -EINVAL;
-				break;
 	}
 	buf[1] = 0x00;
 	switch (state->demod_chip) {
 		case NXT2002:
 			nxt200x_writereg_multibyte(state, 0x5C, buf, 2);
@@ -636,11 +625,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
 		case NXT2004:
 			nxt200x_writebytes(state, 0x5C, buf, 2);
 			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 
 	/* write adc power lpf fc */
 	buf[0] = 0x05;
 	nxt200x_writebytes(state, 0x43, buf, 1);
@@ -662,11 +650,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
 		case NXT2004:
 			nxt200x_writebytes(state, 0x4B, buf, 2);
 			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 
 	/* write kg1 */
 	buf[0] = 0x00;
 	nxt200x_writebytes(state, 0x4D, buf, 1);
@@ -718,11 +705,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
 		case VSB_8:
 				buf[0] = 0x00;
 				break;
 		default:
 				return -EINVAL;
-				break;
 	}
 	nxt200x_writebytes(state, 0x30, buf, 1);
 
 	/* write agc control reg */
 	buf[0] = 0x00;
@@ -740,11 +726,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
 			nxt200x_writebytes(state, 0x49, buf, 2);
 			nxt200x_writebytes(state, 0x4B, buf, 2);
 			break;
 		default:
 			return -EINVAL;
-			break;
 	}
 
 	/* write agc control reg */
 	buf[0] = 0x04;
 	nxt200x_writebytes(state, 0x41, buf, 1);
@@ -1112,11 +1097,10 @@ static int nxt200x_init(struct dvb_frontend* fe)
 			case NXT2004:
 				ret = nxt2004_init(fe);
 				break;
 			default:
 				return -EINVAL;
-				break;
 		}
 		state->initialised = 1;
 	}
 	return ret;
 }
diff --git a/drivers/media/dvb-frontends/si21xx.c b/drivers/media/dvb-frontends/si21xx.c
index a116eff417f2..e31eb2c5cc4c 100644
--- a/drivers/media/dvb-frontends/si21xx.c
+++ b/drivers/media/dvb-frontends/si21xx.c
@@ -462,14 +462,12 @@ static int si21xx_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage volt)
 	val = (0x80 | si21_readreg(state, LNB_CTRL_REG_1));
 
 	switch (volt) {
 	case SEC_VOLTAGE_18:
 		return si21_writereg(state, LNB_CTRL_REG_1, val | 0x40);
-		break;
 	case SEC_VOLTAGE_13:
 		return si21_writereg(state, LNB_CTRL_REG_1, (val & ~0x40));
-		break;
 	default:
 		return -EINVAL;
 	}
 }
 
diff --git a/drivers/media/tuners/mt2063.c b/drivers/media/tuners/mt2063.c
index 2240d214dfac..d105431a2e2d 100644
--- a/drivers/media/tuners/mt2063.c
+++ b/drivers/media/tuners/mt2063.c
@@ -1847,11 +1847,10 @@ static int mt2063_init(struct dvb_frontend *fe)
 		def = MT2063B0_defaults;
 		break;
 
 	default:
 		return -ENODEV;
-		break;
 	}
 
 	while (status >= 0 && *def) {
 		u8 reg = *def++;
 		u8 val = *def++;
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 9903e9660a38..3078fac34e51 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -471,11 +471,10 @@ mpt_turbo_reply(MPT_ADAPTER *ioc, u32 pa)
 			req_idx = pa & 0x0000FFFF;
 			mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
 			mpt_free_msg_frame(ioc, mf);
 			mb();
 			return;
-			break;
 		}
 		mr = (MPT_FRAME_HDR *) CAST_U32_TO_PTR(pa);
 		break;
 	case MPI_CONTEXT_REPLY_TYPE_SCSI_TARGET:
 		cb_idx = mpt_get_cb_idx(MPTSTM_DRIVER);
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index a97eb5d47705..686e8b6a4c55 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -1375,11 +1375,10 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
 
 		dev->dev_state = MEI_DEV_POWER_DOWN;
 		dev_info(dev->dev, "hbm: stop response: resetting.\n");
 		/* force the reset */
 		return -EPROTO;
-		break;
 
 	case CLIENT_DISCONNECT_REQ_CMD:
 		dev_dbg(dev->dev, "hbm: disconnect request: message received\n");
 
 		disconnect_req = (struct hbm_client_connect_request *)mei_msg;
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index b40f46a43fc6..323035d4f2d0 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -879,21 +879,19 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
 		loff_t offs;
 
 		if (copy_from_user(&offs, argp, sizeof(loff_t)))
 			return -EFAULT;
 		return mtd_block_isbad(mtd, offs);
-		break;
 	}
 
 	case MEMSETBADBLOCK:
 	{
 		loff_t offs;
 
 		if (copy_from_user(&offs, argp, sizeof(loff_t)))
 			return -EFAULT;
 		return mtd_block_markbad(mtd, offs);
-		break;
 	}
 
 	case OTPSELECT:
 	{
 		int mode;
diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
index c3f49543ff26..9c215f7c5f81 100644
--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
@@ -73,15 +73,15 @@ static const struct can_bittiming_const mcp251xfd_data_bittiming_const = {
 
 static const char *__mcp251xfd_get_model_str(enum mcp251xfd_model model)
 {
 	switch (model) {
 	case MCP251XFD_MODEL_MCP2517FD:
-		return "MCP2517FD"; break;
+		return "MCP2517FD";
 	case MCP251XFD_MODEL_MCP2518FD:
-		return "MCP2518FD"; break;
+		return "MCP2518FD";
 	case MCP251XFD_MODEL_MCP251XFD:
-		return "MCP251xFD"; break;
+		return "MCP251xFD";
 	}
 
 	return "<unknown>";
 }
 
@@ -93,25 +93,25 @@ mcp251xfd_get_model_str(const struct mcp251xfd_priv *priv)
 
 static const char *mcp251xfd_get_mode_str(const u8 mode)
 {
 	switch (mode) {
 	case MCP251XFD_REG_CON_MODE_MIXED:
-		return "Mixed (CAN FD/CAN 2.0)"; break;
+		return "Mixed (CAN FD/CAN 2.0)";
 	case MCP251XFD_REG_CON_MODE_SLEEP:
-		return "Sleep"; break;
+		return "Sleep";
 	case MCP251XFD_REG_CON_MODE_INT_LOOPBACK:
-		return "Internal Loopback"; break;
+		return "Internal Loopback";
 	case MCP251XFD_REG_CON_MODE_LISTENONLY:
-		return "Listen Only"; break;
+		return "Listen Only";
 	case MCP251XFD_REG_CON_MODE_CONFIG:
-		return "Configuration"; break;
+		return "Configuration";
 	case MCP251XFD_REG_CON_MODE_EXT_LOOPBACK:
-		return "External Loopback"; break;
+		return "External Loopback";
 	case MCP251XFD_REG_CON_MODE_CAN2_0:
-		return "CAN 2.0"; break;
+		return "CAN 2.0";
 	case MCP251XFD_REG_CON_MODE_RESTRICTED:
-		return "Restricted Operation"; break;
+		return "Restricted Operation";
 	}
 
 	return "<unknown>";
 }
 
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index 0f865daeb36d..bf5e0e9bd0e2 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -1161,11 +1161,10 @@ int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 			break;
 
 		default:
 			err = -1;
 			goto err_exit;
-		break;
 		}
 		if (!(self->aq_nic_cfg.aq_hw_caps->link_speed_msk & rate)) {
 			err = -1;
 			goto err_exit;
 		}
diff --git a/drivers/net/ethernet/cisco/enic/enic_ethtool.c b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
index a4dd52bba2c3..1a9803f2073e 100644
--- a/drivers/net/ethernet/cisco/enic/enic_ethtool.c
+++ b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
@@ -432,11 +432,10 @@ static int enic_grxclsrule(struct enic *enic, struct ethtool_rxnfc *cmd)
 	case IPPROTO_UDP:
 		fsp->flow_type = UDP_V4_FLOW;
 		break;
 	default:
 		return -EINVAL;
-		break;
 	}
 
 	fsp->h_u.tcp_ip4_spec.ip4src = flow_get_u32_src(&n->keys);
 	fsp->m_u.tcp_ip4_spec.ip4src = (__u32)~0;
 
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c
index de563cfd294d..4b93ba149ec5 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c
@@ -348,11 +348,10 @@ static s32 ixgbe_calc_eeprom_checksum_X540(struct ixgbe_hw *hw)
 			continue;
 
 		if (ixgbe_read_eerd_generic(hw, pointer, &length)) {
 			hw_dbg(hw, "EEPROM read failed\n");
 			return IXGBE_ERR_EEPROM;
-			break;
 		}
 
 		/* Skip pointer section if length is invalid. */
 		if (length == 0xFFFF || length == 0 ||
 		    (pointer + length) >= hw->eeprom.word_size)
diff --git a/drivers/net/wan/lmc/lmc_proto.c b/drivers/net/wan/lmc/lmc_proto.c
index e8b0b902b424..4e9cc83b615a 100644
--- a/drivers/net/wan/lmc/lmc_proto.c
+++ b/drivers/net/wan/lmc/lmc_proto.c
@@ -87,21 +87,17 @@ void lmc_proto_close(lmc_softc_t *sc)
 __be16 lmc_proto_type(lmc_softc_t *sc, struct sk_buff *skb) /*FOLD00*/
 {
     switch(sc->if_type){
     case LMC_PPP:
 	    return hdlc_type_trans(skb, sc->lmc_device);
-	    break;
     case LMC_NET:
         return htons(ETH_P_802_2);
-        break;
     case LMC_RAW: /* Packet type for skbuff kind of useless */
         return htons(ETH_P_802_2);
-        break;
     default:
         printk(KERN_WARNING "%s: No protocol set for this interface, assuming 802.2 (which is wrong!!)\n", sc->name);
         return htons(ETH_P_802_2);
-        break;
     }
 }
 
 void lmc_proto_netif(lmc_softc_t *sc, struct sk_buff *skb) /*FOLD00*/
 {
diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 5c1af2021883..9c4e6cf2137a 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -3876,11 +3876,10 @@ bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
 		atomic_inc(&htt->num_mpdus_ready);
 
 		return ath10k_htt_rx_proc_rx_frag_ind(htt,
 						      &resp->rx_frag_ind,
 						      skb);
-		break;
 	}
 	case HTT_T2H_MSG_TYPE_TEST:
 		break;
 	case HTT_T2H_MSG_TYPE_STATS_CONF:
 		trace_ath10k_htt_stats(ar, skb->data, skb->len);
diff --git a/drivers/net/wireless/ath/ath6kl/testmode.c b/drivers/net/wireless/ath/ath6kl/testmode.c
index f3906dbe5495..89c7c4e25169 100644
--- a/drivers/net/wireless/ath/ath6kl/testmode.c
+++ b/drivers/net/wireless/ath/ath6kl/testmode.c
@@ -92,11 +92,10 @@ int ath6kl_tm_cmd(struct wiphy *wiphy, struct wireless_dev *wdev,
 
 		ath6kl_wmi_test_cmd(ar->wmi, buf, buf_len);
 
 		return 0;
 
-		break;
 	case ATH6KL_TM_CMD_RX_REPORT:
 	default:
 		return -EOPNOTSUPP;
 	}
 }
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 6609ce122e6e..b66eeb577272 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2306,11 +2306,10 @@ void ath9k_hw_beaconinit(struct ath_hw *ah, u32 next_beacon, u32 beacon_period)
 		break;
 	default:
 		ath_dbg(ath9k_hw_common(ah), BEACON,
 			"%s: unsupported opmode: %d\n", __func__, ah->opmode);
 		return;
-		break;
 	}
 
 	REG_WRITE(ah, AR_BEACON_PERIOD, beacon_period);
 	REG_WRITE(ah, AR_DMA_BEACON_PERIOD, beacon_period);
 	REG_WRITE(ah, AR_SWBA_PERIOD, beacon_period);
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
index cbdebefb854a..8698ca4d30de 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
@@ -1200,17 +1200,15 @@ static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 	switch (vif->type) {
 	case NL80211_IFTYPE_STATION:
 		return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
 						force_assoc_off,
 						bssid_override);
-		break;
 	case NL80211_IFTYPE_AP:
 		if (!vif->p2p)
 			return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
 		else
 			return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
-		break;
 	case NL80211_IFTYPE_MONITOR:
 		return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
 	case NL80211_IFTYPE_P2P_DEVICE:
 		return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
 	case NL80211_IFTYPE_ADHOC:
diff --git a/drivers/net/wireless/intersil/p54/eeprom.c b/drivers/net/wireless/intersil/p54/eeprom.c
index 5bd35c147e19..3ca9d26df174 100644
--- a/drivers/net/wireless/intersil/p54/eeprom.c
+++ b/drivers/net/wireless/intersil/p54/eeprom.c
@@ -868,11 +868,10 @@ int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 				err = -ENOMSG;
 				goto err;
 			} else {
 				goto good_eeprom;
 			}
-			break;
 		default:
 			break;
 		}
 
 		crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
diff --git a/drivers/net/wireless/intersil/prism54/oid_mgt.c b/drivers/net/wireless/intersil/prism54/oid_mgt.c
index 9fd307ca4b6d..7b251ae90a68 100644
--- a/drivers/net/wireless/intersil/prism54/oid_mgt.c
+++ b/drivers/net/wireless/intersil/prism54/oid_mgt.c
@@ -785,21 +785,19 @@ mgt_response_to_str(enum oid_num_t n, union oid_res_t *r, char *str)
 			struct obj_buffer *buff = r->ptr;
 			return scnprintf(str, PRIV_STR_SIZE,
 					"size=%u\naddr=0x%X\n", buff->size,
 					buff->addr);
 		}
-		break;
 	case OID_TYPE_BSS:{
 			struct obj_bss *bss = r->ptr;
 			return scnprintf(str, PRIV_STR_SIZE,
 					"age=%u\nchannel=%u\n"
 					"capinfo=0x%X\nrates=0x%X\n"
 					"basic_rates=0x%X\n", bss->age,
 					bss->channel, bss->capinfo,
 					bss->rates, bss->basic_rates);
 		}
-		break;
 	case OID_TYPE_BSSLIST:{
 			struct obj_bsslist *list = r->ptr;
 			int i, k;
 			k = scnprintf(str, PRIV_STR_SIZE, "nr=%u\n", list->nr);
 			for (i = 0; i < list->nr; i++)
@@ -812,53 +810,47 @@ mgt_response_to_str(enum oid_num_t n, union oid_res_t *r, char *str)
 					      list->bsslist[i].capinfo,
 					      list->bsslist[i].rates,
 					      list->bsslist[i].basic_rates);
 			return k;
 		}
-		break;
 	case OID_TYPE_FREQUENCIES:{
 			struct obj_frequencies *freq = r->ptr;
 			int i, t;
 			printk("nr : %u\n", freq->nr);
 			t = scnprintf(str, PRIV_STR_SIZE, "nr=%u\n", freq->nr);
 			for (i = 0; i < freq->nr; i++)
 				t += scnprintf(str + t, PRIV_STR_SIZE - t,
 					      "mhz[%u]=%u\n", i, freq->mhz[i]);
 			return t;
 		}
-		break;
 	case OID_TYPE_MLME:{
 			struct obj_mlme *mlme = r->ptr;
 			return scnprintf(str, PRIV_STR_SIZE,
 					"id=0x%X\nstate=0x%X\ncode=0x%X\n",
 					mlme->id, mlme->state, mlme->code);
 		}
-		break;
 	case OID_TYPE_MLMEEX:{
 			struct obj_mlmeex *mlme = r->ptr;
 			return scnprintf(str, PRIV_STR_SIZE,
 					"id=0x%X\nstate=0x%X\n"
 					"code=0x%X\nsize=0x%X\n", mlme->id,
 					mlme->state, mlme->code, mlme->size);
 		}
-		break;
 	case OID_TYPE_ATTACH:{
 			struct obj_attachment *attach = r->ptr;
 			return scnprintf(str, PRIV_STR_SIZE,
 					"id=%d\nsize=%d\n",
 					attach->id,
 					attach->size);
 		}
-		break;
 	case OID_TYPE_SSID:{
 			struct obj_ssid *ssid = r->ptr;
 			return scnprintf(str, PRIV_STR_SIZE,
 					"length=%u\noctets=%.*s\n",
 					ssid->length, ssid->length,
 					ssid->octets);
 		}
-		break;
 	case OID_TYPE_KEY:{
 			struct obj_key *key = r->ptr;
 			int t, i;
 			t = scnprintf(str, PRIV_STR_SIZE,
 				     "type=0x%X\nlength=0x%X\nkey=0x",
@@ -867,11 +859,10 @@ mgt_response_to_str(enum oid_num_t n, union oid_res_t *r, char *str)
 				t += scnprintf(str + t, PRIV_STR_SIZE - t,
 					      "%02X:", key->key[i]);
 			t += scnprintf(str + t, PRIV_STR_SIZE - t, "\n");
 			return t;
 		}
-		break;
 	case OID_TYPE_RAW:
 	case OID_TYPE_ADDR:{
 			unsigned char *buff = r->ptr;
 			int t, i;
 			t = scnprintf(str, PRIV_STR_SIZE, "hex data=");
@@ -879,11 +870,10 @@ mgt_response_to_str(enum oid_num_t n, union oid_res_t *r, char *str)
 				t += scnprintf(str + t, PRIV_STR_SIZE - t,
 					      "%02X:", buff[i]);
 			t += scnprintf(str + t, PRIV_STR_SIZE - t, "\n");
 			return t;
 		}
-		break;
 	default:
 		BUG();
 	}
 	return 0;
 }
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/hw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/hw.c
index 63f9ea21962f..bd9160b166c5 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/hw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/hw.c
@@ -1224,11 +1224,10 @@ static int _rtl88ee_set_media_status(struct ieee80211_hw *hw,
 			"Set Network type to AP!\n");
 		break;
 	default:
 		pr_err("Network type %d not support!\n", type);
 		return 1;
-		break;
 	}
 
 	/* MSR_INFRA == Link in infrastructure network;
 	 * MSR_ADHOC == Link in ad hoc network;
 	 * Therefore, check link state is necessary.
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/hw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/hw.c
index a36dc6e726d2..f8a1de6e9849 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/hw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/hw.c
@@ -1130,11 +1130,10 @@ static int _rtl8723e_set_media_status(struct ieee80211_hw *hw,
 			"Set Network type to AP!\n");
 		break;
 	default:
 		pr_err("Network type %d not support!\n", type);
 		return 1;
-		break;
 	}
 
 	/* MSR_INFRA == Link in infrastructure network;
 	 * MSR_ADHOC == Link in ad hoc network;
 	 * Therefore, check link state is necessary.
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c
index f41a7643b9c4..225b8cd44f23 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c
@@ -2083,16 +2083,14 @@ bool rtl8812ae_phy_config_rf_with_headerfile(struct ieee80211_hw *hw,
 	switch (rfpath) {
 	case RF90_PATH_A:
 		return __rtl8821ae_phy_config_with_headerfile(hw,
 				radioa_array_table_a, radioa_arraylen_a,
 				_rtl8821ae_config_rf_radio_a);
-		break;
 	case RF90_PATH_B:
 		return __rtl8821ae_phy_config_with_headerfile(hw,
 				radioa_array_table_b, radioa_arraylen_b,
 				_rtl8821ae_config_rf_radio_b);
-		break;
 	case RF90_PATH_C:
 	case RF90_PATH_D:
 		pr_err("switch case %#x not processed\n", rfpath);
 		break;
 	}
@@ -2114,11 +2112,10 @@ bool rtl8821ae_phy_config_rf_with_headerfile(struct ieee80211_hw *hw,
 	switch (rfpath) {
 	case RF90_PATH_A:
 		return __rtl8821ae_phy_config_with_headerfile(hw,
 			radioa_array_table, radioa_arraylen,
 			_rtl8821ae_config_rf_radio_a);
-		break;
 
 	case RF90_PATH_B:
 	case RF90_PATH_C:
 	case RF90_PATH_D:
 		pr_err("switch case %#x not processed\n", rfpath);
diff --git a/drivers/nfc/st21nfca/core.c b/drivers/nfc/st21nfca/core.c
index 2ce17932a073..6ca0d2f56b18 100644
--- a/drivers/nfc/st21nfca/core.c
+++ b/drivers/nfc/st21nfca/core.c
@@ -792,11 +792,10 @@ static int st21nfca_hci_im_transceive(struct nfc_hci_dev *hdev,
 		return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
 					      ST21NFCA_WR_XCHG_DATA, skb->data,
 					      skb->len,
 					      st21nfca_hci_data_exchange_cb,
 					      info);
-		break;
 	default:
 		return 1;
 	}
 }
 
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index 3bd97c73f983..c70f62fe321e 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -1380,11 +1380,10 @@ static int trf7970a_is_iso15693_write_or_lock(u8 cmd)
 	case ISO15693_CMD_WRITE_AFI:
 	case ISO15693_CMD_LOCK_AFI:
 	case ISO15693_CMD_WRITE_DSFID:
 	case ISO15693_CMD_LOCK_DSFID:
 		return 1;
-		break;
 	default:
 		return 0;
 	}
 }
 
diff --git a/drivers/nvdimm/claim.c b/drivers/nvdimm/claim.c
index 5a7c80053c62..2f250874b1a4 100644
--- a/drivers/nvdimm/claim.c
+++ b/drivers/nvdimm/claim.c
@@ -200,11 +200,10 @@ ssize_t nd_namespace_store(struct device *dev,
 		}
 		break;
 	default:
 		len = -EBUSY;
 		goto out_attach;
-		break;
 	}
 
 	if (__nvdimm_namespace_capacity(ndns) < SZ_16M) {
 		dev_dbg(dev, "%s too small to host\n", name);
 		len = -ENXIO;
diff --git a/drivers/pci/controller/pci-v3-semi.c b/drivers/pci/controller/pci-v3-semi.c
index 1f54334f09f7..154a5398633c 100644
--- a/drivers/pci/controller/pci-v3-semi.c
+++ b/drivers/pci/controller/pci-v3-semi.c
@@ -656,11 +656,10 @@ static int v3_get_dma_range_config(struct v3_pci *v3,
 		val |= V3_LB_BASE_ADR_SIZE_2GB;
 		break;
 	default:
 		dev_err(v3->dev, "illegal dma memory chunk size\n");
 		return -EINVAL;
-		break;
 	}
 	val |= V3_PCI_MAP_M_REG_EN | V3_PCI_MAP_M_ENABLE;
 	*pci_map = val;
 
 	dev_dbg(dev,
diff --git a/drivers/pinctrl/samsung/pinctrl-s3c24xx.c b/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
index 5e24838a582f..2223ead5bd72 100644
--- a/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
+++ b/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
@@ -106,23 +106,18 @@ struct s3c24xx_eint_domain_data {
 static int s3c24xx_eint_get_trigger(unsigned int type)
 {
 	switch (type) {
 	case IRQ_TYPE_EDGE_RISING:
 		return EINT_EDGE_RISING;
-		break;
 	case IRQ_TYPE_EDGE_FALLING:
 		return EINT_EDGE_FALLING;
-		break;
 	case IRQ_TYPE_EDGE_BOTH:
 		return EINT_EDGE_BOTH;
-		break;
 	case IRQ_TYPE_LEVEL_HIGH:
 		return EINT_LEVEL_HIGH;
-		break;
 	case IRQ_TYPE_LEVEL_LOW:
 		return EINT_LEVEL_LOW;
-		break;
 	default:
 		return -EINVAL;
 	}
 }
 
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index 49f4b73be513..1c2084c74a57 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -790,11 +790,10 @@ static acpi_status AMW0_set_u32(u32 value, u32 cap)
 		if (value > max_brightness)
 			return AE_BAD_PARAMETER;
 		switch (quirks->brightness) {
 		default:
 			return ec_write(0x83, value);
-			break;
 		}
 	default:
 		return AE_ERROR;
 	}
 
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index e5a1b5533408..704813374922 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -2465,26 +2465,23 @@ static int __sony_nc_gfx_switch_status_get(void)
 	case 0x0146:
 		/* 1: discrete GFX (speed)
 		 * 0: integrated GFX (stamina)
 		 */
 		return result & 0x1 ? SPEED : STAMINA;
-		break;
 	case 0x015B:
 		/* 0: discrete GFX (speed)
 		 * 1: integrated GFX (stamina)
 		 */
 		return result & 0x1 ? STAMINA : SPEED;
-		break;
 	case 0x0128:
 		/* it's a more elaborated bitmask, for now:
 		 * 2: integrated GFX (stamina)
 		 * 0: discrete GFX (speed)
 		 */
 		dprintk("GFX Status: 0x%x\n", result);
 		return result & 0x80 ? AUTO :
 			result & 0x02 ? STAMINA : SPEED;
-		break;
 	}
 	return -EINVAL;
 }
 
 static ssize_t sony_nc_gfx_switch_status_show(struct device *dev,
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index d88f388a3450..44e802f9f1b4 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -1258,17 +1258,14 @@ acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
 	}
 
 	switch (result) {
 	case -EINVAL:
 		return AE_BAD_PARAMETER;
-		break;
 	case -ENODEV:
 		return AE_NOT_FOUND;
-		break;
 	case -ETIME:
 		return AE_TIME;
-		break;
 	default:
 		return AE_OK;
 	}
 }
 
diff --git a/drivers/power/supply/wm831x_power.c b/drivers/power/supply/wm831x_power.c
index 18b33f14dfee..4cd2dd870039 100644
--- a/drivers/power/supply/wm831x_power.c
+++ b/drivers/power/supply/wm831x_power.c
@@ -666,11 +666,10 @@ static int wm831x_power_probe(struct platform_device *pdev)
 	default:
 		dev_err(&pdev->dev, "Failed to find USB phy: %d\n", ret);
 		fallthrough;
 	case -EPROBE_DEFER:
 		goto err_bat_irq;
-		break;
 	}
 
 	return ret;
 
 err_bat_irq:
diff --git a/drivers/scsi/aic94xx/aic94xx_task.c b/drivers/scsi/aic94xx/aic94xx_task.c
index f923ed019d4a..ed034192b3c3 100644
--- a/drivers/scsi/aic94xx/aic94xx_task.c
+++ b/drivers/scsi/aic94xx/aic94xx_task.c
@@ -267,11 +267,10 @@ static void asd_task_tasklet_complete(struct asd_ascb *ascb,
 		ts->stat = SAS_NAK_R_ERR;
 		break;
 	case TA_I_T_NEXUS_LOSS:
 		opcode = dl->status_block[0];
 		goto Again;
-		break;
 	case TF_INV_CONN_HANDLE:
 		ts->resp = SAS_TASK_UNDELIVERED;
 		ts->stat = SAS_DEVICE_UNKNOWN;
 		break;
 	case TF_REQUESTED_N_PENDING:
diff --git a/drivers/scsi/be2iscsi/be_mgmt.c b/drivers/scsi/be2iscsi/be_mgmt.c
index 96d6e384b2b2..0d4928567265 100644
--- a/drivers/scsi/be2iscsi/be_mgmt.c
+++ b/drivers/scsi/be2iscsi/be_mgmt.c
@@ -1242,22 +1242,18 @@ beiscsi_adap_family_disp(struct device *dev, struct device_attribute *attr,
 	case BE_DEVICE_ID1:
 	case OC_DEVICE_ID1:
 	case OC_DEVICE_ID2:
 		return snprintf(buf, PAGE_SIZE,
 				"Obsolete/Unsupported BE2 Adapter Family\n");
-		break;
 	case BE_DEVICE_ID2:
 	case OC_DEVICE_ID3:
 		return snprintf(buf, PAGE_SIZE, "BE3-R Adapter Family\n");
-		break;
 	case OC_SKH_ID1:
 		return snprintf(buf, PAGE_SIZE, "Skyhawk-R Adapter Family\n");
-		break;
 	default:
 		return snprintf(buf, PAGE_SIZE,
 				"Unknown Adapter Family: 0x%x\n", dev_id);
-		break;
 	}
 }
 
 /**
  * beiscsi_phys_port()- Display Physical Port Identifier
diff --git a/drivers/scsi/bnx2fc/bnx2fc_hwi.c b/drivers/scsi/bnx2fc/bnx2fc_hwi.c
index 08992095ce7a..b37b0a9ec12d 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_hwi.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_hwi.c
@@ -768,11 +768,10 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
 				if (rc)
 					goto skip_rec;
 			} else
 				printk(KERN_ERR PFX "SRR in progress\n");
 			goto ret_err_rqe;
-			break;
 		default:
 			break;
 		}
 
 skip_rec:
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 0f9274960dc6..a4be6f439c47 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -1892,11 +1892,10 @@ static int fcoe_device_notification(struct notifier_block *notifier,
 			fcoe_interface_remove(fcoe);
 		fcoe_interface_cleanup(fcoe);
 		mutex_unlock(&fcoe_config_mutex);
 		fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr));
 		goto out;
-		break;
 	case NETDEV_FEAT_CHANGE:
 		fcoe_netdev_features_change(lport, netdev);
 		break;
 	default:
 		FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 83ce4f11a589..45136e3a4efc 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -7440,11 +7440,10 @@ static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
 				break;
 			default:	/* reserved in PCI 2.2 */
 				dev_warn(&pdev->dev,
 				       "base address is invalid\n");
 				return -1;
-				break;
 			}
 		}
 		if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
 			return i + 1;
 	}
diff --git a/drivers/scsi/hptiop.c b/drivers/scsi/hptiop.c
index 6a2561f26e38..db4c7a7ff4dd 100644
--- a/drivers/scsi/hptiop.c
+++ b/drivers/scsi/hptiop.c
@@ -756,11 +756,10 @@ static void hptiop_finish_scsi_req(struct hptiop_hba *hba, u32 tag,
 		scsi_set_resid(scp,
 			scsi_bufflen(scp) - le32_to_cpu(req->dataxfer_length));
 		scp->result = SAM_STAT_CHECK_CONDITION;
 		memcpy(scp->sense_buffer, &req->sg_list, SCSI_SENSE_BUFFERSIZE);
 		goto skip_resid;
-		break;
 
 	default:
 		scp->result = DRIVER_INVALID << 24 | DID_ABORT << 16;
 		break;
 	}
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index b0aa58d117cc..e451102b9a29 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -9485,11 +9485,10 @@ static pci_ers_result_t ipr_pci_error_detected(struct pci_dev *pdev,
 		ipr_pci_frozen(pdev);
 		return PCI_ERS_RESULT_CAN_RECOVER;
 	case pci_channel_io_perm_failure:
 		ipr_pci_perm_failure(pdev);
 		return PCI_ERS_RESULT_DISCONNECT;
-		break;
 	default:
 		break;
 	}
 	return PCI_ERS_RESULT_NEED_RESET;
 }
diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
index 7041e2e3ab48..1b87d9080ebe 100644
--- a/drivers/scsi/isci/phy.c
+++ b/drivers/scsi/isci/phy.c
@@ -751,11 +751,10 @@ enum sci_status sci_phy_event_handler(struct isci_phy *iphy, u32 event_code)
 		       sci_change_state(&iphy->sm, SCI_PHY_STARTING);
 		       break;
 		default:
 			phy_event_warn(iphy, state, event_code);
 			return SCI_FAILURE;
-			break;
 		}
 		return SCI_SUCCESS;
 	case SCI_PHY_SUB_AWAIT_IAF_UF:
 		switch (scu_get_event_code(event_code)) {
 		case SCU_EVENT_SAS_PHY_DETECTED:
@@ -956,11 +955,10 @@ enum sci_status sci_phy_event_handler(struct isci_phy *iphy, u32 event_code)
 			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
 			break;
 		default:
 			phy_event_warn(iphy, state, event_code);
 			return SCI_FAILURE_INVALID_STATE;
-			break;
 		}
 		return SCI_SUCCESS;
 	default:
 		dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
 			__func__, phy_state_name(state));
diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
index c9a327b13e5c..325081ac6553 100644
--- a/drivers/scsi/lpfc/lpfc_debugfs.c
+++ b/drivers/scsi/lpfc/lpfc_debugfs.c
@@ -3339,11 +3339,10 @@ lpfc_idiag_pcicfg_read(struct file *file, char __user *buf, size_t nbytes,
 		len += scnprintf(pbuffer+len, LPFC_PCI_CFG_SIZE-len,
 				"%03x: %08x\n", where, u32val);
 		break;
 	case LPFC_PCI_CFG_BROWSE: /* browse all */
 		goto pcicfg_browse;
-		break;
 	default:
 		/* illegal count */
 		len = 0;
 		break;
 	}
@@ -4379,11 +4378,11 @@ lpfc_idiag_queacc_write(struct file *file, const char __user *buf,
 					goto pass_check;
 				}
 			}
 		}
 		goto error_out;
-		break;
+
 	case LPFC_IDIAG_CQ:
 		/* MBX complete queue */
 		if (phba->sli4_hba.mbx_cq &&
 		    phba->sli4_hba.mbx_cq->queue_id == queid) {
 			/* Sanity check */
@@ -4431,11 +4430,11 @@ lpfc_idiag_queacc_write(struct file *file, const char __user *buf,
 					goto pass_check;
 				}
 			}
 		}
 		goto error_out;
-		break;
+
 	case LPFC_IDIAG_MQ:
 		/* MBX work queue */
 		if (phba->sli4_hba.mbx_wq &&
 		    phba->sli4_hba.mbx_wq->queue_id == queid) {
 			/* Sanity check */
@@ -4445,11 +4444,11 @@ lpfc_idiag_queacc_write(struct file *file, const char __user *buf,
 				goto error_out;
 			idiag.ptr_private = phba->sli4_hba.mbx_wq;
 			goto pass_check;
 		}
 		goto error_out;
-		break;
+
 	case LPFC_IDIAG_WQ:
 		/* ELS work queue */
 		if (phba->sli4_hba.els_wq &&
 		    phba->sli4_hba.els_wq->queue_id == queid) {
 			/* Sanity check */
@@ -4485,13 +4484,12 @@ lpfc_idiag_queacc_write(struct file *file, const char __user *buf,
 					idiag.ptr_private = qp;
 					goto pass_check;
 				}
 			}
 		}
-
 		goto error_out;
-		break;
+
 	case LPFC_IDIAG_RQ:
 		/* HDR queue */
 		if (phba->sli4_hba.hdr_rq &&
 		    phba->sli4_hba.hdr_rq->queue_id == queid) {
 			/* Sanity check */
@@ -4512,14 +4510,12 @@ lpfc_idiag_queacc_write(struct file *file, const char __user *buf,
 				goto error_out;
 			idiag.ptr_private = phba->sli4_hba.dat_rq;
 			goto pass_check;
 		}
 		goto error_out;
-		break;
 	default:
 		goto error_out;
-		break;
 	}
 
 pass_check:
 
 	if (idiag.cmd.opcode == LPFC_IDIAG_CMD_QUEACC_RD) {
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index ca25e54bb782..b6090357e8a5 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -7194,11 +7194,10 @@ lpfc_init_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
 	default:
 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 				"1431 Invalid HBA PCI-device group: 0x%x\n",
 				dev_grp);
 		return -ENODEV;
-		break;
 	}
 	return 0;
 }
 
 /**
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 983eeb0e3d07..c3b02dab6e5c 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -4282,11 +4282,10 @@ lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
 	default:
 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 				"1418 Invalid HBA PCI-device group: 0x%x\n",
 				dev_grp);
 		return -ENODEV;
-		break;
 	}
 	phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
 	phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 	return 0;
 }
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index e158cd77d387..0f18f1ba8a28 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -9187,11 +9187,10 @@ lpfc_mbox_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
 	default:
 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 				"1420 Invalid HBA PCI-device group: 0x%x\n",
 				dev_grp);
 		return -ENODEV;
-		break;
 	}
 	return 0;
 }
 
 /**
@@ -10070,11 +10069,10 @@ lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
 	default:
 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 				"2014 Invalid command 0x%x\n",
 				iocbq->iocb.ulpCommand);
 		return IOCB_ERROR;
-		break;
 	}
 
 	if (iocbq->iocb_flag & LPFC_IO_DIF_PASS)
 		bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_PASSTHRU);
 	else if (iocbq->iocb_flag & LPFC_IO_DIF_STRIP)
@@ -10232,11 +10230,10 @@ lpfc_sli_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
 	default:
 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 				"1419 Invalid HBA PCI-device group: 0x%x\n",
 				dev_grp);
 		return -ENODEV;
-		break;
 	}
 	phba->lpfc_get_iocb_from_iocbq = lpfc_get_iocb_from_iocbq;
 	return 0;
 }
 
diff --git a/drivers/scsi/mvumi.c b/drivers/scsi/mvumi.c
index 0354898d7cac..2f7a52bd653a 100644
--- a/drivers/scsi/mvumi.c
+++ b/drivers/scsi/mvumi.c
@@ -2294,11 +2294,10 @@ static int mvumi_cfg_hw_reg(struct mvumi_hba *mhba)
 		regs->int_drbl_int_mask     = 0x3FFFFFFF;
 		regs->int_mu = regs->int_dl_cpu2pciea | regs->int_comaout;
 		break;
 	default:
 		return -1;
-		break;
 	}
 
 	return 0;
 }
 
diff --git a/drivers/scsi/pcmcia/nsp_cs.c b/drivers/scsi/pcmcia/nsp_cs.c
index bc5a623519e7..bb3b3884f968 100644
--- a/drivers/scsi/pcmcia/nsp_cs.c
+++ b/drivers/scsi/pcmcia/nsp_cs.c
@@ -1100,12 +1100,10 @@ static irqreturn_t nspintr(int irq, void *dev_id)
 		nsp_index_write(base, SCSIBUSCTRL, SCSI_ATN);
 		udelay(1);
 		nsp_index_write(base, SCSIBUSCTRL, SCSI_ATN | AUTODIRECTION | ACKENB);
 		return IRQ_HANDLED;
 
-		break;
-
 	case PH_RESELECT:
 		//nsp_dbg(NSP_DEBUG_INTR, "phase reselect");
 		// *sync_neg = SYNC_NOT_YET;
 		if ((phase & BUSMON_PHASE_MASK) != BUSPHASE_MESSAGE_IN) {
 
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 07afd0d8a8f3..40af7f1524ce 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -4028,11 +4028,10 @@ qla24xx_report_id_acquisition(scsi_qla_host_t *vha,
 
 			/* if our portname is higher then initiate N2N login */
 
 			set_bit(N2N_LOGIN_NEEDED, &vha->dpc_flags);
 			return;
-			break;
 		case TOPO_FL:
 			ha->current_topology = ISP_CFG_FL;
 			break;
 		case TOPO_F:
 			ha->current_topology = ISP_CFG_F;
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index e2e5356a997d..43f7624508a9 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -2844,11 +2844,10 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
 		fileno = blkno = at_sm = 0;
 		break;
 	case MTNOP:
 		DEBC_printk(STp, "No op on tape.\n");
 		return 0;	/* Should do something ? */
-		break;
 	case MTRETEN:
 		cmd[0] = START_STOP;
 		if (STp->immediate) {
 			cmd[1] = 1;	/* Don't wait for completion */
 			timeout = STp->device->request_queue->rq_timeout;
diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c b/drivers/scsi/sym53c8xx_2/sym_hipd.c
index a9fe092a4906..255a2d48d421 100644
--- a/drivers/scsi/sym53c8xx_2/sym_hipd.c
+++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c
@@ -4594,11 +4594,10 @@ static void sym_int_sir(struct sym_hcb *np)
 				sym_print_addr(cp->cmd,
 					"M_REJECT received (%x:%x).\n",
 					scr_to_cpu(np->lastmsg), np->msgout[0]);
 			}
 			goto out_clrack;
-			break;
 		default:
 			goto out_reject;
 		}
 		break;
 	/*
diff --git a/drivers/staging/media/atomisp/pci/sh_css.c b/drivers/staging/media/atomisp/pci/sh_css.c
index ddee04c8248d..eab7a048ca7a 100644
--- a/drivers/staging/media/atomisp/pci/sh_css.c
+++ b/drivers/staging/media/atomisp/pci/sh_css.c
@@ -6284,11 +6284,10 @@ allocate_delay_frames(struct ia_css_pipe *pipe) {
 	case IA_CSS_PIPE_ID_CAPTURE: {
 		struct ia_css_capture_settings *mycs_capture = &pipe->pipe_settings.capture;
 		(void)mycs_capture;
 		return err;
 	}
-	break;
 	case IA_CSS_PIPE_ID_VIDEO: {
 		struct ia_css_video_settings *mycs_video = &pipe->pipe_settings.video;
 
 		ref_info = mycs_video->video_binary.internal_frame_info;
 		/*The ref frame expects
diff --git a/drivers/staging/rts5208/rtsx_scsi.c b/drivers/staging/rts5208/rtsx_scsi.c
index 1deb74112ad4..672248be7bf3 100644
--- a/drivers/staging/rts5208/rtsx_scsi.c
+++ b/drivers/staging/rts5208/rtsx_scsi.c
@@ -569,12 +569,10 @@ static int start_stop_unit(struct scsi_cmnd *srb, struct rtsx_chip *chip)
 	case LOAD_MEDIUM:
 		if (check_card_ready(chip, lun))
 			return TRANSPORT_GOOD;
 		set_sense_type(chip, lun, SENSE_TYPE_MEDIA_NOT_PRESENT);
 		return TRANSPORT_FAILED;
-
-		break;
 	}
 
 	return TRANSPORT_ERROR;
 }
 
diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c
index fd0ea4dbcb91..7c7d3858e6ca 100644
--- a/drivers/staging/vme/devices/vme_user.c
+++ b/drivers/staging/vme/devices/vme_user.c
@@ -355,12 +355,10 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
 			 *	to userspace as they are
 			 */
 			return vme_master_set(image[minor].resource,
 				master.enable, master.vme_addr, master.size,
 				master.aspace, master.cycle, master.dwidth);
-
-			break;
 		}
 		break;
 	case SLAVE_MINOR:
 		switch (cmd) {
 		case VME_GET_SLAVE:
@@ -396,12 +394,10 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
 			 */
 			return vme_slave_set(image[minor].resource,
 				slave.enable, slave.vme_addr, slave.size,
 				image[minor].pci_buf, slave.aspace,
 				slave.cycle);
-
-			break;
 		}
 		break;
 	}
 
 	return -EINVAL;
diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
index d42b854cb7df..861e95043191 100644
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -412,15 +412,13 @@ static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
 	switch (size_bytes) {
 	case 2:	/* 2 bytes */
 		buf16 = (u16 *) buf;
 		*buf16 = __le16_to_cpu(readw(ptr));
 		goto out;
-		break;
 	case 4:	/* 4 bytes */
 		*(buf) = __le32_to_cpu(readl(ptr));
 		goto out;
-		break;
 	}
 
 	while (i < size_bytes) {
 		if (size_bytes - i == 2) {
 			/* Handle 2 bytes in the end */
@@ -458,19 +456,18 @@ static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
 	switch (size_bytes) {
 	case 2:	/* 2 bytes */
 		buf16 = (const u16 *)buf;
 		writew(__cpu_to_le16(*buf16), ptr);
 		return 2;
-		break;
 	case 1: /*
 		 * also needs to write 4 bytes in this case
 		 * so falling through..
 		 */
+		fallthrough;
 	case 4: /* 4 bytes */
 		writel(__cpu_to_le32(*buf), ptr);
 		return 4;
-		break;
 	}
 
 	while (i < size_bytes) {
 		if (size_bytes - i == 2) {
 			/* 2 bytes */
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 1731d9728865..09703079db7b 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -318,31 +318,26 @@ static void imx_uart_writel(struct imx_port *sport, u32 val, u32 offset)
 static u32 imx_uart_readl(struct imx_port *sport, u32 offset)
 {
 	switch (offset) {
 	case UCR1:
 		return sport->ucr1;
-		break;
 	case UCR2:
 		/*
 		 * UCR2_SRST is the only bit in the cached registers that might
 		 * differ from the value that was last written. As it only
 		 * automatically becomes one after being cleared, reread
 		 * conditionally.
 		 */
 		if (!(sport->ucr2 & UCR2_SRST))
 			sport->ucr2 = readl(sport->port.membase + offset);
 		return sport->ucr2;
-		break;
 	case UCR3:
 		return sport->ucr3;
-		break;
 	case UCR4:
 		return sport->ucr4;
-		break;
 	case UFCR:
 		return sport->ufcr;
-		break;
 	default:
 		return readl(sport->port.membase + offset);
 	}
 }
 
diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
index 1125f4715830..5204769834d1 100644
--- a/drivers/usb/gadget/function/f_hid.c
+++ b/drivers/usb/gadget/function/f_hid.c
@@ -509,27 +509,23 @@ static int hidg_setup(struct usb_function *f,
 		VDBG(cdev, "get_report\n");
 
 		/* send an empty report */
 		length = min_t(unsigned, length, hidg->report_length);
 		memset(req->buf, 0x0, length);
-
 		goto respond;
-		break;
 
 	case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 		  | HID_REQ_GET_PROTOCOL):
 		VDBG(cdev, "get_protocol\n");
 		length = min_t(unsigned int, length, 1);
 		((u8 *) req->buf)[0] = hidg->protocol;
 		goto respond;
-		break;
 
 	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 		  | HID_REQ_SET_REPORT):
 		VDBG(cdev, "set_report | wLength=%d\n", ctrl->wLength);
 		goto stall;
-		break;
 
 	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 		  | HID_REQ_SET_PROTOCOL):
 		VDBG(cdev, "set_protocol\n");
 		if (value > HID_REPORT_PROTOCOL)
@@ -542,11 +538,10 @@ static int hidg_setup(struct usb_function *f,
 		if (hidg->bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
 			hidg->protocol = value;
 			goto respond;
 		}
 		goto stall;
-		break;
 
 	case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8
 		  | USB_REQ_GET_DESCRIPTOR):
 		switch (value >> 8) {
 		case HID_DT_HID:
@@ -560,33 +555,29 @@ static int hidg_setup(struct usb_function *f,
 
 			length = min_t(unsigned short, length,
 						   hidg_desc_copy.bLength);
 			memcpy(req->buf, &hidg_desc_copy, length);
 			goto respond;
-			break;
 		}
 		case HID_DT_REPORT:
 			VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: REPORT\n");
 			length = min_t(unsigned short, length,
 						   hidg->report_desc_length);
 			memcpy(req->buf, hidg->report_desc, length);
 			goto respond;
-			break;
 
 		default:
 			VDBG(cdev, "Unknown descriptor request 0x%x\n",
 				 value >> 8);
 			goto stall;
-			break;
 		}
 		break;
 
 	default:
 		VDBG(cdev, "Unknown request 0x%x\n",
 			 ctrl->bRequest);
 		goto stall;
-		break;
 	}
 
 stall:
 	return -EOPNOTSUPP;
 
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index fe405cd38dbc..b46ef45c4d25 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1142,11 +1142,10 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
 		max_packets = MAX_PACKET(8);
 		break;
 	case USB_SPEED_WIRELESS:
 		xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n");
 		return -EINVAL;
-		break;
 	default:
 		/* Speed was set earlier, this shouldn't happen. */
 		return -EINVAL;
 	}
 	/* Find the root hub port this device is under */
diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
index 70ec29681526..efbd317f2f25 100644
--- a/drivers/usb/misc/iowarrior.c
+++ b/drivers/usb/misc/iowarrior.c
@@ -382,11 +382,10 @@ static ssize_t iowarrior_write(struct file *file,
 			goto exit;
 		}
 		retval = usb_set_report(dev->interface, 2, 0, buf, count);
 		kfree(buf);
 		goto exit;
-		break;
 	case USB_DEVICE_ID_CODEMERCS_IOW56:
 	case USB_DEVICE_ID_CODEMERCS_IOW56AM:
 	case USB_DEVICE_ID_CODEMERCS_IOW28:
 	case USB_DEVICE_ID_CODEMERCS_IOW28L:
 	case USB_DEVICE_ID_CODEMERCS_IOW100:
@@ -452,18 +451,16 @@ static ssize_t iowarrior_write(struct file *file,
 		}
 		/* submit was ok */
 		retval = count;
 		usb_free_urb(int_out_urb);
 		goto exit;
-		break;
 	default:
 		/* what do we have here ? An unsupported Product-ID ? */
 		dev_err(&dev->interface->dev, "%s - not supported for product=0x%x\n",
 			__func__, dev->product_id);
 		retval = -EFAULT;
 		goto exit;
-		break;
 	}
 error:
 	usb_free_coherent(dev->udev, dev->report_size, buf,
 			  int_out_urb->transfer_dma);
 error_no_buffer:
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index b4ba79123d9d..f1201d4de297 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -848,11 +848,10 @@ static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
 		dataout[DataCount++] = 0x04;
 		break;
 	default:
 		kfree(dataout);
 		return IUU_INVALID_PARAMETER;
-		break;
 	}
 
 	switch (parity & 0xF0) {
 	case IUU_ONE_STOP_BIT:
 		dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
@@ -862,11 +861,10 @@ static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
 		dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
 		break;
 	default:
 		kfree(dataout);
 		return IUU_INVALID_PARAMETER;
-		break;
 	}
 
 	status = bulk_immediate(port, dataout, DataCount);
 	if (status != IUU_OPERATION_OK)
 		dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
diff --git a/drivers/usb/storage/freecom.c b/drivers/usb/storage/freecom.c
index 3d5f7d0ff0f1..2b098b55c4cb 100644
--- a/drivers/usb/storage/freecom.c
+++ b/drivers/usb/storage/freecom.c
@@ -429,11 +429,10 @@ static int freecom_transport(struct scsi_cmnd *srb, struct us_data *us)
 		/* should never hit here -- filtered in usb.c */
 		usb_stor_dbg(us, "freecom unimplemented direction: %d\n",
 			     us->srb->sc_data_direction);
 		/* Return fail, SCSI seems to handle this better. */
 		return USB_STOR_TRANSPORT_FAILED;
-		break;
 	}
 
 	return USB_STOR_TRANSPORT_GOOD;
 }
 
diff --git a/drivers/vme/bridges/vme_tsi148.c b/drivers/vme/bridges/vme_tsi148.c
index 50ae26977a02..1227ea937059 100644
--- a/drivers/vme/bridges/vme_tsi148.c
+++ b/drivers/vme/bridges/vme_tsi148.c
@@ -504,11 +504,10 @@ static int tsi148_slave_set(struct vme_slave_resource *image, int enabled,
 		addr |= TSI148_LCSR_ITAT_AS_A64;
 		break;
 	default:
 		dev_err(tsi148_bridge->parent, "Invalid address space\n");
 		return -EINVAL;
-		break;
 	}
 
 	/* Convert 64-bit variables to 2x 32-bit variables */
 	reg_split(vme_base, &vme_base_high, &vme_base_low);
 
@@ -993,11 +992,10 @@ static int tsi148_master_set(struct vme_master_resource *image, int enabled,
 	default:
 		spin_unlock(&image->lock);
 		dev_err(tsi148_bridge->parent, "Invalid address space\n");
 		retval = -EINVAL;
 		goto err_aspace;
-		break;
 	}
 
 	temp_ctl &= ~(3<<4);
 	if (cycle & VME_SUPER)
 		temp_ctl |= TSI148_LCSR_OTAT_SUP;
@@ -1501,11 +1499,10 @@ static int tsi148_dma_set_vme_src_attributes(struct device *dev, __be32 *attr,
 		val |= TSI148_LCSR_DSAT_AMODE_USER4;
 		break;
 	default:
 		dev_err(dev, "Invalid address space\n");
 		return -EINVAL;
-		break;
 	}
 
 	if (cycle & VME_SUPER)
 		val |= TSI148_LCSR_DSAT_SUP;
 	if (cycle & VME_PROG)
@@ -1601,11 +1598,10 @@ static int tsi148_dma_set_vme_dest_attributes(struct device *dev, __be32 *attr,
 		val |= TSI148_LCSR_DDAT_AMODE_USER4;
 		break;
 	default:
 		dev_err(dev, "Invalid address space\n");
 		return -EINVAL;
-		break;
 	}
 
 	if (cycle & VME_SUPER)
 		val |= TSI148_LCSR_DDAT_SUP;
 	if (cycle & VME_PROG)
@@ -1699,11 +1695,10 @@ static int tsi148_dma_list_add(struct vme_dma_list *list,
 		break;
 	default:
 		dev_err(tsi148_bridge->parent, "Invalid source type\n");
 		retval = -EINVAL;
 		goto err_source;
-		break;
 	}
 
 	/* Assume last link - this will be over-written by adding another */
 	entry->descriptor.dnlau = cpu_to_be32(0);
 	entry->descriptor.dnlal = cpu_to_be32(TSI148_LCSR_DNLAL_LLA);
@@ -1736,11 +1731,10 @@ static int tsi148_dma_list_add(struct vme_dma_list *list,
 		break;
 	default:
 		dev_err(tsi148_bridge->parent, "Invalid destination type\n");
 		retval = -EINVAL;
 		goto err_dest;
-		break;
 	}
 
 	/* Fill out count */
 	entry->descriptor.dcnt = cpu_to_be32((u32)count);
 
@@ -1962,11 +1956,10 @@ static int tsi148_lm_set(struct vme_lm_resource *lm, unsigned long long lm_base,
 		break;
 	default:
 		mutex_unlock(&lm->mtx);
 		dev_err(tsi148_bridge->parent, "Invalid address space\n");
 		return -EINVAL;
-		break;
 	}
 
 	if (cycle & VME_SUPER)
 		lm_ctl |= TSI148_LCSR_LMAT_SUPR ;
 	if (cycle & VME_USER)
diff --git a/drivers/vme/vme.c b/drivers/vme/vme.c
index b398293980b6..e1a940e43327 100644
--- a/drivers/vme/vme.c
+++ b/drivers/vme/vme.c
@@ -50,27 +50,22 @@ static struct vme_bridge *find_bridge(struct vme_resource *resource)
 	/* Get list to search */
 	switch (resource->type) {
 	case VME_MASTER:
 		return list_entry(resource->entry, struct vme_master_resource,
 			list)->parent;
-		break;
 	case VME_SLAVE:
 		return list_entry(resource->entry, struct vme_slave_resource,
 			list)->parent;
-		break;
 	case VME_DMA:
 		return list_entry(resource->entry, struct vme_dma_resource,
 			list)->parent;
-		break;
 	case VME_LM:
 		return list_entry(resource->entry, struct vme_lm_resource,
 			list)->parent;
-		break;
 	default:
 		printk(KERN_ERR "Unknown resource type\n");
 		return NULL;
-		break;
 	}
 }
 
 /**
  * vme_free_consistent - Allocate contiguous memory.
@@ -177,26 +172,22 @@ size_t vme_get_size(struct vme_resource *resource)
 			&aspace, &cycle, &dwidth);
 		if (retval)
 			return 0;
 
 		return size;
-		break;
 	case VME_SLAVE:
 		retval = vme_slave_get(resource, &enabled, &base, &size,
 			&buf_base, &aspace, &cycle);
 		if (retval)
 			return 0;
 
 		return size;
-		break;
 	case VME_DMA:
 		return 0;
-		break;
 	default:
 		printk(KERN_ERR "Unknown resource type\n");
 		return 0;
-		break;
 	}
 }
 EXPORT_SYMBOL(vme_get_size);
 
 int vme_check_window(u32 aspace, unsigned long long vme_base,
diff --git a/drivers/watchdog/geodewdt.c b/drivers/watchdog/geodewdt.c
index 83418924e30a..0b699c783d57 100644
--- a/drivers/watchdog/geodewdt.c
+++ b/drivers/watchdog/geodewdt.c
@@ -148,12 +148,10 @@ static long geodewdt_ioctl(struct file *file, unsigned int cmd,
 
 	switch (cmd) {
 	case WDIOC_GETSUPPORT:
 		return copy_to_user(argp, &ident,
 				    sizeof(ident)) ? -EFAULT : 0;
-		break;
-
 	case WDIOC_GETSTATUS:
 	case WDIOC_GETBOOTSTATUS:
 		return put_user(0, p);
 
 	case WDIOC_SETOPTIONS:
diff --git a/fs/efs/inode.c b/fs/efs/inode.c
index 89e73a6f0d36..64f3a54a0f72 100644
--- a/fs/efs/inode.c
+++ b/fs/efs/inode.c
@@ -161,11 +161,10 @@ struct inode *efs_iget(struct super_block *super, unsigned long ino)
 			init_special_inode(inode, inode->i_mode, device);
 			break;
 		default:
 			pr_warn("unsupported inode mode %o\n", inode->i_mode);
 			goto read_inode_error;
-			break;
 	}
 
 	unlock_new_inode(inode);
 	return inode;
         
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index 79a231719460..3bd8119bed5e 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -1196,11 +1196,10 @@ static int o2net_process_message(struct o2net_sock_container *sc,
 			break;
 		default:
 			msglog(hdr, "bad magic\n");
 			ret = -EINVAL;
 			goto out;
-			break;
 	}
 
 	/* find a handler for it */
 	handler_status = 0;
 	nmh = o2net_handler_get(be16_to_cpu(hdr->msg_type),
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 1110ecd7d1f3..8f50c9c19f1b 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -2911,11 +2911,10 @@ attach_type_to_prog_type(enum bpf_attach_type attach_type)
 {
 	switch (attach_type) {
 	case BPF_CGROUP_INET_INGRESS:
 	case BPF_CGROUP_INET_EGRESS:
 		return BPF_PROG_TYPE_CGROUP_SKB;
-		break;
 	case BPF_CGROUP_INET_SOCK_CREATE:
 	case BPF_CGROUP_INET_SOCK_RELEASE:
 	case BPF_CGROUP_INET4_POST_BIND:
 	case BPF_CGROUP_INET6_POST_BIND:
 		return BPF_PROG_TYPE_CGROUP_SOCK;
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 3dd8c2e4314e..f400a6122b3c 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -179,11 +179,10 @@ enum hash_algo ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value,
 	case EVM_IMA_XATTR_DIGSIG:
 		sig = (typeof(sig))xattr_value;
 		if (sig->version != 2 || xattr_len <= sizeof(*sig))
 			return ima_hash_algo;
 		return sig->hash_algo;
-		break;
 	case IMA_XATTR_DIGEST_NG:
 		/* first byte contains algorithm id */
 		ret = xattr_value->data[0];
 		if (ret < HASH_ALGO__LAST)
 			return ret;
diff --git a/security/keys/trusted-keys/trusted_tpm1.c b/security/keys/trusted-keys/trusted_tpm1.c
index b9fe02e5f84f..eddc9477d42a 100644
--- a/security/keys/trusted-keys/trusted_tpm1.c
+++ b/security/keys/trusted-keys/trusted_tpm1.c
@@ -899,11 +899,10 @@ static int datablob_parse(char *datablob, struct trusted_key_payload *p,
 			return ret;
 		ret = Opt_update;
 		break;
 	case Opt_err:
 		return -EINVAL;
-		break;
 	}
 	return ret;
 }
 
 static struct trusted_key_options *trusted_options_alloc(void)
diff --git a/security/safesetid/lsm.c b/security/safesetid/lsm.c
index 8a176b6adbe5..1079c6d54784 100644
--- a/security/safesetid/lsm.c
+++ b/security/safesetid/lsm.c
@@ -123,11 +123,10 @@ static int safesetid_security_capable(const struct cred *cred,
 		 * set*uid() (e.g. setting up userns uid mappings).
 		 */
 		pr_warn("Operation requires CAP_SETUID, which is not available to UID %u for operations besides approved set*uid transitions\n",
 			__kuid_val(cred->uid));
 		return -EPERM;
-		break;
 	case CAP_SETGID:
 		/*
 		* If no policy applies to this task, allow the use of CAP_SETGID for
 		* other purposes.
 		*/
@@ -138,15 +137,13 @@ static int safesetid_security_capable(const struct cred *cred,
 		 * set*gid() (e.g. setting up userns gid mappings).
 		 */
 		pr_warn("Operation requires CAP_SETGID, which is not available to GID %u for operations besides approved set*gid transitions\n",
 			__kuid_val(cred->uid));
 		return -EPERM;
-		break;
 	default:
 		/* Error, the only capabilities were checking for is CAP_SETUID/GID */
 		return 0;
-		break;
 	}
 	return 0;
 }
 
 /*
diff --git a/sound/pci/rme32.c b/sound/pci/rme32.c
index 869af8a32c98..4eabece4dcba 100644
--- a/sound/pci/rme32.c
+++ b/sound/pci/rme32.c
@@ -466,11 +466,10 @@ static int snd_rme32_capture_getrate(struct rme32 * rme32, int *is_adat)
 			return 44100;
 		case 7:
 			return 32000;
 		default:
 			return -1;
-			break;
 		} 
 	else
 		switch (n) {	/* supporting the CS8412 */
 		case 0:
 			return -1;
diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 4a1f576dd9cf..3382c069fd3d 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -2284,11 +2284,10 @@ static int hdspm_get_wc_sample_rate(struct hdspm *hdspm)
 	switch (hdspm->io_type) {
 	case RayDAT:
 	case AIO:
 		status = hdspm_read(hdspm, HDSPM_RD_STATUS_1);
 		return (status >> 16) & 0xF;
-		break;
 	case AES32:
 		status = hdspm_read(hdspm, HDSPM_statusRegister);
 		return (status >> HDSPM_AES32_wcFreq_bit) & 0xF;
 	default:
 		break;
@@ -2310,11 +2309,10 @@ static int hdspm_get_tco_sample_rate(struct hdspm *hdspm)
 		switch (hdspm->io_type) {
 		case RayDAT:
 		case AIO:
 			status = hdspm_read(hdspm, HDSPM_RD_STATUS_1);
 			return (status >> 20) & 0xF;
-			break;
 		case AES32:
 			status = hdspm_read(hdspm, HDSPM_statusRegister);
 			return (status >> 1) & 0xF;
 		default:
 			break;
@@ -2336,11 +2334,10 @@ static int hdspm_get_sync_in_sample_rate(struct hdspm *hdspm)
 		switch (hdspm->io_type) {
 		case RayDAT:
 		case AIO:
 			status = hdspm_read(hdspm, HDSPM_RD_STATUS_2);
 			return (status >> 12) & 0xF;
-			break;
 		default:
 			break;
 		}
 	}
 
@@ -2356,11 +2353,10 @@ static int hdspm_get_aes_sample_rate(struct hdspm *hdspm, int index)
 
 	switch (hdspm->io_type) {
 	case AES32:
 		timecode = hdspm_read(hdspm, HDSPM_timecodeRegister);
 		return (timecode >> (4*index)) & 0xF;
-		break;
 	default:
 		break;
 	}
 	return 0;
 }
@@ -3843,22 +3839,20 @@ static int hdspm_wc_sync_check(struct hdspm *hdspm)
 				return 2;
 			else
 				return 1;
 		}
 		return 0;
-		break;
 
 	case MADI:
 		status2 = hdspm_read(hdspm, HDSPM_statusRegister2);
 		if (status2 & HDSPM_wcLock) {
 			if (status2 & HDSPM_wcSync)
 				return 2;
 			else
 				return 1;
 		}
 		return 0;
-		break;
 
 	case RayDAT:
 	case AIO:
 		status = hdspm_read(hdspm, HDSPM_statusRegister);
 
@@ -3866,12 +3860,10 @@ static int hdspm_wc_sync_check(struct hdspm *hdspm)
 			return 2;
 		else if (status & 0x1000000)
 			return 1;
 		return 0;
 
-		break;
-
 	case MADIface:
 		break;
 	}
 
 
diff --git a/sound/pci/rme9652/rme9652.c b/sound/pci/rme9652/rme9652.c
index 7ab10028d9fa..012fbec5e6a7 100644
--- a/sound/pci/rme9652/rme9652.c
+++ b/sound/pci/rme9652/rme9652.c
@@ -730,38 +730,31 @@ static inline int rme9652_spdif_sample_rate(struct snd_rme9652 *s)
 	rate_bits = rme9652_read(s, RME9652_status_register) & RME9652_F;
 
 	switch (rme9652_decode_spdif_rate(rate_bits)) {
 	case 0x7:
 		return 32000;
-		break;
 
 	case 0x6:
 		return 44100;
-		break;
 
 	case 0x5:
 		return 48000;
-		break;
 
 	case 0x4:
 		return 88200;
-		break;
 
 	case 0x3:
 		return 96000;
-		break;
 
 	case 0x0:
 		return 64000;
-		break;
 
 	default:
 		dev_err(s->card->dev,
 			"%s: unknown S/PDIF input rate (bits = 0x%x)\n",
 			   s->card_name, rate_bits);
 		return 0;
-		break;
 	}
 }
 
 /*-----------------------------------------------------------------------------
   Control Interface
diff --git a/sound/soc/codecs/wcd-clsh-v2.c b/sound/soc/codecs/wcd-clsh-v2.c
index 1be82113c59a..817d8259758c 100644
--- a/sound/soc/codecs/wcd-clsh-v2.c
+++ b/sound/soc/codecs/wcd-clsh-v2.c
@@ -478,11 +478,10 @@ static int _wcd_clsh_ctrl_set_state(struct wcd_clsh_ctrl *ctrl, int req_state,
 		wcd_clsh_state_hph_l(ctrl, req_state, is_enable, mode);
 		break;
 	case WCD_CLSH_STATE_HPHR:
 		wcd_clsh_state_hph_r(ctrl, req_state, is_enable, mode);
 		break;
-		break;
 	case WCD_CLSH_STATE_LO:
 		wcd_clsh_state_lo(ctrl, req_state, is_enable, mode);
 		break;
 	default:
 		break;
diff --git a/sound/soc/codecs/wl1273.c b/sound/soc/codecs/wl1273.c
index c56b9329240f..d8ced4559bf2 100644
--- a/sound/soc/codecs/wl1273.c
+++ b/sound/soc/codecs/wl1273.c
@@ -309,11 +309,10 @@ static int wl1273_startup(struct snd_pcm_substream *substream,
 			return -EINVAL;
 		}
 		break;
 	default:
 		return -EINVAL;
-		break;
 	}
 
 	return 0;
 }
 
diff --git a/sound/soc/intel/skylake/skl-pcm.c b/sound/soc/intel/skylake/skl-pcm.c
index bbe8d782e0af..b1ca64d2f7ea 100644
--- a/sound/soc/intel/skylake/skl-pcm.c
+++ b/sound/soc/intel/skylake/skl-pcm.c
@@ -500,11 +500,10 @@ static int skl_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
 		 */
 		ret = skl_decoupled_trigger(substream, cmd);
 		if (ret < 0)
 			return ret;
 		return skl_run_pipe(skl, mconfig->pipe);
-		break;
 
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_STOP:
 		/*
diff --git a/sound/soc/ti/davinci-mcasp.c b/sound/soc/ti/davinci-mcasp.c
index a6b72ad53b43..2d85cc4c67fb 100644
--- a/sound/soc/ti/davinci-mcasp.c
+++ b/sound/soc/ti/davinci-mcasp.c
@@ -2383,11 +2383,10 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
 		break;
 	default:
 		dev_err(&pdev->dev, "No DMA controller found (%d)\n", ret);
 	case -EPROBE_DEFER:
 		goto err;
-		break;
 	}
 
 	if (ret) {
 		dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
 		goto err;


^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-17 16:09 [RFC] treewide: cleanup unreachable breaks trix
@ 2020-10-17 16:24 ` Martin Blumenstingl
  2020-10-17 16:24 ` Joe Perches
                   ` (4 subsequent siblings)
  5 siblings, 0 replies; 20+ messages in thread
From: Martin Blumenstingl @ 2020-10-17 16:24 UTC (permalink / raw)
  To: trix; +Cc: linux-kernel, linux-iio, linux-amlogic, linux-arm-kernel

Hi Tom,

(I removed what I believe are irrelevant recipients from this reply)

On Sat, Oct 17, 2020 at 6:10 PM <trix@redhat.com> wrote:
[...]
> diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
> index e03988698755..66dc452d643a 100644
> --- a/drivers/iio/adc/meson_saradc.c
> +++ b/drivers/iio/adc/meson_saradc.c
> @@ -591,17 +591,15 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
>
>         switch (mask) {
>         case IIO_CHAN_INFO_RAW:
>                 return meson_sar_adc_get_sample(indio_dev, chan, NO_AVERAGING,
>                                                 ONE_SAMPLE, val);
> -               break;
>
>         case IIO_CHAN_INFO_AVERAGE_RAW:
>                 return meson_sar_adc_get_sample(indio_dev, chan,
>                                                 MEAN_AVERAGING, EIGHT_SAMPLES,
>                                                 val);
> -               break;
>
>         case IIO_CHAN_INFO_SCALE:
>                 if (chan->type == IIO_VOLTAGE) {
>                         ret = regulator_get_voltage(priv->vref);
>                         if (ret < 0) {
for drivers/iio/adc/meson_saradc.c:
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>


Best regards,
Martin

^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-17 16:09 [RFC] treewide: cleanup unreachable breaks trix
  2020-10-17 16:24 ` Martin Blumenstingl
@ 2020-10-17 16:24 ` Joe Perches
  2020-10-17 18:21   ` [Cocci] " Julia Lawall
  2020-10-17 21:01 ` Dan Williams
                   ` (3 subsequent siblings)
  5 siblings, 1 reply; 20+ messages in thread
From: Joe Perches @ 2020-10-17 16:24 UTC (permalink / raw)
  To: trix, linux-kernel, cocci
  Cc: linux-edac, linux-acpi, linux-pm, xen-devel, linux-block,
	openipmi-developer, linux-crypto, linux-arm-kernel, linux-power,
	linux-gpio, amd-gfx, dri-devel, nouveau, virtualization,
	spice-devel, linux-iio, linux-amlogic, industrypack-devel,
	linux-media, MPT-FusionLinux.pdl, linux-scsi, linux-mtd,
	linux-can, netdev, intel-wired-lan, ath10k, linux-wireless,
	linux-stm32, linux-nfc, linux-nvdimm, linux-pci,
	linux-samsung-soc, platform-driver-x86, patches, storagedev,
	devel, linux-serial, linux-usb, usb-storage, linux-watchdog,
	ocfs2-devel, bpf, linux-integrity, linux-security-module,
	keyrings, alsa-devel, clang-built-linux

On Sat, 2020-10-17 at 09:09 -0700, trix@redhat.com wrote:
> From: Tom Rix <trix@redhat.com>
> 
> This is a upcoming change to clean up a new warning treewide.
> I am wondering if the change could be one mega patch (see below) or
> normal patch per file about 100 patches or somewhere half way by collecting
> early acks.
> 
> clang has a number of useful, new warnings see
> https://clang.llvm.org/docs/DiagnosticsReference.html
> 
> This change cleans up -Wunreachable-code-break
> https://clang.llvm.org/docs/DiagnosticsReference.html#wunreachable-code-break
> for 266 of 485 warnings in this week's linux-next, allyesconfig on x86_64.

Early acks/individual patches by subsystem would be good.
Better still would be an automated cocci script.

The existing checkpatch test for UNNECESSARY_BREAK
has a few too many false positives.

From a script run on next on July 28th:

arch/arm/mach-s3c24xx/mach-rx1950.c:266: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/arm/nwfpe/fpa11_cprt.c:38: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/arm/nwfpe/fpa11_cprt.c:41: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/include/asm/mach-au1x00/au1000.h:684: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/include/asm/mach-au1x00/au1000.h:687: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/include/asm/mach-au1x00/au1000.h:690: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/include/asm/mach-au1x00/au1000.h:693: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/include/asm/mach-au1x00/au1000.h:697: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/include/asm/mach-au1x00/au1000.h:700: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/loongson2ef/common/cs5536/cs5536_isa.c:276: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/loongson2ef/common/cs5536/cs5536_isa.c:279: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/loongson2ef/common/cs5536/cs5536_isa.c:282: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/loongson2ef/common/cs5536/cs5536_isa.c:287: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/loongson2ef/common/cs5536/cs5536_isa.c:290: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/rb532/setup.c:76: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/mips/rb532/setup.c:79: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/powerpc/include/asm/kvm_book3s_64.h:231: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/powerpc/include/asm/kvm_book3s_64.h:234: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/powerpc/include/asm/kvm_book3s_64.h:237: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/powerpc/include/asm/kvm_book3s_64.h:240: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/powerpc/net/bpf_jit_comp.c:455: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/powerpc/platforms/cell/spufs/switch.c:2047: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/powerpc/platforms/cell/spufs/switch.c:2077: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/sh/boards/mach-landisk/gio.c:111: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/x86/kernel/cpu/mce/core.c:1734: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/x86/kernel/cpu/mce/core.c:1738: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
arch/x86/kernel/cpu/microcode/amd.c:218: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/acpi/utils.c:107: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/acpi/utils.c:132: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/acpi/utils.c:147: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/acpi/utils.c:158: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/ata/libata-scsi.c:3973: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/base/power/main.c:366: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/block/xen-blkback/blkback.c:1272: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/char/ipmi/ipmi_devintf.c:493: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/char/lp.c:625: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/char/mwave/mwavedd.c:406: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/cpufreq/e_powersaver.c:226: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/cpufreq/longhaul.c:596: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/crypto/atmel-sha.c:462: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/edac/amd64_edac.c:2464: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/edac/amd64_edac.c:2468: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/edac/amd64_edac.c:2471: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/edac/amd64_edac.c:2481: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/edac/amd64_edac.c:2485: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/edac/amd64_edac.c:2488: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/edac/amd64_edac.c:2491: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/amd/amdgpu/atombios_encoders.c:505: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/amd/amdgpu/atombios_encoders.c:528: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/amd/amdgpu/dce_v10_0.c:2220: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/amd/amdgpu/dce_v11_0.c:2253: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/amd/amdgpu/dce_v8_0.c:2110: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/gma500/cdv_intel_hdmi.c:346: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/mgag200/mgag200_mode.c:723: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/mgag200/mgag200_mode.c:727: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/mgag200/mgag200_mode.c:730: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/mgag200/mgag200_mode.c:734: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/mgag200/mgag200_mode.c:737: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c:126: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c:143: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c:150: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c:153: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c:174: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/qxl/qxl_ioctl.c:163: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/radeon/atombios_encoders.c:749: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/radeon/atombios_encoders.c:780: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/radeon/r300.c:1160: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/gpu/drm/radeon/radeon_i2c.c:462: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/infiniband/hw/cxgb4/qp.c:1972: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/infiniband/hw/cxgb4/qp.c:2021: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/infiniband/hw/cxgb4/qp.c:2026: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/input/mouse/synaptics_usb.c:207: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/ipack/devices/ipoctal.c:547: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/irqchip/irq-crossbar.c:291: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/irqchip/irq-mips-gic.c:643: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/isdn/mISDN/dsp_dtmf.c:174: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/macintosh/via-pmu-led.c:65: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/cx24117.c:1175: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/dib0090.c:407: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/dib0090.c:497: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/drxd_hard.c:1625: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/drx39xyj/drxj.c:2328: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/drx39xyj/drxj.c:2655: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/drx39xyj/drxj.c:3597: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/drx39xyj/drxj.c:3621: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/drx39xyj/drxj.c:3645: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/drx39xyj/drxj.c:10947: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/drx39xyj/drxj.c:11068: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/drx39xyj/drxj.c:11890: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:171: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:193: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:219: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:242: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:245: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:377: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:558: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:583: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:597: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:613: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:629: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:641: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:667: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:723: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:745: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/nxt200x.c:1117: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/si21xx.c:467: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/si21xx.c:470: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/dvb-frontends/stv0900_core.c:1948: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/tuners/mt2063.c:1852: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/b2c2/flexcop-usb.c:198: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/b2c2/flexcop-usb.c:521: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/gspca/pac_common.h:105: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/pwc/pwc-if.c:860: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/pwc/pwc-if.c:872: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/pwc/pwc-if.c:931: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/pwc/pwc-if.c:957: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/pwc/pwc-if.c:976: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/pwc/pwc-if.c:988: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/pwc/pwc-if.c:1001: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/pwc/pwc-if.c:1019: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/tm6000/tm6000-core.c:674: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/tm6000/tm6000-core.c:696: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/tm6000/tm6000-core.c:761: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/ttusb-dec/ttusb_dec.c:1105: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/ttusb-dec/ttusb_dec.c:1109: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/ttusb-dec/ttusb_dec.c:1160: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/media/usb/ttusb-dec/ttusb_dec.c:1164: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/message/fusion/mptbase.c:476: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/misc/mei/hbm.c:1307: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/mmc/host/atmel-mci.c:1919: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/mtd/devices/ms02-nv.c:289: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/mtd/mtdchar.c:884: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/mtd/mtdchar.c:894: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/net/ethernet/8390/mac8390.c:193: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/net/ethernet/8390/mac8390.c:206: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/net/ethernet/cisco/enic/enic_ethtool.c:437: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c:353: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/net/wireless/ath/ath9k/hw.c:2311: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/net/wireless/realtek/rtlwifi/rtl8188ee/hw.c:1230: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/net/wireless/realtek/rtlwifi/rtl8723ae/hw.c:1135: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/nfc/trf7970a.c:1385: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/nvdimm/claim.c:205: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/parport/parport_ip32.c:1862: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pci/controller/pci-v3-semi.c:664: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pci/hotplug/ibmphp_pci.c:297: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pci/hotplug/ibmphp_pci.c:1512: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pinctrl/pinctrl-rockchip.c:2718: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pinctrl/pinctrl-rockchip.c:2788: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pinctrl/samsung/pinctrl-s3c24xx.c:111: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pinctrl/samsung/pinctrl-s3c24xx.c:114: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pinctrl/samsung/pinctrl-s3c24xx.c:117: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pinctrl/samsung/pinctrl-s3c24xx.c:120: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pinctrl/samsung/pinctrl-s3c24xx.c:123: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/platform/x86/acer-wmi.c:795: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/platform/x86/sony-laptop.c:2470: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/platform/x86/sony-laptop.c:2476: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/platform/x86/wmi.c:1263: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/platform/x86/wmi.c:1266: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/platform/x86/wmi.c:1269: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pnp/pnpbios/rsparser.c:192: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pnp/pnpbios/rsparser.c:476: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/pnp/pnpbios/rsparser.c:745: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/power/supply/ipaq_micro_battery.c:98: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/power/supply/ipaq_micro_battery.c:101: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/power/supply/ipaq_micro_battery.c:104: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/power/supply/wm831x_power.c:671: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/s390/char/tape_34xx.c:654: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/s390/char/tape_3590.c:946: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/s390/scsi/zfcp_fc.c:980: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/s390/scsi/zfcp_fc.c:983: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/aic94xx/aic94xx_task.c:272: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/arcmsr/arcmsr_hba.c:2702: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/arcmsr/arcmsr_hba.c:2705: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/be2iscsi/be_mgmt.c:1251: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/be2iscsi/be_mgmt.c:1254: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/bfa/bfa_ioc.h:1001: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/bfa/bfa_ioc.h:1004: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/bfa/bfa_ioc.h:1007: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/bfa/bfa_ioc.h:1019: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/bfa/bfa_ioc.h:1022: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/bfa/bfa_ioc.h:1025: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/bnx2fc/bnx2fc_hwi.c:773: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/fcoe/fcoe.c:1897: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/hptiop.c:761: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/hpsa.c:7443: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/isci/phy.c:756: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/isci/phy.c:961: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/ipr.c:9490: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_debugfs.c:3347: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_debugfs.c:4387: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_debugfs.c:4439: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_debugfs.c:4453: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_debugfs.c:4495: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_debugfs.c:4520: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_debugfs.c:4523: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_scsi.c:4287: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_init.c:7189: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_sli.c:9192: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_sli.c:10075: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/lpfc/lpfc_sli.c:10237: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/mvumi.c:2299: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/nsp32.c:2114: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/nsp32.c:2125: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/qla2xxx/qla_mbx.c:4026: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/st.c:2849: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/scsi/sym53c8xx_2/sym_hipd.c:4599: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:907: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:910: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:913: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:916: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:998: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:1035: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:1322: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:1699: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:1702: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:1705: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c:1708: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/tty/nozomi.c:417: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/tty/nozomi.c:421: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/tty/nozomi.c:463: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/tty/nozomi.c:471: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/tty/serial/imx.c:323: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/tty/serial/imx.c:334: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/tty/serial/imx.c:337: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/tty/serial/imx.c:340: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/tty/serial/imx.c:343: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/gadget/function/f_hid.c:516: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/gadget/function/f_hid.c:524: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/gadget/function/f_hid.c:530: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/gadget/function/f_hid.c:547: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/gadget/function/f_hid.c:565: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/gadget/function/f_hid.c:573: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/gadget/function/f_hid.c:579: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/gadget/function/f_hid.c:587: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/host/xhci-mem.c:1147: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/image/microtek.c:294: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/misc/iowarrior.c:387: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/misc/iowarrior.c:457: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/misc/iowarrior.c:464: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/misc/usblcd.c:190: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/serial/iuu_phoenix.c:853: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/serial/iuu_phoenix.c:867: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/usb/storage/freecom.c:434: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/video/fbdev/amifb.c:1212: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/video/fbdev/core/fbcon.c:1915: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/video/fbdev/core/fbcon.c:2006: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_ca91cx42.c:372: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_ca91cx42.c:681: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_ca91cx42.c:713: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_ca91cx42.c:1126: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_ca91cx42.c:1338: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_tsi148.c:509: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_tsi148.c:998: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_tsi148.c:1506: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_tsi148.c:1606: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_tsi148.c:1704: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_tsi148.c:1741: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/bridges/vme_tsi148.c:1967: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/vme.c:71: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/vme.c:182: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/vme.c:190: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/vme.c:193: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
drivers/vme/vme.c:197: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
fs/efs/inode.c:166: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
fs/ocfs2/cluster/tcp.c:1201: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
kernel/bpf/syscall.c:2786: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
samples/hidraw/hid-example.c:168: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
samples/hidraw/hid-example.c:171: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
samples/hidraw/hid-example.c:174: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
samples/hidraw/hid-example.c:177: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
samples/hidraw/hid-example.c:180: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
security/integrity/ima/ima_appraise.c:173: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
security/keys/trusted-keys/trusted_tpm1.c:904: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/oss/dmasound/dmasound_core.c:1002: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/oss/dmasound/dmasound_core.c:1006: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/oss/dmasound/dmasound_core.c:1023: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/oss/dmasound/dmasound_core.c:1047: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/oss/dmasound/dmasound_core.c:1126: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/oss/dmasound/dmasound_core.c:1261: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/echoaudio/midi.c:100: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/echoaudio/midi.c:104: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme32.c:471: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/rme9652.c:735: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/rme9652.c:739: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/rme9652.c:743: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/rme9652.c:747: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/rme9652.c:751: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/rme9652.c:755: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/rme9652.c:762: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/hdspm.c:2289: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/hdspm.c:2315: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/hdspm.c:2341: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/hdspm.c:2361: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/hdspm.c:3848: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/pci/rme9652/hdspm.c:3859: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/soc/codecs/wl1273.c:314: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/soc/intel/skylake/skl-pcm.c:505: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/soc/sh/hac.c:254: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
sound/soc/ti/davinci-mcasp.c:2388: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
tools/perf/ui/stdio/hist.c:401: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
tools/perf/ui/stdio/hist.c:404: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
tools/perf/util/probe-event.c:1516: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
tools/power/acpi/tools/acpidbg/acpidbg.c:412: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return
tools/power/acpi/tools/acpidbg/acpidbg.c:418: WARNING:UNNECESSARY_BREAK: break is not useful after a goto or return



^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [Cocci] [RFC] treewide: cleanup unreachable breaks
  2020-10-17 16:24 ` Joe Perches
@ 2020-10-17 18:21   ` Julia Lawall
  2020-10-17 19:00     ` Joe Perches
  0 siblings, 1 reply; 20+ messages in thread
From: Julia Lawall @ 2020-10-17 18:21 UTC (permalink / raw)
  To: Joe Perches
  Cc: trix, linux-kernel, cocci, alsa-devel, clang-built-linux,
	linux-iio, nouveau, storagedev, dri-devel, virtualization,
	keyrings, linux-mtd, ath10k, linux-stm32, usb-storage,
	linux-watchdog, devel, linux-samsung-soc, linux-scsi,
	linux-nvdimm, amd-gfx, linux-acpi, intel-wired-lan,
	industrypack-devel, linux-pci, spice-devel, MPT-FusionLinux.pdl,
	linux-media, linux-serial, linux-nfc, linux-pm, linux-can,
	linux-block, linux-gpio, xen-devel, linux-amlogic,
	openipmi-developer, platform-driver-x86, linux-integrity,
	linux-arm-kernel, linux-edac, netdev, linux-usb, linux-wireless,
	linux-security-module, linux-crypto, patches, bpf, ocfs2-devel,
	linux-power



On Sat, 17 Oct 2020, Joe Perches wrote:

> On Sat, 2020-10-17 at 09:09 -0700, trix@redhat.com wrote:
> > From: Tom Rix <trix@redhat.com>
> >
> > This is a upcoming change to clean up a new warning treewide.
> > I am wondering if the change could be one mega patch (see below) or
> > normal patch per file about 100 patches or somewhere half way by collecting
> > early acks.
> >
> > clang has a number of useful, new warnings see
> > https://clang.llvm.org/docs/DiagnosticsReference.html
> >
> > This change cleans up -Wunreachable-code-break
> > https://clang.llvm.org/docs/DiagnosticsReference.html#wunreachable-code-break
> > for 266 of 485 warnings in this week's linux-next, allyesconfig on x86_64.
>
> Early acks/individual patches by subsystem would be good.
> Better still would be an automated cocci script.

Coccinelle is not especially good at this, because it is based on control
flow, and a return or goto diverts the control flow away from the break.
A hack to solve the problem is to put an if around the return or goto, but
that gives the break a meaningless file name and line number.  I collected
the following list, but it only has 439 results, so fewer than clang.  But
maybe there are some files that are not considered by clang in the x86
allyesconfig configuration.

Probably checkpatch is the best solution here, since it is not
configuration sensitive and doesn't care about control flow.

julia

drivers/scsi/mvumi.c: function mvumi_cfg_hw_reg line 114
drivers/watchdog/geodewdt.c: function geodewdt_ioctl line 18
drivers/media/usb/b2c2/flexcop-usb.c: function flexcop_usb_init line 21
drivers/media/usb/b2c2/flexcop-usb.c: function flexcop_usb_memory_req line 20
drivers/tty/nozomi.c: function write_mem32 line 17
drivers/tty/nozomi.c: function write_mem32 line 25
drivers/tty/nozomi.c: function read_mem32 line 17
drivers/tty/nozomi.c: function read_mem32 line 21
sound/soc/codecs/wl1273.c: function wl1273_startup line 27
drivers/iio/adc/meson_saradc.c: function meson_sar_adc_iio_info_read_raw line 12
drivers/iio/adc/meson_saradc.c: function meson_sar_adc_iio_info_read_raw line 19
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c: function map_transmitter_id_to_phy_instance line 6
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c: function map_transmitter_id_to_phy_instance line 9
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c: function map_transmitter_id_to_phy_instance line 12
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c: function map_transmitter_id_to_phy_instance line 15
drivers/media/tuners/mt2063.c: function mt2063_init line 81
drivers/nfc/st21nfca/core.c: function st21nfca_hci_im_transceive line 46
arch/sh/boards/mach-landisk/gio.c: function gio_ioctl line 53
drivers/gpu/drm/mgag200/mgag200_mode.c: function mgag200_crtc_set_plls line 11
drivers/gpu/drm/mgag200/mgag200_mode.c: function mgag200_crtc_set_plls line 15
drivers/gpu/drm/mgag200/mgag200_mode.c: function mgag200_crtc_set_plls line 18
drivers/gpu/drm/mgag200/mgag200_mode.c: function mgag200_crtc_set_plls line 22
drivers/gpu/drm/mgag200/mgag200_mode.c: function mgag200_crtc_set_plls line 25
drivers/media/dvb-frontends/cx24117.c: function cx24117_attach line 16
drivers/block/xen-blkback/blkback.c: function dispatch_rw_block_io line 48
drivers/platform/x86/sony-laptop.c: function __sony_nc_gfx_switch_status_get line 16
drivers/platform/x86/sony-laptop.c: function __sony_nc_gfx_switch_status_get line 22
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drivers/macintosh/via-pmu-led.c: function pmu_led_set line 15
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drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c: function map_transmitter_id_to_phy_instance line 9
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drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c: function map_transmitter_id_to_phy_instance line 15
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drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c: function map_transmitter_id_to_phy_instance line 21
drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c: function map_transmitter_id_to_phy_instance line 24
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drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c: function map_transmitter_id_to_phy_instance line 24
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drivers/gpu/drm/qxl/qxl_ioctl.c: function qxl_process_single_command line 21
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drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c: function map_transmitter_id_to_phy_instance line 9
drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c: function map_transmitter_id_to_phy_instance line 12
drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c: function map_transmitter_id_to_phy_instance line 15
drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c: function map_transmitter_id_to_phy_instance line 18
drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c: function map_transmitter_id_to_phy_instance line 21
drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c: function map_transmitter_id_to_phy_instance line 24
drivers/net/wireless/ath/ath10k/htt_rx.c: function ath10k_htt_t2h_msg_handler line 119
drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c: function pll_map line 11
drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c: function nv50_ram_timing_read line 24
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drivers/gpu/drm/amd/amdgpu/dce_v11_0.c: function dce_v11_0_pick_dig_encoder line 32
drivers/media/usb/go7007/go7007-usb.c: function go7007_usb_probe line 58
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drivers/net/wireless/ath/ath6kl/testmode.c: function ath6kl_tm_cmd line 31
drivers/misc/mei/hbm.c: function mei_hbm_dispatch line 277
drivers/scsi/hptiop.c: function hptiop_finish_scsi_req line 45
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drivers/base/power/main.c: function pm_op line 18
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drivers/pci/hotplug/ibmphp_pci.c: function unconfigure_boot_card line 96
drivers/scsi/fcoe/fcoe.c: function fcoe_device_notification line 54
drivers/scsi/lpfc/lpfc_sli.c: function lpfc_mbox_api_table_setup line 26
drivers/scsi/lpfc/lpfc_sli.c: function lpfc_sli_api_table_setup line 18
drivers/scsi/lpfc/lpfc_sli.c: function lpfc_sli4_iocb2wqe line 567
drivers/media/dvb-frontends/drxd_hard.c: function CorrectSysClockDeviation line 43
tools/perf/util/probe-event.c: function parse_perf_probe_point line 174
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drivers/scsi/bfa/bfa_ioc.h: function bfa_cb_image_get_chunk line 9
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drivers/scsi/bfa/bfa_ioc.h: function bfa_cb_image_get_size line 9
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drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c: function map_transmitter_id_to_phy_instance line 6
drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c: function map_transmitter_id_to_phy_instance line 9
drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c: function map_transmitter_id_to_phy_instance line 12
drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c: function map_transmitter_id_to_phy_instance line 15
drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c: function map_transmitter_id_to_phy_instance line 18
drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c: function map_transmitter_id_to_phy_instance line 21
drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c: function map_transmitter_id_to_phy_instance line 24
drivers/net/wireless/realtek/rtlwifi/rtl8188ee/hw.c: function _rtl88ee_set_media_status line 35
sound/oss/dmasound/dmasound_core.c: function sq_ioctl line 12
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drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c: function map_transmitter_id_to_phy_instance line 9
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drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c: function map_transmitter_id_to_phy_instance line 18
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drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c: function map_transmitter_id_to_phy_instance line 24
drivers/media/usb/ttusb-dec/ttusb_dec.c: function ttusb_dec_start_feed line 16
drivers/media/usb/ttusb-dec/ttusb_dec.c: function ttusb_dec_start_feed line 20
drivers/media/usb/ttusb-dec/ttusb_dec.c: function ttusb_dec_stop_feed line 7
drivers/media/usb/ttusb-dec/ttusb_dec.c: function ttusb_dec_stop_feed line 11
drivers/net/ethernet/cisco/enic/enic_ethtool.c: function enic_grxclsrule line 19
security/integrity/ima/ima_appraise.c: function ima_get_hash_algo line 18
sound/pci/rme9652/hdspm.c: function hdspm_get_aes_sample_rate line 8
sound/pci/rme9652/hdspm.c: function hdspm_wc_sync_check line 16
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sound/pci/rme9652/hdspm.c: function hdspm_wc_sync_check line 43
sound/pci/rme9652/hdspm.c: function hdspm_get_tco_sample_rate line 10
sound/pci/rme9652/hdspm.c: function hdspm_get_sync_in_sample_rate line 10
sound/pci/rme9652/hdspm.c: function hdspm_get_wc_sample_rate line 9
drivers/nfc/trf7970a.c: function trf7970a_is_iso15693_write_or_lock line 11
drivers/media/usb/gspca/pac_common.h: function pac_find_sof line 45
drivers/net/ethernet/aquantia/atlantic/aq_nic.c: function aq_nic_set_link_ksettings line 46
drivers/scsi/lpfc/lpfc_scsi.c: function lpfc_scsi_api_table_setup line 25
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_readreg_multibyte line 18
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_readreg_multibyte line 41
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_readreg_multibyte line 44
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_writereg_multibyte line 30
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_writereg_multibyte line 54
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_setup_frontend_parameters line 33
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_setup_frontend_parameters line 58
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_setup_frontend_parameters line 72
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_setup_frontend_parameters line 88
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_setup_frontend_parameters line 104
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_setup_frontend_parameters line 116
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_setup_frontend_parameters line 142
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_setup_frontend_parameters line 198
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_setup_frontend_parameters line 220
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_init line 15
drivers/media/dvb-frontends/nxt200x.c: function nxt200x_writetuner line 57
drivers/tty/serial/imx.c: function imx_uart_readl line 5
drivers/tty/serial/imx.c: function imx_uart_readl line 16
drivers/tty/serial/imx.c: function imx_uart_readl line 19
drivers/tty/serial/imx.c: function imx_uart_readl line 22
drivers/tty/serial/imx.c: function imx_uart_readl line 25
drivers/crypto/atmel-sha.c: function atmel_sha_init line 37
drivers/edac/amd64_edac.c: function map_err_sym_to_channel line 7
drivers/edac/amd64_edac.c: function map_err_sym_to_channel line 11
drivers/edac/amd64_edac.c: function map_err_sym_to_channel line 14
drivers/edac/amd64_edac.c: function map_err_sym_to_channel line 24
drivers/edac/amd64_edac.c: function map_err_sym_to_channel line 28
drivers/edac/amd64_edac.c: function map_err_sym_to_channel line 31
drivers/edac/amd64_edac.c: function map_err_sym_to_channel line 34
drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c: function map_transmitter_id_to_phy_instance line 6
drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c: function map_transmitter_id_to_phy_instance line 9
drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c: function map_transmitter_id_to_phy_instance line 12
drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c: function map_transmitter_id_to_phy_instance line 15
drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c: function map_transmitter_id_to_phy_instance line 18
drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c: function map_transmitter_id_to_phy_instance line 21
drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c: function map_transmitter_id_to_phy_instance line 24
drivers/scsi/st.c: function st_int_ioctl line 155
drivers/infiniband/hw/cxgb4/qp.c: function c4iw_modify_qp line 146
drivers/infiniband/hw/cxgb4/qp.c: function c4iw_modify_qp line 195
drivers/infiniband/hw/cxgb4/qp.c: function c4iw_modify_qp line 200
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function mcp251xfd_get_mode_str line 4
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function mcp251xfd_get_mode_str line 6
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function mcp251xfd_get_mode_str line 8
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function mcp251xfd_get_mode_str line 10
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function mcp251xfd_get_mode_str line 12
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function mcp251xfd_get_mode_str line 14
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function mcp251xfd_get_mode_str line 16
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function mcp251xfd_get_mode_str line 18
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function __mcp251xfd_get_model_str line 4
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function __mcp251xfd_get_model_str line 6
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c: function __mcp251xfd_get_model_str line 8
drivers/ata/libata-scsi.c: function ata_get_xlat_func line 35
drivers/char/ipmi/ipmi_devintf.c: function ipmi_ioctl line 201
arch/arm/nwfpe/fpa11_cprt.c: function EmulateCPRT line 15
arch/arm/nwfpe/fpa11_cprt.c: function EmulateCPRT line 18
drivers/vme/bridges/vme_ca91cx42.c: function ca91cx42_dma_list_add line 108
drivers/vme/bridges/vme_ca91cx42.c: function ca91cx42_master_set line 92
drivers/vme/bridges/vme_ca91cx42.c: function ca91cx42_master_set line 124
drivers/vme/bridges/vme_ca91cx42.c: function ca91cx42_slave_set line 39
drivers/vme/bridges/vme_ca91cx42.c: function ca91cx42_lm_set line 45
drivers/scsi/sym53c8xx_2/sym_hipd.c: function sym_int_sir line 230
drivers/gpu/drm/radeon/r300.c: function r300_packet0_check line 534
drivers/gpu/drm/amd/amdgpu/atombios_encoders.c: function amdgpu_atombios_encoder_get_encoder_mode line 70
drivers/gpu/drm/amd/amdgpu/atombios_encoders.c: function amdgpu_atombios_encoder_get_encoder_mode line 96
drivers/gpu/drm/amd/amdgpu/atombios_encoders.c: function amdgpu_atombios_encoder_get_encoder_mode line 103
drivers/media/dvb-frontends/si21xx.c: function si21xx_set_voltage line 15
drivers/media/dvb-frontends/si21xx.c: function si21xx_set_voltage line 18
drivers/staging/vme/devices/vme_user.c: function vme_user_ioctl line 75
drivers/staging/vme/devices/vme_user.c: function vme_user_ioctl line 119
drivers/mmc/host/atmel-mci.c: function atmci_tasklet_func line 197
drivers/irqchip/irq-mips-gic.c: function gic_ipi_domain_match line 9
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function input_buffer_configuration line 47
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function input_buffer_configuration line 84
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function input_system_configure_channel line 14
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function input_system_configure_channel line 17
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function input_system_configure_channel line 20
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function input_system_configure_channel line 23
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function configuration_to_registers line 83
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function input_system_configure_channel_sensor line 82
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function input_system_configure_channel_sensor line 85
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function input_system_configure_channel_sensor line 88
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/input_system.c: function input_system_configure_channel_sensor line 91
drivers/net/ethernet/8390/mac8390.c: function mac8390_ident line 27
drivers/net/ethernet/8390/mac8390.c: function mac8390_ident line 42
drivers/irqchip/irq-crossbar.c: function crossbar_of_init line 100
drivers/mtd/devices/ms02-nv.c: function ms02nv_init line 21
arch/powerpc/platforms/cell/spufs/switch.c: function __do_spu_restore line 21
arch/powerpc/platforms/cell/spufs/switch.c: function __do_spu_save line 23
arch/powerpc/include/asm/kvm_book3s_64.h: function kvmppc_hpte_page_shifts line 11
arch/powerpc/include/asm/kvm_book3s_64.h: function kvmppc_hpte_page_shifts line 14
arch/powerpc/include/asm/kvm_book3s_64.h: function kvmppc_hpte_page_shifts line 17
arch/powerpc/include/asm/kvm_book3s_64.h: function kvmppc_hpte_page_shifts line 20
arch/x86/kernel/cpu/mce/core.c: function __mcheck_cpu_ancient_init line 10
arch/x86/kernel/cpu/mce/core.c: function __mcheck_cpu_ancient_init line 14
sound/pci/echoaudio/midi.c: function mtc_process_data line 10
sound/pci/echoaudio/midi.c: function mtc_process_data line 14
sound/pci/rme32.c: function snd_rme32_capture_getrate line 36
tools/power/acpi/tools/acpidbg/acpidbg.c: function main line 33
tools/power/acpi/tools/acpidbg/acpidbg.c: function main line 39
drivers/scsi/lpfc/lpfc_init.c: function lpfc_init_api_table_setup line 22
drivers/gpu/drm/amd/amdgpu/dce_v10_0.c: function dce_v10_0_pick_dig_encoder line 32
drivers/acpi/utils.c: function acpi_extract_package line 66
drivers/acpi/utils.c: function acpi_extract_package line 91
drivers/acpi/utils.c: function acpi_extract_package line 106
drivers/acpi/utils.c: function acpi_extract_package line 117
drivers/char/lp.c: function lp_do_ioctl line 48
drivers/mtd/mtdchar.c: function mtdchar_ioctl line 265
drivers/mtd/mtdchar.c: function mtdchar_ioctl line 276
arch/x86/kvm/emulate.c: function writeback line 26
drivers/usb/host/xhci-mem.c: function xhci_setup_addressable_virt_dev line 46
drivers/media/usb/tm6000/tm6000-core.c: function tm6000_set_audio_rinput line 26
drivers/media/usb/tm6000/tm6000-core.c: function tm6000_set_audio_rinput line 48
drivers/media/usb/tm6000/tm6000-core.c: function tm6000_tvaudio_set_mute line 26
drivers/media/dvb-frontends/dib0090.c: function dib0090_fw_identify line 79
drivers/media/dvb-frontends/dib0090.c: function dib0090_identify line 81
drivers/net/dsa/b53/b53_common.c: function b53_switch_init line 46
drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c: function iwl_mvm_mac_ctx_send line 9
drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c: function map_transmitter_id_to_phy_instance line 6
drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c: function map_transmitter_id_to_phy_instance line 9
drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c: function map_transmitter_id_to_phy_instance line 12
drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c: function map_transmitter_id_to_phy_instance line 15
drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c: function map_transmitter_id_to_phy_instance line 18
sound/soc/sh/hac.c: function hac_hw_params line 19
drivers/gpu/drm/radeon/atombios_encoders.c: function atombios_get_encoder_mode line 83
drivers/gpu/drm/radeon/atombios_encoders.c: function atombios_get_encoder_mode line 119
drivers/gpu/drm/radeon/atombios_encoders.c: function atombios_get_encoder_mode line 126
drivers/pci/controller/pci-v3-semi.c: function v3_get_dma_range_config line 64
drivers/video/fbdev/amifb.c: function amifb_probe line 90
drivers/video/fbdev/amifb.c: function ami_decode_var line 84
fs/efs/inode.c: function efs_iget line 120
drivers/vme/bridges/vme_tsi148.c: function tsi148_dma_list_add line 81
drivers/vme/bridges/vme_tsi148.c: function tsi148_dma_list_add line 119
drivers/vme/bridges/vme_tsi148.c: function tsi148_master_set line 191
drivers/vme/bridges/vme_tsi148.c: function tsi148_slave_set line 38
drivers/vme/bridges/vme_tsi148.c: function tsi148_dma_set_vme_dest_attributes line 87
drivers/vme/bridges/vme_tsi148.c: function tsi148_dma_set_vme_src_attributes line 87
drivers/vme/bridges/vme_tsi148.c: function tsi148_lm_set line 41
net/ipv4/fib_frontend.c: function fib_gw_from_via line 35
arch/arm/mach-s3c/mach-rx1950.c: function rx1950_led_blink_set line 17
tools/perf/ui/stdio/hist.c: function hist_entry_callchain__fprintf line 15
tools/perf/ui/stdio/hist.c: function hist_entry_callchain__fprintf line 21
tools/perf/ui/stdio/hist.c: function hist_entry_callchain__fprintf line 24
tools/perf/ui/stdio/hist.c: function hist_entry_callchain__fprintf line 27
drivers/usb/serial/iuu_phoenix.c: function iuu_uart_baud line 74
drivers/usb/serial/iuu_phoenix.c: function iuu_uart_baud line 88
drivers/gpu/drm/amd/amdgpu/dce_v8_0.c: function dce_v8_0_pick_dig_encoder line 32
drivers/net/hyperv/netvsc.c: function netvsc_process_raw_pkt line 19
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c: function map_transmitter_id_to_phy_instance line 6
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c: function map_transmitter_id_to_phy_instance line 9
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c: function map_transmitter_id_to_phy_instance line 12
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c: function map_transmitter_id_to_phy_instance line 15
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c: function map_transmitter_id_to_phy_instance line 18
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c: function map_transmitter_id_to_phy_instance line 21
drivers/cpufreq/e_powersaver.c: function eps_cpu_init line 55

^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [Cocci] [RFC] treewide: cleanup unreachable breaks
  2020-10-17 18:21   ` [Cocci] " Julia Lawall
@ 2020-10-17 19:00     ` Joe Perches
  0 siblings, 0 replies; 20+ messages in thread
From: Joe Perches @ 2020-10-17 19:00 UTC (permalink / raw)
  To: Julia Lawall
  Cc: trix, linux-kernel, cocci, alsa-devel, clang-built-linux,
	linux-iio, nouveau, storagedev, dri-devel, virtualization,
	keyrings, linux-mtd, ath10k, linux-stm32, usb-storage,
	linux-watchdog, devel, linux-samsung-soc, linux-scsi,
	linux-nvdimm, amd-gfx, linux-acpi, intel-wired-lan,
	industrypack-devel, linux-pci, spice-devel, MPT-FusionLinux.pdl,
	linux-media, linux-serial, linux-nfc, linux-pm, linux-can,
	linux-block, linux-gpio, xen-devel, linux-amlogic,
	openipmi-developer, platform-driver-x86, linux-integrity,
	linux-arm-kernel, linux-edac, netdev, linux-usb, linux-wireless,
	linux-security-module, linux-crypto, patches, bpf, ocfs2-devel,
	linux-power

On Sat, 2020-10-17 at 20:21 +0200, Julia Lawall wrote:
> On Sat, 17 Oct 2020, Joe Perches wrote:
> > On Sat, 2020-10-17 at 09:09 -0700, trix@redhat.com wrote:
> > > From: Tom Rix <trix@redhat.com>
> > > 
> > > This is a upcoming change to clean up a new warning treewide.
> > > I am wondering if the change could be one mega patch (see below) or
> > > normal patch per file about 100 patches or somewhere half way by collecting
> > > early acks.
> > > 
> > > clang has a number of useful, new warnings see
> > > https://clang.llvm.org/docs/DiagnosticsReference.html
> > > 
> > > This change cleans up -Wunreachable-code-break
> > > https://clang.llvm.org/docs/DiagnosticsReference.html#wunreachable-code-break
> > > for 266 of 485 warnings in this week's linux-next, allyesconfig on x86_64.
> > 
> > Early acks/individual patches by subsystem would be good.
> > Better still would be an automated cocci script.
> 
> Coccinelle is not especially good at this, because it is based on control
> flow, and a return or goto diverts the control flow away from the break.
> A hack to solve the problem is to put an if around the return or goto, but
> that gives the break a meaningless file name and line number.  I collected
> the following list, but it only has 439 results, so fewer than clang.  But
> maybe there are some files that are not considered by clang in the x86
> allyesconfig configuration.
> 
> Probably checkpatch is the best solution here, since it is not
> configuration sensitive and doesn't care about control flow.

Likely the clang compiler is the best option here.

It might be useful to add -Wunreachable-code-break to W=1
or just always enable it if it isn't already enabled.

diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 95e4cdb94fe9..3819787579d5 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -32,6 +32,7 @@ KBUILD_CFLAGS += $(call cc-option, -Wunused-but-set-variable)
 KBUILD_CFLAGS += $(call cc-option, -Wunused-const-variable)
 KBUILD_CFLAGS += $(call cc-option, -Wpacked-not-aligned)
 KBUILD_CFLAGS += $(call cc-option, -Wstringop-truncation)
+KBUILD_CFLAGS += $(call cc-option, -Wunreachable-code-break)
 # The following turn off the warnings enabled by -Wextra
 KBUILD_CFLAGS += -Wno-missing-field-initializers
 KBUILD_CFLAGS += -Wno-sign-compare

(and thank you Tom for pushing this forward)

checkpatch can't find instances like:

	case FOO:
		if (foo)
			return 1;
		else
			return 2;
		break;

As it doesn't track flow and relies on the number
of tabs to be the same for any goto/return and break;

checkpatch will warn on:

	case FOO:
		...
		goto bar;
		break;



^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-17 16:09 [RFC] treewide: cleanup unreachable breaks trix
  2020-10-17 16:24 ` Martin Blumenstingl
  2020-10-17 16:24 ` Joe Perches
@ 2020-10-17 21:01 ` Dan Williams
  2020-10-18  5:43 ` Greg KH
                   ` (2 subsequent siblings)
  5 siblings, 0 replies; 20+ messages in thread
From: Dan Williams @ 2020-10-17 21:01 UTC (permalink / raw)
  To: trix
  Cc: Linux Kernel Mailing List, linux-edac, Linux ACPI,
	Linux-pm mailing list, xen-devel, linux-block,
	openipmi-developer, linux-crypto, Linux ARM, linux-power,
	linux-gpio, amd-gfx list, Maling list - DRI developers, nouveau,
	virtualization, spice-devel, linux-iio, linux-amlogic,
	industrypack-devel, Linux-media@vger.kernel.org,
	MPT-FusionLinux.pdl, linux-scsi, linux-mtd, linux-can, Netdev,
	intel-wired-lan, ath10k, Linux Wireless List, linux-stm32,
	linux-nfc, linux-nvdimm, Linux PCI, linux-samsung-soc,
	platform-driver-x86, patches, storagedev, devel, linux-serial,
	USB list, usb-storage, linux-watchdog, ocfs2-devel, bpf,
	linux-integrity, linux-security-module, open list:KEYS-TRUSTED,
	alsa-devel, clang-built-linux

On Sat, Oct 17, 2020 at 9:10 AM <trix@redhat.com> wrote:
>
> From: Tom Rix <trix@redhat.com>
>
> This is a upcoming change to clean up a new warning treewide.
> I am wondering if the change could be one mega patch (see below) or
> normal patch per file about 100 patches or somewhere half way by collecting
> early acks.
>
> clang has a number of useful, new warnings see
> https://clang.llvm.org/docs/DiagnosticsReference.html
>
> This change cleans up -Wunreachable-code-break
> https://clang.llvm.org/docs/DiagnosticsReference.html#wunreachable-code-break
> for 266 of 485 warnings in this week's linux-next, allyesconfig on x86_64.
>
> The method of fixing was to look for warnings where the preceding statement
> was a simple statement and by inspection made the subsequent break unneeded.
> In order of frequency these look like
>
> return and break
>
>         switch (c->x86_vendor) {
>         case X86_VENDOR_INTEL:
>                 intel_p5_mcheck_init(c);
>                 return 1;
> -               break;
>
> goto and break
>
>         default:
>                 operation = 0; /* make gcc happy */
>                 goto fail_response;
> -               break;
>
> break and break
>                 case COLOR_SPACE_SRGB:
>                         /* by pass */
>                         REG_SET(OUTPUT_CSC_CONTROL, 0,
>                                 OUTPUT_CSC_GRPH_MODE, 0);
>                         break;
> -                       break;
>
> The exception to the simple statement, is a switch case with a block
> and the end of block is a return
>
>                         struct obj_buffer *buff = r->ptr;
>                         return scnprintf(str, PRIV_STR_SIZE,
>                                         "size=%u\naddr=0x%X\n", buff->size,
>                                         buff->addr);
>                 }
> -               break;
>
> Not considered obvious and excluded, breaks after
> multi level switches
> complicated if-else if-else blocks
> panic() or similar calls
>
> And there is an odd addition of a 'fallthrough' in drivers/tty/nozomi.c
[..]
> diff --git a/drivers/nvdimm/claim.c b/drivers/nvdimm/claim.c
> index 5a7c80053c62..2f250874b1a4 100644
> --- a/drivers/nvdimm/claim.c
> +++ b/drivers/nvdimm/claim.c
> @@ -200,11 +200,10 @@ ssize_t nd_namespace_store(struct device *dev,
>                 }
>                 break;
>         default:
>                 len = -EBUSY;
>                 goto out_attach;
> -               break;
>         }

Acked-by: Dan Williams <dan.j.williams@intel.com>

^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-17 16:09 [RFC] treewide: cleanup unreachable breaks trix
                   ` (2 preceding siblings ...)
  2020-10-17 21:01 ` Dan Williams
@ 2020-10-18  5:43 ` Greg KH
  2020-10-18 14:04   ` Tom Rix
  2020-10-19 19:42   ` Nick Desaulniers
  2020-10-18  9:29 ` Hans de Goede
  2020-10-18 18:59 ` [Ocfs2-devel] " Matthew Wilcox
  5 siblings, 2 replies; 20+ messages in thread
From: Greg KH @ 2020-10-18  5:43 UTC (permalink / raw)
  To: trix
  Cc: linux-kernel, linux-edac, linux-acpi, linux-pm, xen-devel,
	linux-block, openipmi-developer, linux-crypto, linux-arm-kernel,
	linux-power, linux-gpio, amd-gfx, dri-devel, nouveau,
	virtualization, spice-devel, linux-iio, linux-amlogic,
	industrypack-devel, linux-media, MPT-FusionLinux.pdl, linux-scsi,
	linux-mtd, linux-can, netdev, intel-wired-lan, ath10k,
	linux-wireless, linux-stm32, linux-nfc, linux-nvdimm, linux-pci,
	linux-samsung-soc, platform-driver-x86, patches, storagedev,
	devel, linux-serial, linux-usb, usb-storage, linux-watchdog,
	ocfs2-devel, bpf, linux-integrity, linux-security-module,
	keyrings, alsa-devel, clang-built-linux

On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
> From: Tom Rix <trix@redhat.com>
> 
> This is a upcoming change to clean up a new warning treewide.
> I am wondering if the change could be one mega patch (see below) or
> normal patch per file about 100 patches or somewhere half way by collecting
> early acks.

Please break it up into one-patch-per-subsystem, like normal, and get it
merged that way.

Sending us a patch, without even a diffstat to review, isn't going to
get you very far...

thanks,

greg k-h

^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-17 16:09 [RFC] treewide: cleanup unreachable breaks trix
                   ` (3 preceding siblings ...)
  2020-10-18  5:43 ` Greg KH
@ 2020-10-18  9:29 ` Hans de Goede
  2020-10-18 18:59 ` [Ocfs2-devel] " Matthew Wilcox
  5 siblings, 0 replies; 20+ messages in thread
From: Hans de Goede @ 2020-10-18  9:29 UTC (permalink / raw)
  To: trix, linux-kernel
  Cc: linux-edac, linux-acpi, linux-pm, xen-devel, linux-block,
	openipmi-developer, linux-crypto, linux-arm-kernel, linux-power,
	linux-gpio, amd-gfx, dri-devel, nouveau, virtualization,
	spice-devel, linux-iio, linux-amlogic, industrypack-devel,
	linux-media, MPT-FusionLinux.pdl, linux-scsi, linux-mtd,
	linux-can, netdev, intel-wired-lan, ath10k, linux-wireless,
	linux-stm32, linux-nfc, linux-nvdimm, linux-pci,
	linux-samsung-soc, platform-driver-x86, patches, storagedev,
	devel, linux-serial, linux-usb, usb-storage, linux-watchdog,
	ocfs2-devel, bpf, linux-integrity, linux-security-module,
	keyrings, alsa-devel, clang-built-linux

Hi Tom,

Quick self intro: I have take over drivers/platform/x86
maintainership from Andy.

On 10/17/20 6:09 PM, trix@redhat.com wrote:
> From: Tom Rix <trix@redhat.com>
> 
> This is a upcoming change to clean up a new warning treewide.
> I am wondering if the change could be one mega patch (see below) or
> normal patch per file about 100 patches or somewhere half way by collecting
> early acks.
> 
> clang has a number of useful, new warnings see
> https://clang.llvm.org/docs/DiagnosticsReference.html
> 
> This change cleans up -Wunreachable-code-break
> https://clang.llvm.org/docs/DiagnosticsReference.html#wunreachable-code-break
> for 266 of 485 warnings in this week's linux-next, allyesconfig on x86_64.
> 
> The method of fixing was to look for warnings where the preceding statement
> was a simple statement and by inspection made the subsequent break unneeded.
> In order of frequency these look like
> 
> return and break
> 
>  	switch (c->x86_vendor) {
>  	case X86_VENDOR_INTEL:
>  		intel_p5_mcheck_init(c);
>  		return 1;
> -		break;
> 
> goto and break
> 
>  	default:
>  		operation = 0; /* make gcc happy */
>  		goto fail_response;
> -		break;
> 
> break and break
>  		case COLOR_SPACE_SRGB:
>  			/* by pass */
>  			REG_SET(OUTPUT_CSC_CONTROL, 0,
>  				OUTPUT_CSC_GRPH_MODE, 0);
>  			break;
> -			break;
> 
> The exception to the simple statement, is a switch case with a block
> and the end of block is a return
> 
>  			struct obj_buffer *buff = r->ptr;
>  			return scnprintf(str, PRIV_STR_SIZE,
>  					"size=%u\naddr=0x%X\n", buff->size,
>  					buff->addr);
>  		}
> -		break;
> 
> Not considered obvious and excluded, breaks after
> multi level switches
> complicated if-else if-else blocks
> panic() or similar calls
> 
> And there is an odd addition of a 'fallthrough' in drivers/tty/nozomi.c

As Greg already mentioned please split this out into per subsystem patches.

I would be happy to take all the changes to drivers/platform/x86
code upstream as a single patch for all the files there.

Regards,

Hans


> ---
> 
> diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
> index 1c08cb9eb9f6..16ce86aed8e2 100644
> --- a/arch/x86/kernel/cpu/mce/core.c
> +++ b/arch/x86/kernel/cpu/mce/core.c
> @@ -1809,15 +1809,13 @@ static int __mcheck_cpu_ancient_init(struct cpuinfo_x86 *c)
>  
>  	switch (c->x86_vendor) {
>  	case X86_VENDOR_INTEL:
>  		intel_p5_mcheck_init(c);
>  		return 1;
> -		break;
>  	case X86_VENDOR_CENTAUR:
>  		winchip_mcheck_init(c);
>  		return 1;
> -		break;
>  	default:
>  		return 0;
>  	}
>  
>  	return 0;
> diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
> index 3f6b137ef4e6..3d4a48336084 100644
> --- a/arch/x86/kernel/cpu/microcode/amd.c
> +++ b/arch/x86/kernel/cpu/microcode/amd.c
> @@ -213,11 +213,10 @@ static unsigned int __verify_patch_size(u8 family, u32 sh_psize, size_t buf_size
>  		max_size = F14H_MPB_MAX_SIZE;
>  		break;
>  	default:
>  		WARN(1, "%s: WTF family: 0x%x\n", __func__, family);
>  		return 0;
> -		break;
>  	}
>  
>  	if (sh_psize > min_t(u32, buf_size, max_size))
>  		return 0;
>  
> diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
> index 838b719ec7ce..d5411a166685 100644
> --- a/drivers/acpi/utils.c
> +++ b/drivers/acpi/utils.c
> @@ -102,11 +102,10 @@ acpi_extract_package(union acpi_object *package,
>  				printk(KERN_WARNING PREFIX "Invalid package element"
>  					      " [%d]: got number, expecting"
>  					      " [%c]\n",
>  					      i, format_string[i]);
>  				return AE_BAD_DATA;
> -				break;
>  			}
>  			break;
>  
>  		case ACPI_TYPE_STRING:
>  		case ACPI_TYPE_BUFFER:
> @@ -127,11 +126,10 @@ acpi_extract_package(union acpi_object *package,
>  				printk(KERN_WARNING PREFIX "Invalid package element"
>  					      " [%d] got string/buffer,"
>  					      " expecting [%c]\n",
>  					      i, format_string[i]);
>  				return AE_BAD_DATA;
> -				break;
>  			}
>  			break;
>  		case ACPI_TYPE_LOCAL_REFERENCE:
>  			switch (format_string[i]) {
>  			case 'R':
> @@ -142,22 +140,20 @@ acpi_extract_package(union acpi_object *package,
>  				printk(KERN_WARNING PREFIX "Invalid package element"
>  					      " [%d] got reference,"
>  					      " expecting [%c]\n",
>  					      i, format_string[i]);
>  				return AE_BAD_DATA;
> -				break;
>  			}
>  			break;
>  
>  		case ACPI_TYPE_PACKAGE:
>  		default:
>  			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
>  					  "Found unsupported element at index=%d\n",
>  					  i));
>  			/* TBD: handle nested packages... */
>  			return AE_SUPPORT;
> -			break;
>  		}
>  	}
>  
>  	/*
>  	 * Validate output buffer.
> diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
> index 205a06752ca9..c7ac49042cee 100644
> --- a/drivers/base/power/main.c
> +++ b/drivers/base/power/main.c
> @@ -361,11 +361,10 @@ static pm_callback_t pm_op(const struct dev_pm_ops *ops, pm_message_t state)
>  	case PM_EVENT_HIBERNATE:
>  		return ops->poweroff;
>  	case PM_EVENT_THAW:
>  	case PM_EVENT_RECOVER:
>  		return ops->thaw;
> -		break;
>  	case PM_EVENT_RESTORE:
>  		return ops->restore;
>  #endif /* CONFIG_HIBERNATE_CALLBACKS */
>  	}
>  
> diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
> index adfc9352351d..f769fbd1b4c4 100644
> --- a/drivers/block/xen-blkback/blkback.c
> +++ b/drivers/block/xen-blkback/blkback.c
> @@ -1267,11 +1267,10 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
>  		operation_flags = REQ_PREFLUSH;
>  		break;
>  	default:
>  		operation = 0; /* make gcc happy */
>  		goto fail_response;
> -		break;
>  	}
>  
>  	/* Check that the number of segments is sane. */
>  	nseg = req->operation == BLKIF_OP_INDIRECT ?
>  	       req->u.indirect.nr_segments : req->u.rw.nr_segments;
> diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
> index f7b1c004a12b..3dd1d5abb298 100644
> --- a/drivers/char/ipmi/ipmi_devintf.c
> +++ b/drivers/char/ipmi/ipmi_devintf.c
> @@ -488,11 +488,10 @@ static long ipmi_ioctl(struct file   *file,
>  			rv = -EFAULT;
>  			break;
>  		}
>  
>  		return ipmi_set_my_address(priv->user, val.channel, val.value);
> -		break;
>  	}
>  
>  	case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD:
>  	{
>  		struct ipmi_channel_lun_address_set val;
> diff --git a/drivers/char/lp.c b/drivers/char/lp.c
> index 0ec73917d8dd..862c2fd933c7 100644
> --- a/drivers/char/lp.c
> +++ b/drivers/char/lp.c
> @@ -620,11 +620,10 @@ static int lp_do_ioctl(unsigned int minor, unsigned int cmd,
>  		case LPWAIT:
>  			LP_WAIT(minor) = arg;
>  			break;
>  		case LPSETIRQ:
>  			return -EINVAL;
> -			break;
>  		case LPGETIRQ:
>  			if (copy_to_user(argp, &LP_IRQ(minor),
>  					sizeof(int)))
>  				return -EFAULT;
>  			break;
> diff --git a/drivers/char/mwave/mwavedd.c b/drivers/char/mwave/mwavedd.c
> index e43c876a9223..11272d605ecd 100644
> --- a/drivers/char/mwave/mwavedd.c
> +++ b/drivers/char/mwave/mwavedd.c
> @@ -401,11 +401,10 @@ static long mwave_ioctl(struct file *file, unsigned int iocmd,
>  		}
>  			break;
>  	
>  		default:
>  			return -ENOTTY;
> -			break;
>  	} /* switch */
>  
>  	PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_ioctl, exit retval %x\n", retval);
>  
>  	return retval;
> diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c
> index 75ccf41a7cb9..0eb6f54e3b66 100644
> --- a/drivers/crypto/atmel-sha.c
> +++ b/drivers/crypto/atmel-sha.c
> @@ -457,11 +457,10 @@ static int atmel_sha_init(struct ahash_request *req)
>  		ctx->flags |= SHA_FLAGS_SHA512;
>  		ctx->block_size = SHA512_BLOCK_SIZE;
>  		break;
>  	default:
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	ctx->bufcnt = 0;
>  	ctx->digcnt[0] = 0;
>  	ctx->digcnt[1] = 0;
> diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
> index fcc08bbf6945..386a3a4cf279 100644
> --- a/drivers/edac/amd64_edac.c
> +++ b/drivers/edac/amd64_edac.c
> @@ -2459,38 +2459,30 @@ static int map_err_sym_to_channel(int err_sym, int sym_size)
>  	if (sym_size == 4)
>  		switch (err_sym) {
>  		case 0x20:
>  		case 0x21:
>  			return 0;
> -			break;
>  		case 0x22:
>  		case 0x23:
>  			return 1;
> -			break;
>  		default:
>  			return err_sym >> 4;
> -			break;
>  		}
>  	/* x8 symbols */
>  	else
>  		switch (err_sym) {
>  		/* imaginary bits not in a DIMM */
>  		case 0x10:
>  			WARN(1, KERN_ERR "Invalid error symbol: 0x%x\n",
>  					  err_sym);
>  			return -1;
> -			break;
> -
>  		case 0x11:
>  			return 0;
> -			break;
>  		case 0x12:
>  			return 1;
> -			break;
>  		default:
>  			return err_sym >> 3;
> -			break;
>  		}
>  	return -1;
>  }
>  
>  static int get_channel_from_ecc_syndrome(struct mem_ctl_info *mci, u16 syndrome)
> diff --git a/drivers/gpio/gpio-bd70528.c b/drivers/gpio/gpio-bd70528.c
> index 45b3da8da336..931e5765fe92 100644
> --- a/drivers/gpio/gpio-bd70528.c
> +++ b/drivers/gpio/gpio-bd70528.c
> @@ -69,21 +69,18 @@ static int bd70528_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
>  	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
>  		return regmap_update_bits(bdgpio->chip.regmap,
>  					  GPIO_OUT_REG(offset),
>  					  BD70528_GPIO_DRIVE_MASK,
>  					  BD70528_GPIO_OPEN_DRAIN);
> -		break;
>  	case PIN_CONFIG_DRIVE_PUSH_PULL:
>  		return regmap_update_bits(bdgpio->chip.regmap,
>  					  GPIO_OUT_REG(offset),
>  					  BD70528_GPIO_DRIVE_MASK,
>  					  BD70528_GPIO_PUSH_PULL);
> -		break;
>  	case PIN_CONFIG_INPUT_DEBOUNCE:
>  		return bd70528_set_debounce(bdgpio, offset,
>  					    pinconf_to_config_argument(config));
> -		break;
>  	default:
>  		break;
>  	}
>  	return -ENOTSUPP;
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c b/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c
> index 2a32b66959ba..130a0a0c8332 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c
> @@ -1328,11 +1328,10 @@ static bool configure_graphics_mode(
>  		case COLOR_SPACE_SRGB:
>  			/* by pass */
>  			REG_SET(OUTPUT_CSC_CONTROL, 0,
>  				OUTPUT_CSC_GRPH_MODE, 0);
>  			break;
> -			break;
>  		case COLOR_SPACE_SRGB_LIMITED:
>  			/* TV RGB */
>  			REG_SET(OUTPUT_CSC_CONTROL, 0,
>  				OUTPUT_CSC_GRPH_MODE, 1);
>  			break;
> diff --git a/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c b/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
> index d741787f75dc..42c7d157da32 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
> @@ -416,29 +416,22 @@ static int map_transmitter_id_to_phy_instance(
>  	enum transmitter transmitter)
>  {
>  	switch (transmitter) {
>  	case TRANSMITTER_UNIPHY_A:
>  		return 0;
> -	break;
>  	case TRANSMITTER_UNIPHY_B:
>  		return 1;
> -	break;
>  	case TRANSMITTER_UNIPHY_C:
>  		return 2;
> -	break;
>  	case TRANSMITTER_UNIPHY_D:
>  		return 3;
> -	break;
>  	case TRANSMITTER_UNIPHY_E:
>  		return 4;
> -	break;
>  	case TRANSMITTER_UNIPHY_F:
>  		return 5;
> -	break;
>  	case TRANSMITTER_UNIPHY_G:
>  		return 6;
> -	break;
>  	default:
>  		ASSERT(0);
>  		return 0;
>  	}
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
> index 2bbfa2e176a9..382581c4a674 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
> @@ -469,29 +469,22 @@ static int map_transmitter_id_to_phy_instance(
>  	enum transmitter transmitter)
>  {
>  	switch (transmitter) {
>  	case TRANSMITTER_UNIPHY_A:
>  		return 0;
> -	break;
>  	case TRANSMITTER_UNIPHY_B:
>  		return 1;
> -	break;
>  	case TRANSMITTER_UNIPHY_C:
>  		return 2;
> -	break;
>  	case TRANSMITTER_UNIPHY_D:
>  		return 3;
> -	break;
>  	case TRANSMITTER_UNIPHY_E:
>  		return 4;
> -	break;
>  	case TRANSMITTER_UNIPHY_F:
>  		return 5;
> -	break;
>  	case TRANSMITTER_UNIPHY_G:
>  		return 6;
> -	break;
>  	default:
>  		ASSERT(0);
>  		return 0;
>  	}
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c b/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
> index b622b4b1dac3..7b4b2304bbff 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
> @@ -444,29 +444,22 @@ static int map_transmitter_id_to_phy_instance(
>  	enum transmitter transmitter)
>  {
>  	switch (transmitter) {
>  	case TRANSMITTER_UNIPHY_A:
>  		return 0;
> -	break;
>  	case TRANSMITTER_UNIPHY_B:
>  		return 1;
> -	break;
>  	case TRANSMITTER_UNIPHY_C:
>  		return 2;
> -	break;
>  	case TRANSMITTER_UNIPHY_D:
>  		return 3;
> -	break;
>  	case TRANSMITTER_UNIPHY_E:
>  		return 4;
> -	break;
>  	case TRANSMITTER_UNIPHY_F:
>  		return 5;
> -	break;
>  	case TRANSMITTER_UNIPHY_G:
>  		return 6;
> -	break;
>  	default:
>  		ASSERT(0);
>  		return 0;
>  	}
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
> index 16fe7344702f..3d782b7c86cb 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
> @@ -381,29 +381,22 @@ static int map_transmitter_id_to_phy_instance(
>  	enum transmitter transmitter)
>  {
>  	switch (transmitter) {
>  	case TRANSMITTER_UNIPHY_A:
>  		return 0;
> -	break;
>  	case TRANSMITTER_UNIPHY_B:
>  		return 1;
> -	break;
>  	case TRANSMITTER_UNIPHY_C:
>  		return 2;
> -	break;
>  	case TRANSMITTER_UNIPHY_D:
>  		return 3;
> -	break;
>  	case TRANSMITTER_UNIPHY_E:
>  		return 4;
> -	break;
>  	case TRANSMITTER_UNIPHY_F:
>  		return 5;
> -	break;
>  	case TRANSMITTER_UNIPHY_G:
>  		return 6;
> -	break;
>  	default:
>  		ASSERT(0);
>  		return 0;
>  	}
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c b/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c
> index 5a5a9cb77acb..e9dd78c484d6 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c
> @@ -451,29 +451,22 @@ static int map_transmitter_id_to_phy_instance(
>  	enum transmitter transmitter)
>  {
>  	switch (transmitter) {
>  	case TRANSMITTER_UNIPHY_A:
>  		return 0;
> -	break;
>  	case TRANSMITTER_UNIPHY_B:
>  		return 1;
> -	break;
>  	case TRANSMITTER_UNIPHY_C:
>  		return 2;
> -	break;
>  	case TRANSMITTER_UNIPHY_D:
>  		return 3;
> -	break;
>  	case TRANSMITTER_UNIPHY_E:
>  		return 4;
> -	break;
>  	case TRANSMITTER_UNIPHY_F:
>  		return 5;
> -	break;
>  	case TRANSMITTER_UNIPHY_G:
>  		return 6;
> -	break;
>  	default:
>  		ASSERT(0);
>  		return 0;
>  	}
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c b/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
> index 0eae8cd35f9a..9dbf658162cd 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
> @@ -456,29 +456,22 @@ static int map_transmitter_id_to_phy_instance(
>  	enum transmitter transmitter)
>  {
>  	switch (transmitter) {
>  	case TRANSMITTER_UNIPHY_A:
>  		return 0;
> -	break;
>  	case TRANSMITTER_UNIPHY_B:
>  		return 1;
> -	break;
>  	case TRANSMITTER_UNIPHY_C:
>  		return 2;
> -	break;
>  	case TRANSMITTER_UNIPHY_D:
>  		return 3;
> -	break;
>  	case TRANSMITTER_UNIPHY_E:
>  		return 4;
> -	break;
>  	case TRANSMITTER_UNIPHY_F:
>  		return 5;
> -	break;
>  	case TRANSMITTER_UNIPHY_G:
>  		return 6;
> -	break;
>  	default:
>  		ASSERT(0);
>  		return 0;
>  	}
>  }
> diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
> index 38672f9e5c4f..bbe4e60dfd08 100644
> --- a/drivers/gpu/drm/mgag200/mgag200_mode.c
> +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
> @@ -792,25 +792,20 @@ static int mgag200_crtc_set_plls(struct mga_device *mdev, long clock)
>  	case G200_AGP:
>  		return mgag200_g200_set_plls(mdev, clock);
>  	case G200_SE_A:
>  	case G200_SE_B:
>  		return mga_g200se_set_plls(mdev, clock);
> -		break;
>  	case G200_WB:
>  	case G200_EW3:
>  		return mga_g200wb_set_plls(mdev, clock);
> -		break;
>  	case G200_EV:
>  		return mga_g200ev_set_plls(mdev, clock);
> -		break;
>  	case G200_EH:
>  	case G200_EH3:
>  		return mga_g200eh_set_plls(mdev, clock);
> -		break;
>  	case G200_ER:
>  		return mga_g200er_set_plls(mdev, clock);
> -		break;
>  	}
>  
>  	misc = RREG8(MGA_MISC_IN);
>  	misc &= ~MGAREG_MISC_CLK_SEL_MASK;
>  	misc |= MGAREG_MISC_CLK_SEL_MGA_MSK;
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c
> index 350f10a3de37..2ec84b8a3b3a 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c
> @@ -121,11 +121,10 @@ pll_map(struct nvkm_bios *bios)
>  	case NV_10:
>  	case NV_11:
>  	case NV_20:
>  	case NV_30:
>  		return nv04_pll_mapping;
> -		break;
>  	case NV_40:
>  		return nv40_pll_mapping;
>  	case NV_50:
>  		if (device->chipset == 0x50)
>  			return nv50_pll_mapping;
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c
> index efa50274df97..4884eb4a9221 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c
> @@ -138,21 +138,18 @@ mcp77_clk_read(struct nvkm_clk *base, enum nv_clk_src src)
>  		case 0x00000030: return read_pll(clk, 0x004020) >> P;
>  		}
>  		break;
>  	case nv_clk_src_mem:
>  		return 0;
> -		break;
>  	case nv_clk_src_vdec:
>  		P = (read_div(clk) & 0x00000700) >> 8;
>  
>  		switch (mast & 0x00400000) {
>  		case 0x00400000:
>  			return nvkm_clk_read(&clk->base, nv_clk_src_core) >> P;
> -			break;
>  		default:
>  			return 500000 >> P;
> -			break;
>  		}
>  		break;
>  	default:
>  		break;
>  	}
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c
> index 2ccb4b6be153..7b1eb44ff3da 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c
> @@ -169,11 +169,10 @@ nv50_ram_timing_read(struct nv50_ram *ram, u32 *timing)
>  	case NVKM_RAM_TYPE_GDDR3:
>  		T(CWL) = ((timing[2] & 0xff000000) >> 24) + 1;
>  		break;
>  	default:
>  		return -ENOSYS;
> -		break;
>  	}
>  
>  	T(WR) = ((timing[1] >> 24) & 0xff) - 1 - T(CWL);
>  
>  	return 0;
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c b/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c
> index e01746ce9fc4..1156634533f9 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c
> @@ -88,11 +88,10 @@ gk104_top_oneinit(struct nvkm_top *top)
>  		case 0x0000000e: B_(NVENC ); break;
>  		case 0x0000000f: A_(NVENC1); break;
>  		case 0x00000010: B_(NVDEC ); break;
>  		case 0x00000013: B_(CE    ); break;
>  		case 0x00000014: C_(GSP   ); break;
> -			break;
>  		default:
>  			break;
>  		}
>  
>  		nvkm_debug(subdev, "%02x.%d (%8s): addr %06x fault %2d "
> diff --git a/drivers/gpu/drm/qxl/qxl_ioctl.c b/drivers/gpu/drm/qxl/qxl_ioctl.c
> index 5cea6eea72ab..2072ddc9549c 100644
> --- a/drivers/gpu/drm/qxl/qxl_ioctl.c
> +++ b/drivers/gpu/drm/qxl/qxl_ioctl.c
> @@ -158,11 +158,10 @@ static int qxl_process_single_command(struct qxl_device *qdev,
>  	case QXL_CMD_SURFACE:
>  	case QXL_CMD_CURSOR:
>  	default:
>  		DRM_DEBUG("Only draw commands in execbuffers\n");
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
>  		return -EINVAL;
>  
> diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
> index e03988698755..66dc452d643a 100644
> --- a/drivers/iio/adc/meson_saradc.c
> +++ b/drivers/iio/adc/meson_saradc.c
> @@ -591,17 +591,15 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
>  
>  	switch (mask) {
>  	case IIO_CHAN_INFO_RAW:
>  		return meson_sar_adc_get_sample(indio_dev, chan, NO_AVERAGING,
>  						ONE_SAMPLE, val);
> -		break;
>  
>  	case IIO_CHAN_INFO_AVERAGE_RAW:
>  		return meson_sar_adc_get_sample(indio_dev, chan,
>  						MEAN_AVERAGING, EIGHT_SAMPLES,
>  						val);
> -		break;
>  
>  	case IIO_CHAN_INFO_SCALE:
>  		if (chan->type == IIO_VOLTAGE) {
>  			ret = regulator_get_voltage(priv->vref);
>  			if (ret < 0) {
> diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c
> index 222ebb26f013..431076dc0d2c 100644
> --- a/drivers/iio/imu/bmi160/bmi160_core.c
> +++ b/drivers/iio/imu/bmi160/bmi160_core.c
> @@ -484,11 +484,10 @@ static int bmi160_write_raw(struct iio_dev *indio_dev,
>  
>  	switch (mask) {
>  	case IIO_CHAN_INFO_SCALE:
>  		return bmi160_set_scale(data,
>  					bmi160_to_sensor(chan->type), val2);
> -		break;
>  	case IIO_CHAN_INFO_SAMP_FREQ:
>  		return bmi160_set_odr(data, bmi160_to_sensor(chan->type),
>  				      val, val2);
>  	default:
>  		return -EINVAL;
> diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
> index d480a514c983..3940714e4397 100644
> --- a/drivers/ipack/devices/ipoctal.c
> +++ b/drivers/ipack/devices/ipoctal.c
> @@ -542,11 +542,10 @@ static void ipoctal_set_termios(struct tty_struct *tty,
>  		mr1 |= MR1_RxRTS_CONTROL_OFF;
>  		mr2 |= MR2_TxRTS_CONTROL_ON | MR2_CTS_ENABLE_TX_OFF;
>  		break;
>  	default:
>  		return;
> -		break;
>  	}
>  
>  	baud = tty_get_baud_rate(tty);
>  	tty_termios_encode_baud_rate(&tty->termios, baud, baud);
>  
> diff --git a/drivers/media/dvb-frontends/drx39xyj/drxj.c b/drivers/media/dvb-frontends/drx39xyj/drxj.c
> index 237b9d04c076..37b32d9b398d 100644
> --- a/drivers/media/dvb-frontends/drx39xyj/drxj.c
> +++ b/drivers/media/dvb-frontends/drx39xyj/drxj.c
> @@ -2323,11 +2323,10 @@ hi_command(struct i2c_device_addr *dev_addr, const struct drxj_hi_cmd *cmd, u16
>  		/* No parameters */
>  		break;
>  
>  	default:
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	/* Write command */
>  	rc = drxj_dap_write_reg16(dev_addr, SIO_HI_RA_RAM_CMD__A, cmd->cmd, 0);
>  	if (rc != 0) {
> @@ -3592,11 +3591,10 @@ static int ctrl_set_uio_cfg(struct drx_demod_instance *demod, struct drxuio_cfg
>  				goto rw_error;
>  			}
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  		}		/* switch ( uio_cfg->mode ) */
>  		break;
>        /*====================================================================*/
>  	case DRX_UIO3:
>  		/* DRX_UIO3: GPIO UIO-3 */
> @@ -3616,11 +3614,10 @@ static int ctrl_set_uio_cfg(struct drx_demod_instance *demod, struct drxuio_cfg
>  				goto rw_error;
>  			}
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  		}		/* switch ( uio_cfg->mode ) */
>  		break;
>        /*====================================================================*/
>  	case DRX_UIO4:
>  		/* DRX_UIO4: IRQN UIO-4 */
> @@ -3640,11 +3637,10 @@ static int ctrl_set_uio_cfg(struct drx_demod_instance *demod, struct drxuio_cfg
>  			ext_attr->uio_irqn_mode = uio_cfg->mode;
>  			break;
>  		case DRX_UIO_MODE_FIRMWARE0:
>  		default:
>  			return -EINVAL;
> -			break;
>  		}		/* switch ( uio_cfg->mode ) */
>  		break;
>        /*====================================================================*/
>  	default:
>  		return -EINVAL;
> @@ -10951,11 +10947,10 @@ ctrl_set_standard(struct drx_demod_instance *demod, enum drx_standard *standard)
>  		}
>  		break;
>  	default:
>  		ext_attr->standard = DRX_STANDARD_UNKNOWN;
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	return 0;
>  rw_error:
>  	/* Don't know what the standard is now ... try again */
> @@ -11072,11 +11067,10 @@ ctrl_power_mode(struct drx_demod_instance *demod, enum drx_power_mode *mode)
>  		sio_cc_pwd_mode = SIO_CC_PWD_MODE_LEVEL_OSC;
>  		break;
>  	default:
>  		/* Unknow sleep mode */
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	/* Check if device needs to be powered up */
>  	if ((common_attr->current_power_mode != DRX_POWER_UP)) {
>  		rc = power_up_device(demod);
> @@ -11894,11 +11888,10 @@ static int drx_ctrl_u_code(struct drx_demod_instance *demod,
>  			}
>  			break;
>  		}
>  		default:
>  			return -EINVAL;
> -			break;
>  
>  		}
>  		mc_data += mc_block_nr_bytes;
>  	}
>  
> diff --git a/drivers/media/dvb-frontends/drxd_hard.c b/drivers/media/dvb-frontends/drxd_hard.c
> index 45f982863904..a7eb81df88c2 100644
> --- a/drivers/media/dvb-frontends/drxd_hard.c
> +++ b/drivers/media/dvb-frontends/drxd_hard.c
> @@ -1620,11 +1620,10 @@ static int CorrectSysClockDeviation(struct drxd_state *state)
>  		case 6000000:
>  			bandwidth = DRXD_BANDWIDTH_6MHZ_IN_HZ;
>  			break;
>  		default:
>  			return -1;
> -			break;
>  		}
>  
>  		/* Compute new sysclock value
>  		   sysClockFreq = (((incr + 2^23)*bandwidth)/2^21)/1000 */
>  		incr += (1 << 23);
> diff --git a/drivers/media/dvb-frontends/nxt200x.c b/drivers/media/dvb-frontends/nxt200x.c
> index 35b83b1dd82c..200b6dbc75f8 100644
> --- a/drivers/media/dvb-frontends/nxt200x.c
> +++ b/drivers/media/dvb-frontends/nxt200x.c
> @@ -166,11 +166,10 @@ static int nxt200x_writereg_multibyte (struct nxt200x_state* state, u8 reg, u8*
>  			len2 = ((attr << 4) | 0x10) | len;
>  			buf = 0x80;
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  
>  	/* set multi register length */
>  	nxt200x_writebytes(state, 0x34, &len2, 1);
>  
> @@ -188,11 +187,10 @@ static int nxt200x_writereg_multibyte (struct nxt200x_state* state, u8 reg, u8*
>  			if (buf == 0)
>  				return 0;
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  
>  	pr_warn("Error writing multireg register 0x%02X\n", reg);
>  
>  	return 0;
> @@ -214,11 +212,10 @@ static int nxt200x_readreg_multibyte (struct nxt200x_state* state, u8 reg, u8* d
>  			nxt200x_writebytes(state, 0x34, &len2, 1);
>  
>  			/* read the actual data */
>  			nxt200x_readbytes(state, reg, data, len);
>  			return 0;
> -			break;
>  		case NXT2004:
>  			/* probably not right, but gives correct values */
>  			attr = 0x02;
>  			if (reg & 0x80) {
>  				attr = attr << 1;
> @@ -237,14 +234,12 @@ static int nxt200x_readreg_multibyte (struct nxt200x_state* state, u8 reg, u8* d
>  			/* read the actual data */
>  			for(i = 0; i < len; i++) {
>  				nxt200x_readbytes(state, 0x36 + i, &data[i], 1);
>  			}
>  			return 0;
> -			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  }
>  
>  static void nxt200x_microcontroller_stop (struct nxt200x_state* state)
>  {
> @@ -372,11 +367,10 @@ static int nxt200x_writetuner (struct nxt200x_state* state, u8* data)
>  			}
>  			pr_warn("timeout error writing to tuner\n");
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  	return 0;
>  }
>  
>  static void nxt200x_agc_reset(struct nxt200x_state* state)
> @@ -553,11 +547,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
>  			if (state->config->set_ts_params)
>  				state->config->set_ts_params(fe, 0);
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  
>  	if (fe->ops.tuner_ops.calc_regs) {
>  		/* get tuning information */
>  		fe->ops.tuner_ops.calc_regs(fe, buf, 5);
> @@ -578,11 +571,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
>  		case VSB_8:
>  			buf[0] = 0x70;
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  	nxt200x_writebytes(state, 0x42, buf, 1);
>  
>  	/* configure sdm */
>  	switch (state->demod_chip) {
> @@ -592,11 +584,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
>  		case NXT2004:
>  			buf[0] = 0x07;
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  	nxt200x_writebytes(state, 0x57, buf, 1);
>  
>  	/* write sdm1 input */
>  	buf[0] = 0x10;
> @@ -608,11 +599,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
>  		case NXT2004:
>  			nxt200x_writebytes(state, 0x58, buf, 2);
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  
>  	/* write sdmx input */
>  	switch (p->modulation) {
>  		case QAM_64:
> @@ -624,11 +614,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
>  		case VSB_8:
>  				buf[0] = 0x60;
>  				break;
>  		default:
>  				return -EINVAL;
> -				break;
>  	}
>  	buf[1] = 0x00;
>  	switch (state->demod_chip) {
>  		case NXT2002:
>  			nxt200x_writereg_multibyte(state, 0x5C, buf, 2);
> @@ -636,11 +625,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
>  		case NXT2004:
>  			nxt200x_writebytes(state, 0x5C, buf, 2);
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  
>  	/* write adc power lpf fc */
>  	buf[0] = 0x05;
>  	nxt200x_writebytes(state, 0x43, buf, 1);
> @@ -662,11 +650,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
>  		case NXT2004:
>  			nxt200x_writebytes(state, 0x4B, buf, 2);
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  
>  	/* write kg1 */
>  	buf[0] = 0x00;
>  	nxt200x_writebytes(state, 0x4D, buf, 1);
> @@ -718,11 +705,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
>  		case VSB_8:
>  				buf[0] = 0x00;
>  				break;
>  		default:
>  				return -EINVAL;
> -				break;
>  	}
>  	nxt200x_writebytes(state, 0x30, buf, 1);
>  
>  	/* write agc control reg */
>  	buf[0] = 0x00;
> @@ -740,11 +726,10 @@ static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
>  			nxt200x_writebytes(state, 0x49, buf, 2);
>  			nxt200x_writebytes(state, 0x4B, buf, 2);
>  			break;
>  		default:
>  			return -EINVAL;
> -			break;
>  	}
>  
>  	/* write agc control reg */
>  	buf[0] = 0x04;
>  	nxt200x_writebytes(state, 0x41, buf, 1);
> @@ -1112,11 +1097,10 @@ static int nxt200x_init(struct dvb_frontend* fe)
>  			case NXT2004:
>  				ret = nxt2004_init(fe);
>  				break;
>  			default:
>  				return -EINVAL;
> -				break;
>  		}
>  		state->initialised = 1;
>  	}
>  	return ret;
>  }
> diff --git a/drivers/media/dvb-frontends/si21xx.c b/drivers/media/dvb-frontends/si21xx.c
> index a116eff417f2..e31eb2c5cc4c 100644
> --- a/drivers/media/dvb-frontends/si21xx.c
> +++ b/drivers/media/dvb-frontends/si21xx.c
> @@ -462,14 +462,12 @@ static int si21xx_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage volt)
>  	val = (0x80 | si21_readreg(state, LNB_CTRL_REG_1));
>  
>  	switch (volt) {
>  	case SEC_VOLTAGE_18:
>  		return si21_writereg(state, LNB_CTRL_REG_1, val | 0x40);
> -		break;
>  	case SEC_VOLTAGE_13:
>  		return si21_writereg(state, LNB_CTRL_REG_1, (val & ~0x40));
> -		break;
>  	default:
>  		return -EINVAL;
>  	}
>  }
>  
> diff --git a/drivers/media/tuners/mt2063.c b/drivers/media/tuners/mt2063.c
> index 2240d214dfac..d105431a2e2d 100644
> --- a/drivers/media/tuners/mt2063.c
> +++ b/drivers/media/tuners/mt2063.c
> @@ -1847,11 +1847,10 @@ static int mt2063_init(struct dvb_frontend *fe)
>  		def = MT2063B0_defaults;
>  		break;
>  
>  	default:
>  		return -ENODEV;
> -		break;
>  	}
>  
>  	while (status >= 0 && *def) {
>  		u8 reg = *def++;
>  		u8 val = *def++;
> diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
> index 9903e9660a38..3078fac34e51 100644
> --- a/drivers/message/fusion/mptbase.c
> +++ b/drivers/message/fusion/mptbase.c
> @@ -471,11 +471,10 @@ mpt_turbo_reply(MPT_ADAPTER *ioc, u32 pa)
>  			req_idx = pa & 0x0000FFFF;
>  			mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
>  			mpt_free_msg_frame(ioc, mf);
>  			mb();
>  			return;
> -			break;
>  		}
>  		mr = (MPT_FRAME_HDR *) CAST_U32_TO_PTR(pa);
>  		break;
>  	case MPI_CONTEXT_REPLY_TYPE_SCSI_TARGET:
>  		cb_idx = mpt_get_cb_idx(MPTSTM_DRIVER);
> diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
> index a97eb5d47705..686e8b6a4c55 100644
> --- a/drivers/misc/mei/hbm.c
> +++ b/drivers/misc/mei/hbm.c
> @@ -1375,11 +1375,10 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
>  
>  		dev->dev_state = MEI_DEV_POWER_DOWN;
>  		dev_info(dev->dev, "hbm: stop response: resetting.\n");
>  		/* force the reset */
>  		return -EPROTO;
> -		break;
>  
>  	case CLIENT_DISCONNECT_REQ_CMD:
>  		dev_dbg(dev->dev, "hbm: disconnect request: message received\n");
>  
>  		disconnect_req = (struct hbm_client_connect_request *)mei_msg;
> diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
> index b40f46a43fc6..323035d4f2d0 100644
> --- a/drivers/mtd/mtdchar.c
> +++ b/drivers/mtd/mtdchar.c
> @@ -879,21 +879,19 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
>  		loff_t offs;
>  
>  		if (copy_from_user(&offs, argp, sizeof(loff_t)))
>  			return -EFAULT;
>  		return mtd_block_isbad(mtd, offs);
> -		break;
>  	}
>  
>  	case MEMSETBADBLOCK:
>  	{
>  		loff_t offs;
>  
>  		if (copy_from_user(&offs, argp, sizeof(loff_t)))
>  			return -EFAULT;
>  		return mtd_block_markbad(mtd, offs);
> -		break;
>  	}
>  
>  	case OTPSELECT:
>  	{
>  		int mode;
> diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
> index c3f49543ff26..9c215f7c5f81 100644
> --- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
> +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
> @@ -73,15 +73,15 @@ static const struct can_bittiming_const mcp251xfd_data_bittiming_const = {
>  
>  static const char *__mcp251xfd_get_model_str(enum mcp251xfd_model model)
>  {
>  	switch (model) {
>  	case MCP251XFD_MODEL_MCP2517FD:
> -		return "MCP2517FD"; break;
> +		return "MCP2517FD";
>  	case MCP251XFD_MODEL_MCP2518FD:
> -		return "MCP2518FD"; break;
> +		return "MCP2518FD";
>  	case MCP251XFD_MODEL_MCP251XFD:
> -		return "MCP251xFD"; break;
> +		return "MCP251xFD";
>  	}
>  
>  	return "<unknown>";
>  }
>  
> @@ -93,25 +93,25 @@ mcp251xfd_get_model_str(const struct mcp251xfd_priv *priv)
>  
>  static const char *mcp251xfd_get_mode_str(const u8 mode)
>  {
>  	switch (mode) {
>  	case MCP251XFD_REG_CON_MODE_MIXED:
> -		return "Mixed (CAN FD/CAN 2.0)"; break;
> +		return "Mixed (CAN FD/CAN 2.0)";
>  	case MCP251XFD_REG_CON_MODE_SLEEP:
> -		return "Sleep"; break;
> +		return "Sleep";
>  	case MCP251XFD_REG_CON_MODE_INT_LOOPBACK:
> -		return "Internal Loopback"; break;
> +		return "Internal Loopback";
>  	case MCP251XFD_REG_CON_MODE_LISTENONLY:
> -		return "Listen Only"; break;
> +		return "Listen Only";
>  	case MCP251XFD_REG_CON_MODE_CONFIG:
> -		return "Configuration"; break;
> +		return "Configuration";
>  	case MCP251XFD_REG_CON_MODE_EXT_LOOPBACK:
> -		return "External Loopback"; break;
> +		return "External Loopback";
>  	case MCP251XFD_REG_CON_MODE_CAN2_0:
> -		return "CAN 2.0"; break;
> +		return "CAN 2.0";
>  	case MCP251XFD_REG_CON_MODE_RESTRICTED:
> -		return "Restricted Operation"; break;
> +		return "Restricted Operation";
>  	}
>  
>  	return "<unknown>";
>  }
>  
> diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
> index 0f865daeb36d..bf5e0e9bd0e2 100644
> --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
> +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
> @@ -1161,11 +1161,10 @@ int aq_nic_set_link_ksettings(struct aq_nic_s *self,
>  			break;
>  
>  		default:
>  			err = -1;
>  			goto err_exit;
> -		break;
>  		}
>  		if (!(self->aq_nic_cfg.aq_hw_caps->link_speed_msk & rate)) {
>  			err = -1;
>  			goto err_exit;
>  		}
> diff --git a/drivers/net/ethernet/cisco/enic/enic_ethtool.c b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
> index a4dd52bba2c3..1a9803f2073e 100644
> --- a/drivers/net/ethernet/cisco/enic/enic_ethtool.c
> +++ b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
> @@ -432,11 +432,10 @@ static int enic_grxclsrule(struct enic *enic, struct ethtool_rxnfc *cmd)
>  	case IPPROTO_UDP:
>  		fsp->flow_type = UDP_V4_FLOW;
>  		break;
>  	default:
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	fsp->h_u.tcp_ip4_spec.ip4src = flow_get_u32_src(&n->keys);
>  	fsp->m_u.tcp_ip4_spec.ip4src = (__u32)~0;
>  
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c
> index de563cfd294d..4b93ba149ec5 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c
> @@ -348,11 +348,10 @@ static s32 ixgbe_calc_eeprom_checksum_X540(struct ixgbe_hw *hw)
>  			continue;
>  
>  		if (ixgbe_read_eerd_generic(hw, pointer, &length)) {
>  			hw_dbg(hw, "EEPROM read failed\n");
>  			return IXGBE_ERR_EEPROM;
> -			break;
>  		}
>  
>  		/* Skip pointer section if length is invalid. */
>  		if (length == 0xFFFF || length == 0 ||
>  		    (pointer + length) >= hw->eeprom.word_size)
> diff --git a/drivers/net/wan/lmc/lmc_proto.c b/drivers/net/wan/lmc/lmc_proto.c
> index e8b0b902b424..4e9cc83b615a 100644
> --- a/drivers/net/wan/lmc/lmc_proto.c
> +++ b/drivers/net/wan/lmc/lmc_proto.c
> @@ -87,21 +87,17 @@ void lmc_proto_close(lmc_softc_t *sc)
>  __be16 lmc_proto_type(lmc_softc_t *sc, struct sk_buff *skb) /*FOLD00*/
>  {
>      switch(sc->if_type){
>      case LMC_PPP:
>  	    return hdlc_type_trans(skb, sc->lmc_device);
> -	    break;
>      case LMC_NET:
>          return htons(ETH_P_802_2);
> -        break;
>      case LMC_RAW: /* Packet type for skbuff kind of useless */
>          return htons(ETH_P_802_2);
> -        break;
>      default:
>          printk(KERN_WARNING "%s: No protocol set for this interface, assuming 802.2 (which is wrong!!)\n", sc->name);
>          return htons(ETH_P_802_2);
> -        break;
>      }
>  }
>  
>  void lmc_proto_netif(lmc_softc_t *sc, struct sk_buff *skb) /*FOLD00*/
>  {
> diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
> index 5c1af2021883..9c4e6cf2137a 100644
> --- a/drivers/net/wireless/ath/ath10k/htt_rx.c
> +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
> @@ -3876,11 +3876,10 @@ bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
>  		atomic_inc(&htt->num_mpdus_ready);
>  
>  		return ath10k_htt_rx_proc_rx_frag_ind(htt,
>  						      &resp->rx_frag_ind,
>  						      skb);
> -		break;
>  	}
>  	case HTT_T2H_MSG_TYPE_TEST:
>  		break;
>  	case HTT_T2H_MSG_TYPE_STATS_CONF:
>  		trace_ath10k_htt_stats(ar, skb->data, skb->len);
> diff --git a/drivers/net/wireless/ath/ath6kl/testmode.c b/drivers/net/wireless/ath/ath6kl/testmode.c
> index f3906dbe5495..89c7c4e25169 100644
> --- a/drivers/net/wireless/ath/ath6kl/testmode.c
> +++ b/drivers/net/wireless/ath/ath6kl/testmode.c
> @@ -92,11 +92,10 @@ int ath6kl_tm_cmd(struct wiphy *wiphy, struct wireless_dev *wdev,
>  
>  		ath6kl_wmi_test_cmd(ar->wmi, buf, buf_len);
>  
>  		return 0;
>  
> -		break;
>  	case ATH6KL_TM_CMD_RX_REPORT:
>  	default:
>  		return -EOPNOTSUPP;
>  	}
>  }
> diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
> index 6609ce122e6e..b66eeb577272 100644
> --- a/drivers/net/wireless/ath/ath9k/hw.c
> +++ b/drivers/net/wireless/ath/ath9k/hw.c
> @@ -2306,11 +2306,10 @@ void ath9k_hw_beaconinit(struct ath_hw *ah, u32 next_beacon, u32 beacon_period)
>  		break;
>  	default:
>  		ath_dbg(ath9k_hw_common(ah), BEACON,
>  			"%s: unsupported opmode: %d\n", __func__, ah->opmode);
>  		return;
> -		break;
>  	}
>  
>  	REG_WRITE(ah, AR_BEACON_PERIOD, beacon_period);
>  	REG_WRITE(ah, AR_DMA_BEACON_PERIOD, beacon_period);
>  	REG_WRITE(ah, AR_SWBA_PERIOD, beacon_period);
> diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
> index cbdebefb854a..8698ca4d30de 100644
> --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
> +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
> @@ -1200,17 +1200,15 @@ static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
>  	switch (vif->type) {
>  	case NL80211_IFTYPE_STATION:
>  		return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
>  						force_assoc_off,
>  						bssid_override);
> -		break;
>  	case NL80211_IFTYPE_AP:
>  		if (!vif->p2p)
>  			return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
>  		else
>  			return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
> -		break;
>  	case NL80211_IFTYPE_MONITOR:
>  		return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
>  	case NL80211_IFTYPE_P2P_DEVICE:
>  		return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
>  	case NL80211_IFTYPE_ADHOC:
> diff --git a/drivers/net/wireless/intersil/p54/eeprom.c b/drivers/net/wireless/intersil/p54/eeprom.c
> index 5bd35c147e19..3ca9d26df174 100644
> --- a/drivers/net/wireless/intersil/p54/eeprom.c
> +++ b/drivers/net/wireless/intersil/p54/eeprom.c
> @@ -868,11 +868,10 @@ int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
>  				err = -ENOMSG;
>  				goto err;
>  			} else {
>  				goto good_eeprom;
>  			}
> -			break;
>  		default:
>  			break;
>  		}
>  
>  		crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
> diff --git a/drivers/net/wireless/intersil/prism54/oid_mgt.c b/drivers/net/wireless/intersil/prism54/oid_mgt.c
> index 9fd307ca4b6d..7b251ae90a68 100644
> --- a/drivers/net/wireless/intersil/prism54/oid_mgt.c
> +++ b/drivers/net/wireless/intersil/prism54/oid_mgt.c
> @@ -785,21 +785,19 @@ mgt_response_to_str(enum oid_num_t n, union oid_res_t *r, char *str)
>  			struct obj_buffer *buff = r->ptr;
>  			return scnprintf(str, PRIV_STR_SIZE,
>  					"size=%u\naddr=0x%X\n", buff->size,
>  					buff->addr);
>  		}
> -		break;
>  	case OID_TYPE_BSS:{
>  			struct obj_bss *bss = r->ptr;
>  			return scnprintf(str, PRIV_STR_SIZE,
>  					"age=%u\nchannel=%u\n"
>  					"capinfo=0x%X\nrates=0x%X\n"
>  					"basic_rates=0x%X\n", bss->age,
>  					bss->channel, bss->capinfo,
>  					bss->rates, bss->basic_rates);
>  		}
> -		break;
>  	case OID_TYPE_BSSLIST:{
>  			struct obj_bsslist *list = r->ptr;
>  			int i, k;
>  			k = scnprintf(str, PRIV_STR_SIZE, "nr=%u\n", list->nr);
>  			for (i = 0; i < list->nr; i++)
> @@ -812,53 +810,47 @@ mgt_response_to_str(enum oid_num_t n, union oid_res_t *r, char *str)
>  					      list->bsslist[i].capinfo,
>  					      list->bsslist[i].rates,
>  					      list->bsslist[i].basic_rates);
>  			return k;
>  		}
> -		break;
>  	case OID_TYPE_FREQUENCIES:{
>  			struct obj_frequencies *freq = r->ptr;
>  			int i, t;
>  			printk("nr : %u\n", freq->nr);
>  			t = scnprintf(str, PRIV_STR_SIZE, "nr=%u\n", freq->nr);
>  			for (i = 0; i < freq->nr; i++)
>  				t += scnprintf(str + t, PRIV_STR_SIZE - t,
>  					      "mhz[%u]=%u\n", i, freq->mhz[i]);
>  			return t;
>  		}
> -		break;
>  	case OID_TYPE_MLME:{
>  			struct obj_mlme *mlme = r->ptr;
>  			return scnprintf(str, PRIV_STR_SIZE,
>  					"id=0x%X\nstate=0x%X\ncode=0x%X\n",
>  					mlme->id, mlme->state, mlme->code);
>  		}
> -		break;
>  	case OID_TYPE_MLMEEX:{
>  			struct obj_mlmeex *mlme = r->ptr;
>  			return scnprintf(str, PRIV_STR_SIZE,
>  					"id=0x%X\nstate=0x%X\n"
>  					"code=0x%X\nsize=0x%X\n", mlme->id,
>  					mlme->state, mlme->code, mlme->size);
>  		}
> -		break;
>  	case OID_TYPE_ATTACH:{
>  			struct obj_attachment *attach = r->ptr;
>  			return scnprintf(str, PRIV_STR_SIZE,
>  					"id=%d\nsize=%d\n",
>  					attach->id,
>  					attach->size);
>  		}
> -		break;
>  	case OID_TYPE_SSID:{
>  			struct obj_ssid *ssid = r->ptr;
>  			return scnprintf(str, PRIV_STR_SIZE,
>  					"length=%u\noctets=%.*s\n",
>  					ssid->length, ssid->length,
>  					ssid->octets);
>  		}
> -		break;
>  	case OID_TYPE_KEY:{
>  			struct obj_key *key = r->ptr;
>  			int t, i;
>  			t = scnprintf(str, PRIV_STR_SIZE,
>  				     "type=0x%X\nlength=0x%X\nkey=0x",
> @@ -867,11 +859,10 @@ mgt_response_to_str(enum oid_num_t n, union oid_res_t *r, char *str)
>  				t += scnprintf(str + t, PRIV_STR_SIZE - t,
>  					      "%02X:", key->key[i]);
>  			t += scnprintf(str + t, PRIV_STR_SIZE - t, "\n");
>  			return t;
>  		}
> -		break;
>  	case OID_TYPE_RAW:
>  	case OID_TYPE_ADDR:{
>  			unsigned char *buff = r->ptr;
>  			int t, i;
>  			t = scnprintf(str, PRIV_STR_SIZE, "hex data=");
> @@ -879,11 +870,10 @@ mgt_response_to_str(enum oid_num_t n, union oid_res_t *r, char *str)
>  				t += scnprintf(str + t, PRIV_STR_SIZE - t,
>  					      "%02X:", buff[i]);
>  			t += scnprintf(str + t, PRIV_STR_SIZE - t, "\n");
>  			return t;
>  		}
> -		break;
>  	default:
>  		BUG();
>  	}
>  	return 0;
>  }
> diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/hw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/hw.c
> index 63f9ea21962f..bd9160b166c5 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/hw.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/hw.c
> @@ -1224,11 +1224,10 @@ static int _rtl88ee_set_media_status(struct ieee80211_hw *hw,
>  			"Set Network type to AP!\n");
>  		break;
>  	default:
>  		pr_err("Network type %d not support!\n", type);
>  		return 1;
> -		break;
>  	}
>  
>  	/* MSR_INFRA == Link in infrastructure network;
>  	 * MSR_ADHOC == Link in ad hoc network;
>  	 * Therefore, check link state is necessary.
> diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/hw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/hw.c
> index a36dc6e726d2..f8a1de6e9849 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/hw.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/hw.c
> @@ -1130,11 +1130,10 @@ static int _rtl8723e_set_media_status(struct ieee80211_hw *hw,
>  			"Set Network type to AP!\n");
>  		break;
>  	default:
>  		pr_err("Network type %d not support!\n", type);
>  		return 1;
> -		break;
>  	}
>  
>  	/* MSR_INFRA == Link in infrastructure network;
>  	 * MSR_ADHOC == Link in ad hoc network;
>  	 * Therefore, check link state is necessary.
> diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c
> index f41a7643b9c4..225b8cd44f23 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c
> @@ -2083,16 +2083,14 @@ bool rtl8812ae_phy_config_rf_with_headerfile(struct ieee80211_hw *hw,
>  	switch (rfpath) {
>  	case RF90_PATH_A:
>  		return __rtl8821ae_phy_config_with_headerfile(hw,
>  				radioa_array_table_a, radioa_arraylen_a,
>  				_rtl8821ae_config_rf_radio_a);
> -		break;
>  	case RF90_PATH_B:
>  		return __rtl8821ae_phy_config_with_headerfile(hw,
>  				radioa_array_table_b, radioa_arraylen_b,
>  				_rtl8821ae_config_rf_radio_b);
> -		break;
>  	case RF90_PATH_C:
>  	case RF90_PATH_D:
>  		pr_err("switch case %#x not processed\n", rfpath);
>  		break;
>  	}
> @@ -2114,11 +2112,10 @@ bool rtl8821ae_phy_config_rf_with_headerfile(struct ieee80211_hw *hw,
>  	switch (rfpath) {
>  	case RF90_PATH_A:
>  		return __rtl8821ae_phy_config_with_headerfile(hw,
>  			radioa_array_table, radioa_arraylen,
>  			_rtl8821ae_config_rf_radio_a);
> -		break;
>  
>  	case RF90_PATH_B:
>  	case RF90_PATH_C:
>  	case RF90_PATH_D:
>  		pr_err("switch case %#x not processed\n", rfpath);
> diff --git a/drivers/nfc/st21nfca/core.c b/drivers/nfc/st21nfca/core.c
> index 2ce17932a073..6ca0d2f56b18 100644
> --- a/drivers/nfc/st21nfca/core.c
> +++ b/drivers/nfc/st21nfca/core.c
> @@ -792,11 +792,10 @@ static int st21nfca_hci_im_transceive(struct nfc_hci_dev *hdev,
>  		return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
>  					      ST21NFCA_WR_XCHG_DATA, skb->data,
>  					      skb->len,
>  					      st21nfca_hci_data_exchange_cb,
>  					      info);
> -		break;
>  	default:
>  		return 1;
>  	}
>  }
>  
> diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
> index 3bd97c73f983..c70f62fe321e 100644
> --- a/drivers/nfc/trf7970a.c
> +++ b/drivers/nfc/trf7970a.c
> @@ -1380,11 +1380,10 @@ static int trf7970a_is_iso15693_write_or_lock(u8 cmd)
>  	case ISO15693_CMD_WRITE_AFI:
>  	case ISO15693_CMD_LOCK_AFI:
>  	case ISO15693_CMD_WRITE_DSFID:
>  	case ISO15693_CMD_LOCK_DSFID:
>  		return 1;
> -		break;
>  	default:
>  		return 0;
>  	}
>  }
>  
> diff --git a/drivers/nvdimm/claim.c b/drivers/nvdimm/claim.c
> index 5a7c80053c62..2f250874b1a4 100644
> --- a/drivers/nvdimm/claim.c
> +++ b/drivers/nvdimm/claim.c
> @@ -200,11 +200,10 @@ ssize_t nd_namespace_store(struct device *dev,
>  		}
>  		break;
>  	default:
>  		len = -EBUSY;
>  		goto out_attach;
> -		break;
>  	}
>  
>  	if (__nvdimm_namespace_capacity(ndns) < SZ_16M) {
>  		dev_dbg(dev, "%s too small to host\n", name);
>  		len = -ENXIO;
> diff --git a/drivers/pci/controller/pci-v3-semi.c b/drivers/pci/controller/pci-v3-semi.c
> index 1f54334f09f7..154a5398633c 100644
> --- a/drivers/pci/controller/pci-v3-semi.c
> +++ b/drivers/pci/controller/pci-v3-semi.c
> @@ -656,11 +656,10 @@ static int v3_get_dma_range_config(struct v3_pci *v3,
>  		val |= V3_LB_BASE_ADR_SIZE_2GB;
>  		break;
>  	default:
>  		dev_err(v3->dev, "illegal dma memory chunk size\n");
>  		return -EINVAL;
> -		break;
>  	}
>  	val |= V3_PCI_MAP_M_REG_EN | V3_PCI_MAP_M_ENABLE;
>  	*pci_map = val;
>  
>  	dev_dbg(dev,
> diff --git a/drivers/pinctrl/samsung/pinctrl-s3c24xx.c b/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
> index 5e24838a582f..2223ead5bd72 100644
> --- a/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
> +++ b/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
> @@ -106,23 +106,18 @@ struct s3c24xx_eint_domain_data {
>  static int s3c24xx_eint_get_trigger(unsigned int type)
>  {
>  	switch (type) {
>  	case IRQ_TYPE_EDGE_RISING:
>  		return EINT_EDGE_RISING;
> -		break;
>  	case IRQ_TYPE_EDGE_FALLING:
>  		return EINT_EDGE_FALLING;
> -		break;
>  	case IRQ_TYPE_EDGE_BOTH:
>  		return EINT_EDGE_BOTH;
> -		break;
>  	case IRQ_TYPE_LEVEL_HIGH:
>  		return EINT_LEVEL_HIGH;
> -		break;
>  	case IRQ_TYPE_LEVEL_LOW:
>  		return EINT_LEVEL_LOW;
> -		break;
>  	default:
>  		return -EINVAL;
>  	}
>  }
>  
> diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
> index 49f4b73be513..1c2084c74a57 100644
> --- a/drivers/platform/x86/acer-wmi.c
> +++ b/drivers/platform/x86/acer-wmi.c
> @@ -790,11 +790,10 @@ static acpi_status AMW0_set_u32(u32 value, u32 cap)
>  		if (value > max_brightness)
>  			return AE_BAD_PARAMETER;
>  		switch (quirks->brightness) {
>  		default:
>  			return ec_write(0x83, value);
> -			break;
>  		}
>  	default:
>  		return AE_ERROR;
>  	}
>  
> diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
> index e5a1b5533408..704813374922 100644
> --- a/drivers/platform/x86/sony-laptop.c
> +++ b/drivers/platform/x86/sony-laptop.c
> @@ -2465,26 +2465,23 @@ static int __sony_nc_gfx_switch_status_get(void)
>  	case 0x0146:
>  		/* 1: discrete GFX (speed)
>  		 * 0: integrated GFX (stamina)
>  		 */
>  		return result & 0x1 ? SPEED : STAMINA;
> -		break;
>  	case 0x015B:
>  		/* 0: discrete GFX (speed)
>  		 * 1: integrated GFX (stamina)
>  		 */
>  		return result & 0x1 ? STAMINA : SPEED;
> -		break;
>  	case 0x0128:
>  		/* it's a more elaborated bitmask, for now:
>  		 * 2: integrated GFX (stamina)
>  		 * 0: discrete GFX (speed)
>  		 */
>  		dprintk("GFX Status: 0x%x\n", result);
>  		return result & 0x80 ? AUTO :
>  			result & 0x02 ? STAMINA : SPEED;
> -		break;
>  	}
>  	return -EINVAL;
>  }
>  
>  static ssize_t sony_nc_gfx_switch_status_show(struct device *dev,
> diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
> index d88f388a3450..44e802f9f1b4 100644
> --- a/drivers/platform/x86/wmi.c
> +++ b/drivers/platform/x86/wmi.c
> @@ -1258,17 +1258,14 @@ acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
>  	}
>  
>  	switch (result) {
>  	case -EINVAL:
>  		return AE_BAD_PARAMETER;
> -		break;
>  	case -ENODEV:
>  		return AE_NOT_FOUND;
> -		break;
>  	case -ETIME:
>  		return AE_TIME;
> -		break;
>  	default:
>  		return AE_OK;
>  	}
>  }
>  
> diff --git a/drivers/power/supply/wm831x_power.c b/drivers/power/supply/wm831x_power.c
> index 18b33f14dfee..4cd2dd870039 100644
> --- a/drivers/power/supply/wm831x_power.c
> +++ b/drivers/power/supply/wm831x_power.c
> @@ -666,11 +666,10 @@ static int wm831x_power_probe(struct platform_device *pdev)
>  	default:
>  		dev_err(&pdev->dev, "Failed to find USB phy: %d\n", ret);
>  		fallthrough;
>  	case -EPROBE_DEFER:
>  		goto err_bat_irq;
> -		break;
>  	}
>  
>  	return ret;
>  
>  err_bat_irq:
> diff --git a/drivers/scsi/aic94xx/aic94xx_task.c b/drivers/scsi/aic94xx/aic94xx_task.c
> index f923ed019d4a..ed034192b3c3 100644
> --- a/drivers/scsi/aic94xx/aic94xx_task.c
> +++ b/drivers/scsi/aic94xx/aic94xx_task.c
> @@ -267,11 +267,10 @@ static void asd_task_tasklet_complete(struct asd_ascb *ascb,
>  		ts->stat = SAS_NAK_R_ERR;
>  		break;
>  	case TA_I_T_NEXUS_LOSS:
>  		opcode = dl->status_block[0];
>  		goto Again;
> -		break;
>  	case TF_INV_CONN_HANDLE:
>  		ts->resp = SAS_TASK_UNDELIVERED;
>  		ts->stat = SAS_DEVICE_UNKNOWN;
>  		break;
>  	case TF_REQUESTED_N_PENDING:
> diff --git a/drivers/scsi/be2iscsi/be_mgmt.c b/drivers/scsi/be2iscsi/be_mgmt.c
> index 96d6e384b2b2..0d4928567265 100644
> --- a/drivers/scsi/be2iscsi/be_mgmt.c
> +++ b/drivers/scsi/be2iscsi/be_mgmt.c
> @@ -1242,22 +1242,18 @@ beiscsi_adap_family_disp(struct device *dev, struct device_attribute *attr,
>  	case BE_DEVICE_ID1:
>  	case OC_DEVICE_ID1:
>  	case OC_DEVICE_ID2:
>  		return snprintf(buf, PAGE_SIZE,
>  				"Obsolete/Unsupported BE2 Adapter Family\n");
> -		break;
>  	case BE_DEVICE_ID2:
>  	case OC_DEVICE_ID3:
>  		return snprintf(buf, PAGE_SIZE, "BE3-R Adapter Family\n");
> -		break;
>  	case OC_SKH_ID1:
>  		return snprintf(buf, PAGE_SIZE, "Skyhawk-R Adapter Family\n");
> -		break;
>  	default:
>  		return snprintf(buf, PAGE_SIZE,
>  				"Unknown Adapter Family: 0x%x\n", dev_id);
> -		break;
>  	}
>  }
>  
>  /**
>   * beiscsi_phys_port()- Display Physical Port Identifier
> diff --git a/drivers/scsi/bnx2fc/bnx2fc_hwi.c b/drivers/scsi/bnx2fc/bnx2fc_hwi.c
> index 08992095ce7a..b37b0a9ec12d 100644
> --- a/drivers/scsi/bnx2fc/bnx2fc_hwi.c
> +++ b/drivers/scsi/bnx2fc/bnx2fc_hwi.c
> @@ -768,11 +768,10 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
>  				if (rc)
>  					goto skip_rec;
>  			} else
>  				printk(KERN_ERR PFX "SRR in progress\n");
>  			goto ret_err_rqe;
> -			break;
>  		default:
>  			break;
>  		}
>  
>  skip_rec:
> diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
> index 0f9274960dc6..a4be6f439c47 100644
> --- a/drivers/scsi/fcoe/fcoe.c
> +++ b/drivers/scsi/fcoe/fcoe.c
> @@ -1892,11 +1892,10 @@ static int fcoe_device_notification(struct notifier_block *notifier,
>  			fcoe_interface_remove(fcoe);
>  		fcoe_interface_cleanup(fcoe);
>  		mutex_unlock(&fcoe_config_mutex);
>  		fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr));
>  		goto out;
> -		break;
>  	case NETDEV_FEAT_CHANGE:
>  		fcoe_netdev_features_change(lport, netdev);
>  		break;
>  	default:
>  		FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
> diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
> index 83ce4f11a589..45136e3a4efc 100644
> --- a/drivers/scsi/hpsa.c
> +++ b/drivers/scsi/hpsa.c
> @@ -7440,11 +7440,10 @@ static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
>  				break;
>  			default:	/* reserved in PCI 2.2 */
>  				dev_warn(&pdev->dev,
>  				       "base address is invalid\n");
>  				return -1;
> -				break;
>  			}
>  		}
>  		if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
>  			return i + 1;
>  	}
> diff --git a/drivers/scsi/hptiop.c b/drivers/scsi/hptiop.c
> index 6a2561f26e38..db4c7a7ff4dd 100644
> --- a/drivers/scsi/hptiop.c
> +++ b/drivers/scsi/hptiop.c
> @@ -756,11 +756,10 @@ static void hptiop_finish_scsi_req(struct hptiop_hba *hba, u32 tag,
>  		scsi_set_resid(scp,
>  			scsi_bufflen(scp) - le32_to_cpu(req->dataxfer_length));
>  		scp->result = SAM_STAT_CHECK_CONDITION;
>  		memcpy(scp->sense_buffer, &req->sg_list, SCSI_SENSE_BUFFERSIZE);
>  		goto skip_resid;
> -		break;
>  
>  	default:
>  		scp->result = DRIVER_INVALID << 24 | DID_ABORT << 16;
>  		break;
>  	}
> diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
> index b0aa58d117cc..e451102b9a29 100644
> --- a/drivers/scsi/ipr.c
> +++ b/drivers/scsi/ipr.c
> @@ -9485,11 +9485,10 @@ static pci_ers_result_t ipr_pci_error_detected(struct pci_dev *pdev,
>  		ipr_pci_frozen(pdev);
>  		return PCI_ERS_RESULT_CAN_RECOVER;
>  	case pci_channel_io_perm_failure:
>  		ipr_pci_perm_failure(pdev);
>  		return PCI_ERS_RESULT_DISCONNECT;
> -		break;
>  	default:
>  		break;
>  	}
>  	return PCI_ERS_RESULT_NEED_RESET;
>  }
> diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
> index 7041e2e3ab48..1b87d9080ebe 100644
> --- a/drivers/scsi/isci/phy.c
> +++ b/drivers/scsi/isci/phy.c
> @@ -751,11 +751,10 @@ enum sci_status sci_phy_event_handler(struct isci_phy *iphy, u32 event_code)
>  		       sci_change_state(&iphy->sm, SCI_PHY_STARTING);
>  		       break;
>  		default:
>  			phy_event_warn(iphy, state, event_code);
>  			return SCI_FAILURE;
> -			break;
>  		}
>  		return SCI_SUCCESS;
>  	case SCI_PHY_SUB_AWAIT_IAF_UF:
>  		switch (scu_get_event_code(event_code)) {
>  		case SCU_EVENT_SAS_PHY_DETECTED:
> @@ -956,11 +955,10 @@ enum sci_status sci_phy_event_handler(struct isci_phy *iphy, u32 event_code)
>  			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
>  			break;
>  		default:
>  			phy_event_warn(iphy, state, event_code);
>  			return SCI_FAILURE_INVALID_STATE;
> -			break;
>  		}
>  		return SCI_SUCCESS;
>  	default:
>  		dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
>  			__func__, phy_state_name(state));
> diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
> index c9a327b13e5c..325081ac6553 100644
> --- a/drivers/scsi/lpfc/lpfc_debugfs.c
> +++ b/drivers/scsi/lpfc/lpfc_debugfs.c
> @@ -3339,11 +3339,10 @@ lpfc_idiag_pcicfg_read(struct file *file, char __user *buf, size_t nbytes,
>  		len += scnprintf(pbuffer+len, LPFC_PCI_CFG_SIZE-len,
>  				"%03x: %08x\n", where, u32val);
>  		break;
>  	case LPFC_PCI_CFG_BROWSE: /* browse all */
>  		goto pcicfg_browse;
> -		break;
>  	default:
>  		/* illegal count */
>  		len = 0;
>  		break;
>  	}
> @@ -4379,11 +4378,11 @@ lpfc_idiag_queacc_write(struct file *file, const char __user *buf,
>  					goto pass_check;
>  				}
>  			}
>  		}
>  		goto error_out;
> -		break;
> +
>  	case LPFC_IDIAG_CQ:
>  		/* MBX complete queue */
>  		if (phba->sli4_hba.mbx_cq &&
>  		    phba->sli4_hba.mbx_cq->queue_id == queid) {
>  			/* Sanity check */
> @@ -4431,11 +4430,11 @@ lpfc_idiag_queacc_write(struct file *file, const char __user *buf,
>  					goto pass_check;
>  				}
>  			}
>  		}
>  		goto error_out;
> -		break;
> +
>  	case LPFC_IDIAG_MQ:
>  		/* MBX work queue */
>  		if (phba->sli4_hba.mbx_wq &&
>  		    phba->sli4_hba.mbx_wq->queue_id == queid) {
>  			/* Sanity check */
> @@ -4445,11 +4444,11 @@ lpfc_idiag_queacc_write(struct file *file, const char __user *buf,
>  				goto error_out;
>  			idiag.ptr_private = phba->sli4_hba.mbx_wq;
>  			goto pass_check;
>  		}
>  		goto error_out;
> -		break;
> +
>  	case LPFC_IDIAG_WQ:
>  		/* ELS work queue */
>  		if (phba->sli4_hba.els_wq &&
>  		    phba->sli4_hba.els_wq->queue_id == queid) {
>  			/* Sanity check */
> @@ -4485,13 +4484,12 @@ lpfc_idiag_queacc_write(struct file *file, const char __user *buf,
>  					idiag.ptr_private = qp;
>  					goto pass_check;
>  				}
>  			}
>  		}
> -
>  		goto error_out;
> -		break;
> +
>  	case LPFC_IDIAG_RQ:
>  		/* HDR queue */
>  		if (phba->sli4_hba.hdr_rq &&
>  		    phba->sli4_hba.hdr_rq->queue_id == queid) {
>  			/* Sanity check */
> @@ -4512,14 +4510,12 @@ lpfc_idiag_queacc_write(struct file *file, const char __user *buf,
>  				goto error_out;
>  			idiag.ptr_private = phba->sli4_hba.dat_rq;
>  			goto pass_check;
>  		}
>  		goto error_out;
> -		break;
>  	default:
>  		goto error_out;
> -		break;
>  	}
>  
>  pass_check:
>  
>  	if (idiag.cmd.opcode == LPFC_IDIAG_CMD_QUEACC_RD) {
> diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
> index ca25e54bb782..b6090357e8a5 100644
> --- a/drivers/scsi/lpfc/lpfc_init.c
> +++ b/drivers/scsi/lpfc/lpfc_init.c
> @@ -7194,11 +7194,10 @@ lpfc_init_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
>  	default:
>  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
>  				"1431 Invalid HBA PCI-device group: 0x%x\n",
>  				dev_grp);
>  		return -ENODEV;
> -		break;
>  	}
>  	return 0;
>  }
>  
>  /**
> diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
> index 983eeb0e3d07..c3b02dab6e5c 100644
> --- a/drivers/scsi/lpfc/lpfc_scsi.c
> +++ b/drivers/scsi/lpfc/lpfc_scsi.c
> @@ -4282,11 +4282,10 @@ lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
>  	default:
>  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
>  				"1418 Invalid HBA PCI-device group: 0x%x\n",
>  				dev_grp);
>  		return -ENODEV;
> -		break;
>  	}
>  	phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
>  	phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
>  	return 0;
>  }
> diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
> index e158cd77d387..0f18f1ba8a28 100644
> --- a/drivers/scsi/lpfc/lpfc_sli.c
> +++ b/drivers/scsi/lpfc/lpfc_sli.c
> @@ -9187,11 +9187,10 @@ lpfc_mbox_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
>  	default:
>  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
>  				"1420 Invalid HBA PCI-device group: 0x%x\n",
>  				dev_grp);
>  		return -ENODEV;
> -		break;
>  	}
>  	return 0;
>  }
>  
>  /**
> @@ -10070,11 +10069,10 @@ lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
>  	default:
>  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
>  				"2014 Invalid command 0x%x\n",
>  				iocbq->iocb.ulpCommand);
>  		return IOCB_ERROR;
> -		break;
>  	}
>  
>  	if (iocbq->iocb_flag & LPFC_IO_DIF_PASS)
>  		bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_PASSTHRU);
>  	else if (iocbq->iocb_flag & LPFC_IO_DIF_STRIP)
> @@ -10232,11 +10230,10 @@ lpfc_sli_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
>  	default:
>  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
>  				"1419 Invalid HBA PCI-device group: 0x%x\n",
>  				dev_grp);
>  		return -ENODEV;
> -		break;
>  	}
>  	phba->lpfc_get_iocb_from_iocbq = lpfc_get_iocb_from_iocbq;
>  	return 0;
>  }
>  
> diff --git a/drivers/scsi/mvumi.c b/drivers/scsi/mvumi.c
> index 0354898d7cac..2f7a52bd653a 100644
> --- a/drivers/scsi/mvumi.c
> +++ b/drivers/scsi/mvumi.c
> @@ -2294,11 +2294,10 @@ static int mvumi_cfg_hw_reg(struct mvumi_hba *mhba)
>  		regs->int_drbl_int_mask     = 0x3FFFFFFF;
>  		regs->int_mu = regs->int_dl_cpu2pciea | regs->int_comaout;
>  		break;
>  	default:
>  		return -1;
> -		break;
>  	}
>  
>  	return 0;
>  }
>  
> diff --git a/drivers/scsi/pcmcia/nsp_cs.c b/drivers/scsi/pcmcia/nsp_cs.c
> index bc5a623519e7..bb3b3884f968 100644
> --- a/drivers/scsi/pcmcia/nsp_cs.c
> +++ b/drivers/scsi/pcmcia/nsp_cs.c
> @@ -1100,12 +1100,10 @@ static irqreturn_t nspintr(int irq, void *dev_id)
>  		nsp_index_write(base, SCSIBUSCTRL, SCSI_ATN);
>  		udelay(1);
>  		nsp_index_write(base, SCSIBUSCTRL, SCSI_ATN | AUTODIRECTION | ACKENB);
>  		return IRQ_HANDLED;
>  
> -		break;
> -
>  	case PH_RESELECT:
>  		//nsp_dbg(NSP_DEBUG_INTR, "phase reselect");
>  		// *sync_neg = SYNC_NOT_YET;
>  		if ((phase & BUSMON_PHASE_MASK) != BUSPHASE_MESSAGE_IN) {
>  
> diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
> index 07afd0d8a8f3..40af7f1524ce 100644
> --- a/drivers/scsi/qla2xxx/qla_mbx.c
> +++ b/drivers/scsi/qla2xxx/qla_mbx.c
> @@ -4028,11 +4028,10 @@ qla24xx_report_id_acquisition(scsi_qla_host_t *vha,
>  
>  			/* if our portname is higher then initiate N2N login */
>  
>  			set_bit(N2N_LOGIN_NEEDED, &vha->dpc_flags);
>  			return;
> -			break;
>  		case TOPO_FL:
>  			ha->current_topology = ISP_CFG_FL;
>  			break;
>  		case TOPO_F:
>  			ha->current_topology = ISP_CFG_F;
> diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
> index e2e5356a997d..43f7624508a9 100644
> --- a/drivers/scsi/st.c
> +++ b/drivers/scsi/st.c
> @@ -2844,11 +2844,10 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
>  		fileno = blkno = at_sm = 0;
>  		break;
>  	case MTNOP:
>  		DEBC_printk(STp, "No op on tape.\n");
>  		return 0;	/* Should do something ? */
> -		break;
>  	case MTRETEN:
>  		cmd[0] = START_STOP;
>  		if (STp->immediate) {
>  			cmd[1] = 1;	/* Don't wait for completion */
>  			timeout = STp->device->request_queue->rq_timeout;
> diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c b/drivers/scsi/sym53c8xx_2/sym_hipd.c
> index a9fe092a4906..255a2d48d421 100644
> --- a/drivers/scsi/sym53c8xx_2/sym_hipd.c
> +++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c
> @@ -4594,11 +4594,10 @@ static void sym_int_sir(struct sym_hcb *np)
>  				sym_print_addr(cp->cmd,
>  					"M_REJECT received (%x:%x).\n",
>  					scr_to_cpu(np->lastmsg), np->msgout[0]);
>  			}
>  			goto out_clrack;
> -			break;
>  		default:
>  			goto out_reject;
>  		}
>  		break;
>  	/*
> diff --git a/drivers/staging/media/atomisp/pci/sh_css.c b/drivers/staging/media/atomisp/pci/sh_css.c
> index ddee04c8248d..eab7a048ca7a 100644
> --- a/drivers/staging/media/atomisp/pci/sh_css.c
> +++ b/drivers/staging/media/atomisp/pci/sh_css.c
> @@ -6284,11 +6284,10 @@ allocate_delay_frames(struct ia_css_pipe *pipe) {
>  	case IA_CSS_PIPE_ID_CAPTURE: {
>  		struct ia_css_capture_settings *mycs_capture = &pipe->pipe_settings.capture;
>  		(void)mycs_capture;
>  		return err;
>  	}
> -	break;
>  	case IA_CSS_PIPE_ID_VIDEO: {
>  		struct ia_css_video_settings *mycs_video = &pipe->pipe_settings.video;
>  
>  		ref_info = mycs_video->video_binary.internal_frame_info;
>  		/*The ref frame expects
> diff --git a/drivers/staging/rts5208/rtsx_scsi.c b/drivers/staging/rts5208/rtsx_scsi.c
> index 1deb74112ad4..672248be7bf3 100644
> --- a/drivers/staging/rts5208/rtsx_scsi.c
> +++ b/drivers/staging/rts5208/rtsx_scsi.c
> @@ -569,12 +569,10 @@ static int start_stop_unit(struct scsi_cmnd *srb, struct rtsx_chip *chip)
>  	case LOAD_MEDIUM:
>  		if (check_card_ready(chip, lun))
>  			return TRANSPORT_GOOD;
>  		set_sense_type(chip, lun, SENSE_TYPE_MEDIA_NOT_PRESENT);
>  		return TRANSPORT_FAILED;
> -
> -		break;
>  	}
>  
>  	return TRANSPORT_ERROR;
>  }
>  
> diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c
> index fd0ea4dbcb91..7c7d3858e6ca 100644
> --- a/drivers/staging/vme/devices/vme_user.c
> +++ b/drivers/staging/vme/devices/vme_user.c
> @@ -355,12 +355,10 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
>  			 *	to userspace as they are
>  			 */
>  			return vme_master_set(image[minor].resource,
>  				master.enable, master.vme_addr, master.size,
>  				master.aspace, master.cycle, master.dwidth);
> -
> -			break;
>  		}
>  		break;
>  	case SLAVE_MINOR:
>  		switch (cmd) {
>  		case VME_GET_SLAVE:
> @@ -396,12 +394,10 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
>  			 */
>  			return vme_slave_set(image[minor].resource,
>  				slave.enable, slave.vme_addr, slave.size,
>  				image[minor].pci_buf, slave.aspace,
>  				slave.cycle);
> -
> -			break;
>  		}
>  		break;
>  	}
>  
>  	return -EINVAL;
> diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
> index d42b854cb7df..861e95043191 100644
> --- a/drivers/tty/nozomi.c
> +++ b/drivers/tty/nozomi.c
> @@ -412,15 +412,13 @@ static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
>  	switch (size_bytes) {
>  	case 2:	/* 2 bytes */
>  		buf16 = (u16 *) buf;
>  		*buf16 = __le16_to_cpu(readw(ptr));
>  		goto out;
> -		break;
>  	case 4:	/* 4 bytes */
>  		*(buf) = __le32_to_cpu(readl(ptr));
>  		goto out;
> -		break;
>  	}
>  
>  	while (i < size_bytes) {
>  		if (size_bytes - i == 2) {
>  			/* Handle 2 bytes in the end */
> @@ -458,19 +456,18 @@ static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
>  	switch (size_bytes) {
>  	case 2:	/* 2 bytes */
>  		buf16 = (const u16 *)buf;
>  		writew(__cpu_to_le16(*buf16), ptr);
>  		return 2;
> -		break;
>  	case 1: /*
>  		 * also needs to write 4 bytes in this case
>  		 * so falling through..
>  		 */
> +		fallthrough;
>  	case 4: /* 4 bytes */
>  		writel(__cpu_to_le32(*buf), ptr);
>  		return 4;
> -		break;
>  	}
>  
>  	while (i < size_bytes) {
>  		if (size_bytes - i == 2) {
>  			/* 2 bytes */
> diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
> index 1731d9728865..09703079db7b 100644
> --- a/drivers/tty/serial/imx.c
> +++ b/drivers/tty/serial/imx.c
> @@ -318,31 +318,26 @@ static void imx_uart_writel(struct imx_port *sport, u32 val, u32 offset)
>  static u32 imx_uart_readl(struct imx_port *sport, u32 offset)
>  {
>  	switch (offset) {
>  	case UCR1:
>  		return sport->ucr1;
> -		break;
>  	case UCR2:
>  		/*
>  		 * UCR2_SRST is the only bit in the cached registers that might
>  		 * differ from the value that was last written. As it only
>  		 * automatically becomes one after being cleared, reread
>  		 * conditionally.
>  		 */
>  		if (!(sport->ucr2 & UCR2_SRST))
>  			sport->ucr2 = readl(sport->port.membase + offset);
>  		return sport->ucr2;
> -		break;
>  	case UCR3:
>  		return sport->ucr3;
> -		break;
>  	case UCR4:
>  		return sport->ucr4;
> -		break;
>  	case UFCR:
>  		return sport->ufcr;
> -		break;
>  	default:
>  		return readl(sport->port.membase + offset);
>  	}
>  }
>  
> diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
> index 1125f4715830..5204769834d1 100644
> --- a/drivers/usb/gadget/function/f_hid.c
> +++ b/drivers/usb/gadget/function/f_hid.c
> @@ -509,27 +509,23 @@ static int hidg_setup(struct usb_function *f,
>  		VDBG(cdev, "get_report\n");
>  
>  		/* send an empty report */
>  		length = min_t(unsigned, length, hidg->report_length);
>  		memset(req->buf, 0x0, length);
> -
>  		goto respond;
> -		break;
>  
>  	case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
>  		  | HID_REQ_GET_PROTOCOL):
>  		VDBG(cdev, "get_protocol\n");
>  		length = min_t(unsigned int, length, 1);
>  		((u8 *) req->buf)[0] = hidg->protocol;
>  		goto respond;
> -		break;
>  
>  	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
>  		  | HID_REQ_SET_REPORT):
>  		VDBG(cdev, "set_report | wLength=%d\n", ctrl->wLength);
>  		goto stall;
> -		break;
>  
>  	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
>  		  | HID_REQ_SET_PROTOCOL):
>  		VDBG(cdev, "set_protocol\n");
>  		if (value > HID_REPORT_PROTOCOL)
> @@ -542,11 +538,10 @@ static int hidg_setup(struct usb_function *f,
>  		if (hidg->bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
>  			hidg->protocol = value;
>  			goto respond;
>  		}
>  		goto stall;
> -		break;
>  
>  	case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8
>  		  | USB_REQ_GET_DESCRIPTOR):
>  		switch (value >> 8) {
>  		case HID_DT_HID:
> @@ -560,33 +555,29 @@ static int hidg_setup(struct usb_function *f,
>  
>  			length = min_t(unsigned short, length,
>  						   hidg_desc_copy.bLength);
>  			memcpy(req->buf, &hidg_desc_copy, length);
>  			goto respond;
> -			break;
>  		}
>  		case HID_DT_REPORT:
>  			VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: REPORT\n");
>  			length = min_t(unsigned short, length,
>  						   hidg->report_desc_length);
>  			memcpy(req->buf, hidg->report_desc, length);
>  			goto respond;
> -			break;
>  
>  		default:
>  			VDBG(cdev, "Unknown descriptor request 0x%x\n",
>  				 value >> 8);
>  			goto stall;
> -			break;
>  		}
>  		break;
>  
>  	default:
>  		VDBG(cdev, "Unknown request 0x%x\n",
>  			 ctrl->bRequest);
>  		goto stall;
> -		break;
>  	}
>  
>  stall:
>  	return -EOPNOTSUPP;
>  
> diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
> index fe405cd38dbc..b46ef45c4d25 100644
> --- a/drivers/usb/host/xhci-mem.c
> +++ b/drivers/usb/host/xhci-mem.c
> @@ -1142,11 +1142,10 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
>  		max_packets = MAX_PACKET(8);
>  		break;
>  	case USB_SPEED_WIRELESS:
>  		xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n");
>  		return -EINVAL;
> -		break;
>  	default:
>  		/* Speed was set earlier, this shouldn't happen. */
>  		return -EINVAL;
>  	}
>  	/* Find the root hub port this device is under */
> diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
> index 70ec29681526..efbd317f2f25 100644
> --- a/drivers/usb/misc/iowarrior.c
> +++ b/drivers/usb/misc/iowarrior.c
> @@ -382,11 +382,10 @@ static ssize_t iowarrior_write(struct file *file,
>  			goto exit;
>  		}
>  		retval = usb_set_report(dev->interface, 2, 0, buf, count);
>  		kfree(buf);
>  		goto exit;
> -		break;
>  	case USB_DEVICE_ID_CODEMERCS_IOW56:
>  	case USB_DEVICE_ID_CODEMERCS_IOW56AM:
>  	case USB_DEVICE_ID_CODEMERCS_IOW28:
>  	case USB_DEVICE_ID_CODEMERCS_IOW28L:
>  	case USB_DEVICE_ID_CODEMERCS_IOW100:
> @@ -452,18 +451,16 @@ static ssize_t iowarrior_write(struct file *file,
>  		}
>  		/* submit was ok */
>  		retval = count;
>  		usb_free_urb(int_out_urb);
>  		goto exit;
> -		break;
>  	default:
>  		/* what do we have here ? An unsupported Product-ID ? */
>  		dev_err(&dev->interface->dev, "%s - not supported for product=0x%x\n",
>  			__func__, dev->product_id);
>  		retval = -EFAULT;
>  		goto exit;
> -		break;
>  	}
>  error:
>  	usb_free_coherent(dev->udev, dev->report_size, buf,
>  			  int_out_urb->transfer_dma);
>  error_no_buffer:
> diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
> index b4ba79123d9d..f1201d4de297 100644
> --- a/drivers/usb/serial/iuu_phoenix.c
> +++ b/drivers/usb/serial/iuu_phoenix.c
> @@ -848,11 +848,10 @@ static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
>  		dataout[DataCount++] = 0x04;
>  		break;
>  	default:
>  		kfree(dataout);
>  		return IUU_INVALID_PARAMETER;
> -		break;
>  	}
>  
>  	switch (parity & 0xF0) {
>  	case IUU_ONE_STOP_BIT:
>  		dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
> @@ -862,11 +861,10 @@ static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
>  		dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
>  		break;
>  	default:
>  		kfree(dataout);
>  		return IUU_INVALID_PARAMETER;
> -		break;
>  	}
>  
>  	status = bulk_immediate(port, dataout, DataCount);
>  	if (status != IUU_OPERATION_OK)
>  		dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
> diff --git a/drivers/usb/storage/freecom.c b/drivers/usb/storage/freecom.c
> index 3d5f7d0ff0f1..2b098b55c4cb 100644
> --- a/drivers/usb/storage/freecom.c
> +++ b/drivers/usb/storage/freecom.c
> @@ -429,11 +429,10 @@ static int freecom_transport(struct scsi_cmnd *srb, struct us_data *us)
>  		/* should never hit here -- filtered in usb.c */
>  		usb_stor_dbg(us, "freecom unimplemented direction: %d\n",
>  			     us->srb->sc_data_direction);
>  		/* Return fail, SCSI seems to handle this better. */
>  		return USB_STOR_TRANSPORT_FAILED;
> -		break;
>  	}
>  
>  	return USB_STOR_TRANSPORT_GOOD;
>  }
>  
> diff --git a/drivers/vme/bridges/vme_tsi148.c b/drivers/vme/bridges/vme_tsi148.c
> index 50ae26977a02..1227ea937059 100644
> --- a/drivers/vme/bridges/vme_tsi148.c
> +++ b/drivers/vme/bridges/vme_tsi148.c
> @@ -504,11 +504,10 @@ static int tsi148_slave_set(struct vme_slave_resource *image, int enabled,
>  		addr |= TSI148_LCSR_ITAT_AS_A64;
>  		break;
>  	default:
>  		dev_err(tsi148_bridge->parent, "Invalid address space\n");
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	/* Convert 64-bit variables to 2x 32-bit variables */
>  	reg_split(vme_base, &vme_base_high, &vme_base_low);
>  
> @@ -993,11 +992,10 @@ static int tsi148_master_set(struct vme_master_resource *image, int enabled,
>  	default:
>  		spin_unlock(&image->lock);
>  		dev_err(tsi148_bridge->parent, "Invalid address space\n");
>  		retval = -EINVAL;
>  		goto err_aspace;
> -		break;
>  	}
>  
>  	temp_ctl &= ~(3<<4);
>  	if (cycle & VME_SUPER)
>  		temp_ctl |= TSI148_LCSR_OTAT_SUP;
> @@ -1501,11 +1499,10 @@ static int tsi148_dma_set_vme_src_attributes(struct device *dev, __be32 *attr,
>  		val |= TSI148_LCSR_DSAT_AMODE_USER4;
>  		break;
>  	default:
>  		dev_err(dev, "Invalid address space\n");
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	if (cycle & VME_SUPER)
>  		val |= TSI148_LCSR_DSAT_SUP;
>  	if (cycle & VME_PROG)
> @@ -1601,11 +1598,10 @@ static int tsi148_dma_set_vme_dest_attributes(struct device *dev, __be32 *attr,
>  		val |= TSI148_LCSR_DDAT_AMODE_USER4;
>  		break;
>  	default:
>  		dev_err(dev, "Invalid address space\n");
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	if (cycle & VME_SUPER)
>  		val |= TSI148_LCSR_DDAT_SUP;
>  	if (cycle & VME_PROG)
> @@ -1699,11 +1695,10 @@ static int tsi148_dma_list_add(struct vme_dma_list *list,
>  		break;
>  	default:
>  		dev_err(tsi148_bridge->parent, "Invalid source type\n");
>  		retval = -EINVAL;
>  		goto err_source;
> -		break;
>  	}
>  
>  	/* Assume last link - this will be over-written by adding another */
>  	entry->descriptor.dnlau = cpu_to_be32(0);
>  	entry->descriptor.dnlal = cpu_to_be32(TSI148_LCSR_DNLAL_LLA);
> @@ -1736,11 +1731,10 @@ static int tsi148_dma_list_add(struct vme_dma_list *list,
>  		break;
>  	default:
>  		dev_err(tsi148_bridge->parent, "Invalid destination type\n");
>  		retval = -EINVAL;
>  		goto err_dest;
> -		break;
>  	}
>  
>  	/* Fill out count */
>  	entry->descriptor.dcnt = cpu_to_be32((u32)count);
>  
> @@ -1962,11 +1956,10 @@ static int tsi148_lm_set(struct vme_lm_resource *lm, unsigned long long lm_base,
>  		break;
>  	default:
>  		mutex_unlock(&lm->mtx);
>  		dev_err(tsi148_bridge->parent, "Invalid address space\n");
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	if (cycle & VME_SUPER)
>  		lm_ctl |= TSI148_LCSR_LMAT_SUPR ;
>  	if (cycle & VME_USER)
> diff --git a/drivers/vme/vme.c b/drivers/vme/vme.c
> index b398293980b6..e1a940e43327 100644
> --- a/drivers/vme/vme.c
> +++ b/drivers/vme/vme.c
> @@ -50,27 +50,22 @@ static struct vme_bridge *find_bridge(struct vme_resource *resource)
>  	/* Get list to search */
>  	switch (resource->type) {
>  	case VME_MASTER:
>  		return list_entry(resource->entry, struct vme_master_resource,
>  			list)->parent;
> -		break;
>  	case VME_SLAVE:
>  		return list_entry(resource->entry, struct vme_slave_resource,
>  			list)->parent;
> -		break;
>  	case VME_DMA:
>  		return list_entry(resource->entry, struct vme_dma_resource,
>  			list)->parent;
> -		break;
>  	case VME_LM:
>  		return list_entry(resource->entry, struct vme_lm_resource,
>  			list)->parent;
> -		break;
>  	default:
>  		printk(KERN_ERR "Unknown resource type\n");
>  		return NULL;
> -		break;
>  	}
>  }
>  
>  /**
>   * vme_free_consistent - Allocate contiguous memory.
> @@ -177,26 +172,22 @@ size_t vme_get_size(struct vme_resource *resource)
>  			&aspace, &cycle, &dwidth);
>  		if (retval)
>  			return 0;
>  
>  		return size;
> -		break;
>  	case VME_SLAVE:
>  		retval = vme_slave_get(resource, &enabled, &base, &size,
>  			&buf_base, &aspace, &cycle);
>  		if (retval)
>  			return 0;
>  
>  		return size;
> -		break;
>  	case VME_DMA:
>  		return 0;
> -		break;
>  	default:
>  		printk(KERN_ERR "Unknown resource type\n");
>  		return 0;
> -		break;
>  	}
>  }
>  EXPORT_SYMBOL(vme_get_size);
>  
>  int vme_check_window(u32 aspace, unsigned long long vme_base,
> diff --git a/drivers/watchdog/geodewdt.c b/drivers/watchdog/geodewdt.c
> index 83418924e30a..0b699c783d57 100644
> --- a/drivers/watchdog/geodewdt.c
> +++ b/drivers/watchdog/geodewdt.c
> @@ -148,12 +148,10 @@ static long geodewdt_ioctl(struct file *file, unsigned int cmd,
>  
>  	switch (cmd) {
>  	case WDIOC_GETSUPPORT:
>  		return copy_to_user(argp, &ident,
>  				    sizeof(ident)) ? -EFAULT : 0;
> -		break;
> -
>  	case WDIOC_GETSTATUS:
>  	case WDIOC_GETBOOTSTATUS:
>  		return put_user(0, p);
>  
>  	case WDIOC_SETOPTIONS:
> diff --git a/fs/efs/inode.c b/fs/efs/inode.c
> index 89e73a6f0d36..64f3a54a0f72 100644
> --- a/fs/efs/inode.c
> +++ b/fs/efs/inode.c
> @@ -161,11 +161,10 @@ struct inode *efs_iget(struct super_block *super, unsigned long ino)
>  			init_special_inode(inode, inode->i_mode, device);
>  			break;
>  		default:
>  			pr_warn("unsupported inode mode %o\n", inode->i_mode);
>  			goto read_inode_error;
> -			break;
>  	}
>  
>  	unlock_new_inode(inode);
>  	return inode;
>          
> diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
> index 79a231719460..3bd8119bed5e 100644
> --- a/fs/ocfs2/cluster/tcp.c
> +++ b/fs/ocfs2/cluster/tcp.c
> @@ -1196,11 +1196,10 @@ static int o2net_process_message(struct o2net_sock_container *sc,
>  			break;
>  		default:
>  			msglog(hdr, "bad magic\n");
>  			ret = -EINVAL;
>  			goto out;
> -			break;
>  	}
>  
>  	/* find a handler for it */
>  	handler_status = 0;
>  	nmh = o2net_handler_get(be16_to_cpu(hdr->msg_type),
> diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
> index 1110ecd7d1f3..8f50c9c19f1b 100644
> --- a/kernel/bpf/syscall.c
> +++ b/kernel/bpf/syscall.c
> @@ -2911,11 +2911,10 @@ attach_type_to_prog_type(enum bpf_attach_type attach_type)
>  {
>  	switch (attach_type) {
>  	case BPF_CGROUP_INET_INGRESS:
>  	case BPF_CGROUP_INET_EGRESS:
>  		return BPF_PROG_TYPE_CGROUP_SKB;
> -		break;
>  	case BPF_CGROUP_INET_SOCK_CREATE:
>  	case BPF_CGROUP_INET_SOCK_RELEASE:
>  	case BPF_CGROUP_INET4_POST_BIND:
>  	case BPF_CGROUP_INET6_POST_BIND:
>  		return BPF_PROG_TYPE_CGROUP_SOCK;
> diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
> index 3dd8c2e4314e..f400a6122b3c 100644
> --- a/security/integrity/ima/ima_appraise.c
> +++ b/security/integrity/ima/ima_appraise.c
> @@ -179,11 +179,10 @@ enum hash_algo ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value,
>  	case EVM_IMA_XATTR_DIGSIG:
>  		sig = (typeof(sig))xattr_value;
>  		if (sig->version != 2 || xattr_len <= sizeof(*sig))
>  			return ima_hash_algo;
>  		return sig->hash_algo;
> -		break;
>  	case IMA_XATTR_DIGEST_NG:
>  		/* first byte contains algorithm id */
>  		ret = xattr_value->data[0];
>  		if (ret < HASH_ALGO__LAST)
>  			return ret;
> diff --git a/security/keys/trusted-keys/trusted_tpm1.c b/security/keys/trusted-keys/trusted_tpm1.c
> index b9fe02e5f84f..eddc9477d42a 100644
> --- a/security/keys/trusted-keys/trusted_tpm1.c
> +++ b/security/keys/trusted-keys/trusted_tpm1.c
> @@ -899,11 +899,10 @@ static int datablob_parse(char *datablob, struct trusted_key_payload *p,
>  			return ret;
>  		ret = Opt_update;
>  		break;
>  	case Opt_err:
>  		return -EINVAL;
> -		break;
>  	}
>  	return ret;
>  }
>  
>  static struct trusted_key_options *trusted_options_alloc(void)
> diff --git a/security/safesetid/lsm.c b/security/safesetid/lsm.c
> index 8a176b6adbe5..1079c6d54784 100644
> --- a/security/safesetid/lsm.c
> +++ b/security/safesetid/lsm.c
> @@ -123,11 +123,10 @@ static int safesetid_security_capable(const struct cred *cred,
>  		 * set*uid() (e.g. setting up userns uid mappings).
>  		 */
>  		pr_warn("Operation requires CAP_SETUID, which is not available to UID %u for operations besides approved set*uid transitions\n",
>  			__kuid_val(cred->uid));
>  		return -EPERM;
> -		break;
>  	case CAP_SETGID:
>  		/*
>  		* If no policy applies to this task, allow the use of CAP_SETGID for
>  		* other purposes.
>  		*/
> @@ -138,15 +137,13 @@ static int safesetid_security_capable(const struct cred *cred,
>  		 * set*gid() (e.g. setting up userns gid mappings).
>  		 */
>  		pr_warn("Operation requires CAP_SETGID, which is not available to GID %u for operations besides approved set*gid transitions\n",
>  			__kuid_val(cred->uid));
>  		return -EPERM;
> -		break;
>  	default:
>  		/* Error, the only capabilities were checking for is CAP_SETUID/GID */
>  		return 0;
> -		break;
>  	}
>  	return 0;
>  }
>  
>  /*
> diff --git a/sound/pci/rme32.c b/sound/pci/rme32.c
> index 869af8a32c98..4eabece4dcba 100644
> --- a/sound/pci/rme32.c
> +++ b/sound/pci/rme32.c
> @@ -466,11 +466,10 @@ static int snd_rme32_capture_getrate(struct rme32 * rme32, int *is_adat)
>  			return 44100;
>  		case 7:
>  			return 32000;
>  		default:
>  			return -1;
> -			break;
>  		} 
>  	else
>  		switch (n) {	/* supporting the CS8412 */
>  		case 0:
>  			return -1;
> diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
> index 4a1f576dd9cf..3382c069fd3d 100644
> --- a/sound/pci/rme9652/hdspm.c
> +++ b/sound/pci/rme9652/hdspm.c
> @@ -2284,11 +2284,10 @@ static int hdspm_get_wc_sample_rate(struct hdspm *hdspm)
>  	switch (hdspm->io_type) {
>  	case RayDAT:
>  	case AIO:
>  		status = hdspm_read(hdspm, HDSPM_RD_STATUS_1);
>  		return (status >> 16) & 0xF;
> -		break;
>  	case AES32:
>  		status = hdspm_read(hdspm, HDSPM_statusRegister);
>  		return (status >> HDSPM_AES32_wcFreq_bit) & 0xF;
>  	default:
>  		break;
> @@ -2310,11 +2309,10 @@ static int hdspm_get_tco_sample_rate(struct hdspm *hdspm)
>  		switch (hdspm->io_type) {
>  		case RayDAT:
>  		case AIO:
>  			status = hdspm_read(hdspm, HDSPM_RD_STATUS_1);
>  			return (status >> 20) & 0xF;
> -			break;
>  		case AES32:
>  			status = hdspm_read(hdspm, HDSPM_statusRegister);
>  			return (status >> 1) & 0xF;
>  		default:
>  			break;
> @@ -2336,11 +2334,10 @@ static int hdspm_get_sync_in_sample_rate(struct hdspm *hdspm)
>  		switch (hdspm->io_type) {
>  		case RayDAT:
>  		case AIO:
>  			status = hdspm_read(hdspm, HDSPM_RD_STATUS_2);
>  			return (status >> 12) & 0xF;
> -			break;
>  		default:
>  			break;
>  		}
>  	}
>  
> @@ -2356,11 +2353,10 @@ static int hdspm_get_aes_sample_rate(struct hdspm *hdspm, int index)
>  
>  	switch (hdspm->io_type) {
>  	case AES32:
>  		timecode = hdspm_read(hdspm, HDSPM_timecodeRegister);
>  		return (timecode >> (4*index)) & 0xF;
> -		break;
>  	default:
>  		break;
>  	}
>  	return 0;
>  }
> @@ -3843,22 +3839,20 @@ static int hdspm_wc_sync_check(struct hdspm *hdspm)
>  				return 2;
>  			else
>  				return 1;
>  		}
>  		return 0;
> -		break;
>  
>  	case MADI:
>  		status2 = hdspm_read(hdspm, HDSPM_statusRegister2);
>  		if (status2 & HDSPM_wcLock) {
>  			if (status2 & HDSPM_wcSync)
>  				return 2;
>  			else
>  				return 1;
>  		}
>  		return 0;
> -		break;
>  
>  	case RayDAT:
>  	case AIO:
>  		status = hdspm_read(hdspm, HDSPM_statusRegister);
>  
> @@ -3866,12 +3860,10 @@ static int hdspm_wc_sync_check(struct hdspm *hdspm)
>  			return 2;
>  		else if (status & 0x1000000)
>  			return 1;
>  		return 0;
>  
> -		break;
> -
>  	case MADIface:
>  		break;
>  	}
>  
>  
> diff --git a/sound/pci/rme9652/rme9652.c b/sound/pci/rme9652/rme9652.c
> index 7ab10028d9fa..012fbec5e6a7 100644
> --- a/sound/pci/rme9652/rme9652.c
> +++ b/sound/pci/rme9652/rme9652.c
> @@ -730,38 +730,31 @@ static inline int rme9652_spdif_sample_rate(struct snd_rme9652 *s)
>  	rate_bits = rme9652_read(s, RME9652_status_register) & RME9652_F;
>  
>  	switch (rme9652_decode_spdif_rate(rate_bits)) {
>  	case 0x7:
>  		return 32000;
> -		break;
>  
>  	case 0x6:
>  		return 44100;
> -		break;
>  
>  	case 0x5:
>  		return 48000;
> -		break;
>  
>  	case 0x4:
>  		return 88200;
> -		break;
>  
>  	case 0x3:
>  		return 96000;
> -		break;
>  
>  	case 0x0:
>  		return 64000;
> -		break;
>  
>  	default:
>  		dev_err(s->card->dev,
>  			"%s: unknown S/PDIF input rate (bits = 0x%x)\n",
>  			   s->card_name, rate_bits);
>  		return 0;
> -		break;
>  	}
>  }
>  
>  /*-----------------------------------------------------------------------------
>    Control Interface
> diff --git a/sound/soc/codecs/wcd-clsh-v2.c b/sound/soc/codecs/wcd-clsh-v2.c
> index 1be82113c59a..817d8259758c 100644
> --- a/sound/soc/codecs/wcd-clsh-v2.c
> +++ b/sound/soc/codecs/wcd-clsh-v2.c
> @@ -478,11 +478,10 @@ static int _wcd_clsh_ctrl_set_state(struct wcd_clsh_ctrl *ctrl, int req_state,
>  		wcd_clsh_state_hph_l(ctrl, req_state, is_enable, mode);
>  		break;
>  	case WCD_CLSH_STATE_HPHR:
>  		wcd_clsh_state_hph_r(ctrl, req_state, is_enable, mode);
>  		break;
> -		break;
>  	case WCD_CLSH_STATE_LO:
>  		wcd_clsh_state_lo(ctrl, req_state, is_enable, mode);
>  		break;
>  	default:
>  		break;
> diff --git a/sound/soc/codecs/wl1273.c b/sound/soc/codecs/wl1273.c
> index c56b9329240f..d8ced4559bf2 100644
> --- a/sound/soc/codecs/wl1273.c
> +++ b/sound/soc/codecs/wl1273.c
> @@ -309,11 +309,10 @@ static int wl1273_startup(struct snd_pcm_substream *substream,
>  			return -EINVAL;
>  		}
>  		break;
>  	default:
>  		return -EINVAL;
> -		break;
>  	}
>  
>  	return 0;
>  }
>  
> diff --git a/sound/soc/intel/skylake/skl-pcm.c b/sound/soc/intel/skylake/skl-pcm.c
> index bbe8d782e0af..b1ca64d2f7ea 100644
> --- a/sound/soc/intel/skylake/skl-pcm.c
> +++ b/sound/soc/intel/skylake/skl-pcm.c
> @@ -500,11 +500,10 @@ static int skl_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
>  		 */
>  		ret = skl_decoupled_trigger(substream, cmd);
>  		if (ret < 0)
>  			return ret;
>  		return skl_run_pipe(skl, mconfig->pipe);
> -		break;
>  
>  	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
>  	case SNDRV_PCM_TRIGGER_SUSPEND:
>  	case SNDRV_PCM_TRIGGER_STOP:
>  		/*
> diff --git a/sound/soc/ti/davinci-mcasp.c b/sound/soc/ti/davinci-mcasp.c
> index a6b72ad53b43..2d85cc4c67fb 100644
> --- a/sound/soc/ti/davinci-mcasp.c
> +++ b/sound/soc/ti/davinci-mcasp.c
> @@ -2383,11 +2383,10 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
>  		break;
>  	default:
>  		dev_err(&pdev->dev, "No DMA controller found (%d)\n", ret);
>  	case -EPROBE_DEFER:
>  		goto err;
> -		break;
>  	}
>  
>  	if (ret) {
>  		dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
>  		goto err;
> 


^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-18  5:43 ` Greg KH
@ 2020-10-18 14:04   ` Tom Rix
  2020-10-19 19:42   ` Nick Desaulniers
  1 sibling, 0 replies; 20+ messages in thread
From: Tom Rix @ 2020-10-18 14:04 UTC (permalink / raw)
  To: Greg KH
  Cc: linux-kernel, linux-edac, linux-acpi, linux-pm, xen-devel,
	linux-block, openipmi-developer, linux-crypto, linux-arm-kernel,
	linux-power, linux-gpio, amd-gfx, dri-devel, nouveau,
	virtualization, spice-devel, linux-iio, linux-amlogic,
	industrypack-devel, linux-media, MPT-FusionLinux.pdl, linux-scsi,
	linux-mtd, linux-can, netdev, intel-wired-lan, ath10k,
	linux-wireless, linux-stm32, linux-nfc, linux-nvdimm, linux-pci,
	linux-samsung-soc, platform-driver-x86, patches, storagedev,
	devel, linux-serial, linux-usb, usb-storage, linux-watchdog,
	ocfs2-devel, bpf, linux-integrity, linux-security-module,
	keyrings, alsa-devel, clang-built-linux


On 10/17/20 10:43 PM, Greg KH wrote:
> On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
>> From: Tom Rix <trix@redhat.com>
>>
>> This is a upcoming change to clean up a new warning treewide.
>> I am wondering if the change could be one mega patch (see below) or
>> normal patch per file about 100 patches or somewhere half way by collecting
>> early acks.
> Please break it up into one-patch-per-subsystem, like normal, and get it
> merged that way.

OK.

Thanks,

Tom

>
> Sending us a patch, without even a diffstat to review, isn't going to
> get you very far...
>
> thanks,
>
> greg k-h
>


^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [Ocfs2-devel] [RFC] treewide: cleanup unreachable breaks
  2020-10-17 16:09 [RFC] treewide: cleanup unreachable breaks trix
                   ` (4 preceding siblings ...)
  2020-10-18  9:29 ` Hans de Goede
@ 2020-10-18 18:59 ` Matthew Wilcox
  2020-10-18 19:06   ` Joe Perches
  2020-10-18 19:13   ` James Bottomley
  5 siblings, 2 replies; 20+ messages in thread
From: Matthew Wilcox @ 2020-10-18 18:59 UTC (permalink / raw)
  To: trix
  Cc: linux-kernel, alsa-devel, clang-built-linux, linux-iio, nouveau,
	storagedev, dri-devel, virtualization, keyrings, linux-mtd,
	ath10k, MPT-FusionLinux.pdl, linux-stm32, usb-storage,
	linux-watchdog, devel, linux-samsung-soc, linux-scsi,
	linux-nvdimm, amd-gfx, linux-acpi, intel-wired-lan,
	industrypack-devel, linux-pci, spice-devel, linux-media,
	linux-serial, linux-nfc, linux-pm, linux-can, linux-block,
	linux-gpio, xen-devel, linux-amlogic, openipmi-developer,
	platform-driver-x86, linux-integrity, linux-arm-kernel,
	linux-edac, netdev, linux-usb, linux-wireless,
	linux-security-module, linux-crypto, patches, bpf, ocfs2-devel,
	linux-power

On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
> clang has a number of useful, new warnings see
> https://urldefense.com/v3/__https://clang.llvm.org/docs/DiagnosticsReference.html__;!!GqivPVa7Brio!Krxz78O3RKcB9JBMVo_F98FupVhj_jxX60ddN6tKGEbv_cnooXc1nnBmchm-e_O9ieGnyQ$ 

Please get your IT department to remove that stupidity.  If you can't,
please send email from a non-Red Hat email address.

I don't understand why this is a useful warning to fix.  What actual
problem is caused by the code below?

> return and break
> 
>  	switch (c->x86_vendor) {
>  	case X86_VENDOR_INTEL:
>  		intel_p5_mcheck_init(c);
>  		return 1;
> -		break;

Sure, it's unnecessary, but it's not masking a bug.  It's not unclear.
Why do we want to enable this warning?


^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [Ocfs2-devel] [RFC] treewide: cleanup unreachable breaks
  2020-10-18 18:59 ` [Ocfs2-devel] " Matthew Wilcox
@ 2020-10-18 19:06   ` Joe Perches
  2020-10-18 19:13   ` James Bottomley
  1 sibling, 0 replies; 20+ messages in thread
From: Joe Perches @ 2020-10-18 19:06 UTC (permalink / raw)
  To: Matthew Wilcox, trix
  Cc: linux-kernel, alsa-devel, clang-built-linux, linux-iio, nouveau,
	storagedev, dri-devel, virtualization, keyrings, linux-mtd,
	ath10k, MPT-FusionLinux.pdl, linux-stm32, usb-storage,
	linux-watchdog, devel, linux-samsung-soc, linux-scsi,
	linux-nvdimm, amd-gfx, linux-acpi, intel-wired-lan,
	industrypack-devel, linux-pci, spice-devel, linux-media,
	linux-serial, linux-nfc, linux-pm, linux-can, linux-block,
	linux-gpio, xen-devel, linux-amlogic, openipmi-developer,
	platform-driver-x86, linux-integrity, linux-arm-kernel,
	linux-edac, netdev, linux-usb, linux-wireless,
	linux-security-module, linux-crypto, patches, bpf, ocfs2-devel,
	linux-power

On Sun, 2020-10-18 at 19:59 +0100, Matthew Wilcox wrote:
> On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
> > clang has a number of useful, new warnings see
> > https://urldefense.com/v3/__https://clang.llvm.org/docs/DiagnosticsReference.html__;!!GqivPVa7Brio!Krxz78O3RKcB9JBMVo_F98FupVhj_jxX60ddN6tKGEbv_cnooXc1nnBmchm-e_O9ieGnyQ$ 
> 
> Please get your IT department to remove that stupidity.  If you can't,
> please send email from a non-Red Hat email address.

I didn't get it this way, neither did lore.
It's on your end.

https://lore.kernel.org/lkml/20201017160928.12698-1-trix@redhat.com/

> I don't understand why this is a useful warning to fix.

Precision in coding style intent and code minimization
would be the biggest factors IMO.

> What actual problem is caused by the code below?

Obviously none.



^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [Ocfs2-devel] [RFC] treewide: cleanup unreachable breaks
  2020-10-18 18:59 ` [Ocfs2-devel] " Matthew Wilcox
  2020-10-18 19:06   ` Joe Perches
@ 2020-10-18 19:13   ` James Bottomley
  2020-10-18 19:16     ` Matthew Wilcox
  1 sibling, 1 reply; 20+ messages in thread
From: James Bottomley @ 2020-10-18 19:13 UTC (permalink / raw)
  To: Matthew Wilcox, trix
  Cc: linux-kernel, alsa-devel, clang-built-linux, linux-iio, nouveau,
	storagedev, dri-devel, virtualization, keyrings, linux-mtd,
	ath10k, MPT-FusionLinux.pdl, linux-stm32, usb-storage,
	linux-watchdog, devel, linux-samsung-soc, linux-scsi,
	linux-nvdimm, amd-gfx, linux-acpi, intel-wired-lan,
	industrypack-devel, linux-pci, spice-devel, linux-media,
	linux-serial, linux-nfc, linux-pm, linux-can, linux-block,
	linux-gpio, xen-devel, linux-amlogic, openipmi-developer,
	platform-driver-x86, linux-integrity, linux-arm-kernel,
	linux-edac, netdev, linux-usb, linux-wireless,
	linux-security-module, linux-crypto, patches, bpf, ocfs2-devel,
	linux-power

On Sun, 2020-10-18 at 19:59 +0100, Matthew Wilcox wrote:
> On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
> > clang has a number of useful, new warnings see
> > https://urldefense.com/v3/__https://clang.llvm.org/docs/DiagnosticsReference.html__;!!GqivPVa7Brio!Krxz78O3RKcB9JBMVo_F98FupVhj_jxX60ddN6tKGEbv_cnooXc1nnBmchm-e_O9ieGnyQ$ 
> 
> Please get your IT department to remove that stupidity.  If you
> can't, please send email from a non-Red Hat email address.

Actually, the problem is at Oracle's end somewhere in the ocfs2 list
... if you could fix it, that would be great.  The usual real mailing
lists didn't get this transformation

https://lore.kernel.org/bpf/20201017160928.12698-1-trix@redhat.com/

but the ocfs2 list archive did:

https://oss.oracle.com/pipermail/ocfs2-devel/2020-October/015330.html

I bet Oracle IT has put some spam filter on the list that mangles URLs
this way.

James



^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [Ocfs2-devel] [RFC] treewide: cleanup unreachable breaks
  2020-10-18 19:13   ` James Bottomley
@ 2020-10-18 19:16     ` Matthew Wilcox
  2020-10-18 19:17       ` James Bottomley
  0 siblings, 1 reply; 20+ messages in thread
From: Matthew Wilcox @ 2020-10-18 19:16 UTC (permalink / raw)
  To: James Bottomley
  Cc: trix, linux-kernel, alsa-devel, clang-built-linux, linux-iio,
	nouveau, storagedev, dri-devel, virtualization, keyrings,
	linux-mtd, ath10k, MPT-FusionLinux.pdl, linux-stm32, usb-storage,
	linux-watchdog, devel, linux-samsung-soc, linux-scsi,
	linux-nvdimm, amd-gfx, linux-acpi, intel-wired-lan,
	industrypack-devel, linux-pci, spice-devel, linux-media,
	linux-serial, linux-nfc, linux-pm, linux-can, linux-block,
	linux-gpio, xen-devel, linux-amlogic, openipmi-developer,
	platform-driver-x86, linux-integrity, linux-arm-kernel,
	linux-edac, netdev, linux-usb, linux-wireless,
	linux-security-module, linux-crypto, patches, bpf, ocfs2-devel,
	linux-power

On Sun, Oct 18, 2020 at 12:13:35PM -0700, James Bottomley wrote:
> On Sun, 2020-10-18 at 19:59 +0100, Matthew Wilcox wrote:
> > On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
> > > clang has a number of useful, new warnings see
> > > https://urldefense.com/v3/__https://clang.llvm.org/docs/DiagnosticsReference.html__;!!GqivPVa7Brio!Krxz78O3RKcB9JBMVo_F98FupVhj_jxX60ddN6tKGEbv_cnooXc1nnBmchm-e_O9ieGnyQ$ 
> > 
> > Please get your IT department to remove that stupidity.  If you
> > can't, please send email from a non-Red Hat email address.
> 
> Actually, the problem is at Oracle's end somewhere in the ocfs2 list
> ... if you could fix it, that would be great.  The usual real mailing
> lists didn't get this transformation
> 
> https://lore.kernel.org/bpf/20201017160928.12698-1-trix@redhat.com/
> 
> but the ocfs2 list archive did:
> 
> https://oss.oracle.com/pipermail/ocfs2-devel/2020-October/015330.html
> 
> I bet Oracle IT has put some spam filter on the list that mangles URLs
> this way.

*sigh*.  I'm sure there's a way.  I've raised it with someone who should
be able to fix it.

^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [Ocfs2-devel] [RFC] treewide: cleanup unreachable breaks
  2020-10-18 19:16     ` Matthew Wilcox
@ 2020-10-18 19:17       ` James Bottomley
  0 siblings, 0 replies; 20+ messages in thread
From: James Bottomley @ 2020-10-18 19:17 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: trix, linux-kernel, alsa-devel, clang-built-linux, linux-iio,
	nouveau, storagedev, dri-devel, virtualization, keyrings,
	linux-mtd, ath10k, MPT-FusionLinux.pdl, linux-stm32, usb-storage,
	linux-watchdog, devel, linux-samsung-soc, linux-scsi,
	linux-nvdimm, amd-gfx, linux-acpi, intel-wired-lan,
	industrypack-devel, linux-pci, spice-devel, linux-media,
	linux-serial, linux-nfc, linux-pm, linux-can, linux-block,
	linux-gpio, xen-devel, linux-amlogic, openipmi-developer,
	platform-driver-x86, linux-integrity, linux-arm-kernel,
	linux-edac, netdev, linux-usb, linux-wireless,
	linux-security-module, linux-crypto, patches, bpf, ocfs2-devel,
	linux-power

On Sun, 2020-10-18 at 20:16 +0100, Matthew Wilcox wrote:
> On Sun, Oct 18, 2020 at 12:13:35PM -0700, James Bottomley wrote:
> > On Sun, 2020-10-18 at 19:59 +0100, Matthew Wilcox wrote:
> > > On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
> > > > clang has a number of useful, new warnings see
> > > > https://urldefense.com/v3/__https://clang.llvm.org/docs/DiagnosticsReference.html__;!!GqivPVa7Brio!Krxz78O3RKcB9JBMVo_F98FupVhj_jxX60ddN6tKGEbv_cnooXc1nnBmchm-e_O9ieGnyQ$ 
> > > 
> > > Please get your IT department to remove that stupidity.  If you
> > > can't, please send email from a non-Red Hat email address.
> > 
> > Actually, the problem is at Oracle's end somewhere in the ocfs2
> > list ... if you could fix it, that would be great.  The usual real
> > mailing lists didn't get this transformation
> > 
> > https://lore.kernel.org/bpf/20201017160928.12698-1-trix@redhat.com/
> > 
> > but the ocfs2 list archive did:
> > 
> > https://oss.oracle.com/pipermail/ocfs2-devel/2020-October/015330.html
> > 
> > I bet Oracle IT has put some spam filter on the list that mangles
> > URLs this way.
> 
> *sigh*.  I'm sure there's a way.  I've raised it with someone who
> should be able to fix it.

As someone who works for IBM I can only say I feel your pain ...

James



^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-18  5:43 ` Greg KH
  2020-10-18 14:04   ` Tom Rix
@ 2020-10-19 19:42   ` Nick Desaulniers
  2020-10-19 23:05     ` Jason Gunthorpe
                       ` (3 more replies)
  1 sibling, 4 replies; 20+ messages in thread
From: Nick Desaulniers @ 2020-10-19 19:42 UTC (permalink / raw)
  To: Tom Rix
  Cc: LKML, linux-edac, linux-acpi, linux-pm, xen-devel, linux-block,
	openipmi-developer,
	open list:HARDWARE RANDOM NUMBER GENERATOR CORE, Linux ARM,
	linux-power, linux-gpio, amd-gfx list, dri-devel, nouveau,
	virtualization, spice-devel, linux-iio, linux-amlogic,
	industrypack-devel, linux-media, MPT-FusionLinux.pdl, linux-scsi,
	linux-mtd, linux-can, Network Development, intel-wired-lan,
	ath10k, linux-wireless, linux-stm32, linux-nfc, linux-nvdimm,
	linux-pci, linux-samsung-soc, platform-driver-x86, patches,
	storagedev, devel, linux-serial, linux-usb, usb-storage,
	linux-watchdog, ocfs2-devel, bpf, linux-integrity,
	linux-security-module, keyrings, alsa-devel, clang-built-linux,
	Greg KH, George Burgess

On Sat, Oct 17, 2020 at 10:43 PM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
> > From: Tom Rix <trix@redhat.com>
> >
> > This is a upcoming change to clean up a new warning treewide.
> > I am wondering if the change could be one mega patch (see below) or
> > normal patch per file about 100 patches or somewhere half way by collecting
> > early acks.
>
> Please break it up into one-patch-per-subsystem, like normal, and get it
> merged that way.
>
> Sending us a patch, without even a diffstat to review, isn't going to
> get you very far...

Tom,
If you're able to automate this cleanup, I suggest checking in a
script that can be run on a directory.  Then for each subsystem you
can say in your commit "I ran scripts/fix_whatever.py on this subdir."
 Then others can help you drive the tree wide cleanup.  Then we can
enable -Wunreachable-code-break either by default, or W=2 right now
might be a good idea.

Ah, George (gbiv@, cc'ed), did an analysis recently of
`-Wunreachable-code-loop-increment`, `-Wunreachable-code-break`, and
`-Wunreachable-code-return` for Android userspace.  From the review:
```
Spoilers: of these, it seems useful to turn on
-Wunreachable-code-loop-increment and -Wunreachable-code-return by
default for Android
...
While these conventions about always having break arguably became
obsolete when we enabled -Wfallthrough, my sample turned up zero
potential bugs caught by this warning, and we'd need to put a lot of
effort into getting a clean tree. So this warning doesn't seem to be
worth it.
```
Looks like there's an order of magnitude of `-Wunreachable-code-break`
than the other two.

We probably should add all 3 to W=2 builds (wrapped in cc-option).
I've filed https://github.com/ClangBuiltLinux/linux/issues/1180 to
follow up on.
-- 
Thanks,
~Nick Desaulniers

^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-19 19:42   ` Nick Desaulniers
@ 2020-10-19 23:05     ` Jason Gunthorpe
  2020-10-20 14:09       ` Tom Rix
  2020-10-20  8:47     ` [Ocfs2-devel] " John Haxby
                       ` (2 subsequent siblings)
  3 siblings, 1 reply; 20+ messages in thread
From: Jason Gunthorpe @ 2020-10-19 23:05 UTC (permalink / raw)
  To: Nick Desaulniers
  Cc: Tom Rix, LKML, linux-edac, linux-acpi, linux-pm, xen-devel,
	linux-block, openipmi-developer,
	open list:HARDWARE RANDOM NUMBER GENERATOR CORE, Linux ARM,
	linux-power, linux-gpio, amd-gfx list, dri-devel, nouveau,
	virtualization, spice-devel, linux-iio, linux-amlogic,
	industrypack-devel, linux-media, MPT-FusionLinux.pdl, linux-scsi,
	linux-mtd, linux-can, Network Development, intel-wired-lan,
	ath10k, linux-wireless, linux-stm32, linux-nfc, linux-nvdimm,
	linux-pci, linux-samsung-soc, platform-driver-x86, patches,
	storagedev, devel, linux-serial, linux-usb, usb-storage,
	linux-watchdog, ocfs2-devel, bpf, linux-integrity,
	linux-security-module, keyrings, alsa-devel, clang-built-linux,
	Greg KH, George Burgess

On Mon, Oct 19, 2020 at 12:42:15PM -0700, Nick Desaulniers wrote:
> On Sat, Oct 17, 2020 at 10:43 PM Greg KH <gregkh@linuxfoundation.org> wrote:
> >
> > On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
> > > From: Tom Rix <trix@redhat.com>
> > >
> > > This is a upcoming change to clean up a new warning treewide.
> > > I am wondering if the change could be one mega patch (see below) or
> > > normal patch per file about 100 patches or somewhere half way by collecting
> > > early acks.
> >
> > Please break it up into one-patch-per-subsystem, like normal, and get it
> > merged that way.
> >
> > Sending us a patch, without even a diffstat to review, isn't going to
> > get you very far...
> 
> Tom,
> If you're able to automate this cleanup, I suggest checking in a
> script that can be run on a directory.  Then for each subsystem you
> can say in your commit "I ran scripts/fix_whatever.py on this subdir."
>  Then others can help you drive the tree wide cleanup.  Then we can
> enable -Wunreachable-code-break either by default, or W=2 right now
> might be a good idea.

I remember using clang-modernize in the past to fix issues very
similar to this, if clang machinery can generate the warning, can't
something like clang-tidy directly generate the patch?

You can send me a patch for drivers/infiniband/* as well

Thanks,
Jason

^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [Ocfs2-devel] [RFC] treewide: cleanup unreachable breaks
  2020-10-19 19:42   ` Nick Desaulniers
  2020-10-19 23:05     ` Jason Gunthorpe
@ 2020-10-20  8:47     ` John Haxby
  2020-10-20 13:55     ` Tom Rix
  2020-10-20 18:42     ` Joe Perches
  3 siblings, 0 replies; 20+ messages in thread
From: John Haxby @ 2020-10-20  8:47 UTC (permalink / raw)
  To: Nick Desaulniers
  Cc: Tom Rix, alsa-devel, clang-built-linux, Greg KH, linux-iio,
	nouveau, storagedev, dri-devel, virtualization, keyrings,
	linux-mtd, ath10k, MPT-FusionLinux.pdl, linux-stm32, usb-storage,
	linux-watchdog, devel, linux-samsung-soc, linux-scsi,
	linux-nvdimm, amd-gfx list, linux-acpi, intel-wired-lan,
	industrypack-devel, linux-pci, spice-devel, linux-media,
	linux-serial, linux-nfc, linux-pm, linux-can, linux-block,
	linux-gpio, xen-devel, linux-amlogic, openipmi-developer,
	platform-driver-x86, linux-integrity, Linux ARM, linux-edac,
	George Burgess, Network Development, linux-usb, linux-wireless,
	LKML, linux-security-module,
	open list:HARDWARE RANDOM NUMBER GENERATOR CORE, patches, bpf,
	ocfs2-devel, linux-power


[-- Attachment #1: Type: text/plain, Size: 370 bytes --]



> On 19 Oct 2020, at 20:42, Nick Desaulniers <ndesaulniers@google.com> wrote:
> 
> We probably should add all 3 to W=2 builds (wrapped in cc-option).
> I've filed https://github.com/ClangBuiltLinux/linux/issues/1180 to
> follow up on.

It looks as though the URL mangling has been fixed.   If anyone sees that specific URL mangled, please let me know.

jch

[-- Attachment #2: Message signed with OpenPGP --]
[-- Type: application/pgp-signature, Size: 268 bytes --]

^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-19 19:42   ` Nick Desaulniers
  2020-10-19 23:05     ` Jason Gunthorpe
  2020-10-20  8:47     ` [Ocfs2-devel] " John Haxby
@ 2020-10-20 13:55     ` Tom Rix
  2020-10-20 18:42     ` Joe Perches
  3 siblings, 0 replies; 20+ messages in thread
From: Tom Rix @ 2020-10-20 13:55 UTC (permalink / raw)
  To: Nick Desaulniers
  Cc: LKML, linux-edac, linux-acpi, linux-pm, xen-devel, linux-block,
	openipmi-developer,
	open list:HARDWARE RANDOM NUMBER GENERATOR CORE, Linux ARM,
	linux-power, linux-gpio, amd-gfx list, dri-devel, nouveau,
	virtualization, spice-devel, linux-iio, linux-amlogic,
	industrypack-devel, linux-media, MPT-FusionLinux.pdl, linux-scsi,
	linux-mtd, linux-can, Network Development, intel-wired-lan,
	ath10k, linux-wireless, linux-stm32, linux-nfc, linux-nvdimm,
	linux-pci, linux-samsung-soc, platform-driver-x86, patches,
	storagedev, devel, linux-serial, linux-usb, usb-storage,
	linux-watchdog, ocfs2-devel, bpf, linux-integrity,
	linux-security-module, keyrings, alsa-devel, clang-built-linux,
	Greg KH, George Burgess, Joe Perches


On 10/19/20 12:42 PM, Nick Desaulniers wrote:
> On Sat, Oct 17, 2020 at 10:43 PM Greg KH <gregkh@linuxfoundation.org> wrote:
>> On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
>>> From: Tom Rix <trix@redhat.com>
>>>
>>> This is a upcoming change to clean up a new warning treewide.
>>> I am wondering if the change could be one mega patch (see below) or
>>> normal patch per file about 100 patches or somewhere half way by collecting
>>> early acks.
>> Please break it up into one-patch-per-subsystem, like normal, and get it
>> merged that way.
>>
>> Sending us a patch, without even a diffstat to review, isn't going to
>> get you very far...
> Tom,
> If you're able to automate this cleanup, I suggest checking in a
> script that can be run on a directory.  Then for each subsystem you
> can say in your commit "I ran scripts/fix_whatever.py on this subdir."
>  Then others can help you drive the tree wide cleanup.  Then we can
> enable -Wunreachable-code-break either by default, or W=2 right now
> might be a good idea.

I should have waited for Joe Perches's fixer addition to checkpatch :)

The easy fixes I did only cover about 1/2 of the problems.

Remaining are mostly nested switches, which from a complexity standpoint is bad.

>
> Ah, George (gbiv@, cc'ed), did an analysis recently of
> `-Wunreachable-code-loop-increment`, `-Wunreachable-code-break`, and
> `-Wunreachable-code-return` for Android userspace.  From the review:
> ```
> Spoilers: of these, it seems useful to turn on
> -Wunreachable-code-loop-increment and -Wunreachable-code-return by
> default for Android

In my simple add-a-cflag bot, i see there are about 250

issues for -Wunreachable-code-return.

I'll see about doing this one next.

> ...
> While these conventions about always having break arguably became
> obsolete when we enabled -Wfallthrough, my sample turned up zero
> potential bugs caught by this warning, and we'd need to put a lot of
> effort into getting a clean tree. So this warning doesn't seem to be
> worth it.
> ```
> Looks like there's an order of magnitude of `-Wunreachable-code-break`
> than the other two.
>
> We probably should add all 3 to W=2 builds (wrapped in cc-option).
> I've filed https://github.com/ClangBuiltLinux/linux/issues/1180 to
> follow up on.

Yes, i think think these should be added.

Tom


^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-19 23:05     ` Jason Gunthorpe
@ 2020-10-20 14:09       ` Tom Rix
  0 siblings, 0 replies; 20+ messages in thread
From: Tom Rix @ 2020-10-20 14:09 UTC (permalink / raw)
  To: Jason Gunthorpe, Nick Desaulniers
  Cc: LKML, linux-edac, linux-acpi, linux-pm, xen-devel, linux-block,
	openipmi-developer,
	open list:HARDWARE RANDOM NUMBER GENERATOR CORE, Linux ARM,
	linux-power, linux-gpio, amd-gfx list, dri-devel, nouveau,
	virtualization, spice-devel, linux-iio, linux-amlogic,
	industrypack-devel, linux-media, MPT-FusionLinux.pdl, linux-scsi,
	linux-mtd, linux-can, Network Development, intel-wired-lan,
	ath10k, linux-wireless, linux-stm32, linux-nfc, linux-nvdimm,
	linux-pci, linux-samsung-soc, platform-driver-x86, patches,
	storagedev, devel, linux-serial, linux-usb, usb-storage,
	linux-watchdog, ocfs2-devel, bpf, linux-integrity,
	linux-security-module, keyrings, alsa-devel, clang-built-linux,
	Greg KH, George Burgess


On 10/19/20 4:05 PM, Jason Gunthorpe wrote:
> On Mon, Oct 19, 2020 at 12:42:15PM -0700, Nick Desaulniers wrote:
>> On Sat, Oct 17, 2020 at 10:43 PM Greg KH <gregkh@linuxfoundation.org> wrote:
>>> On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
>>>> From: Tom Rix <trix@redhat.com>
>>>>
>>>> This is a upcoming change to clean up a new warning treewide.
>>>> I am wondering if the change could be one mega patch (see below) or
>>>> normal patch per file about 100 patches or somewhere half way by collecting
>>>> early acks.
>>> Please break it up into one-patch-per-subsystem, like normal, and get it
>>> merged that way.
>>>
>>> Sending us a patch, without even a diffstat to review, isn't going to
>>> get you very far...
>> Tom,
>> If you're able to automate this cleanup, I suggest checking in a
>> script that can be run on a directory.  Then for each subsystem you
>> can say in your commit "I ran scripts/fix_whatever.py on this subdir."
>>  Then others can help you drive the tree wide cleanup.  Then we can
>> enable -Wunreachable-code-break either by default, or W=2 right now
>> might be a good idea.
> I remember using clang-modernize in the past to fix issues very
> similar to this, if clang machinery can generate the warning, can't
> something like clang-tidy directly generate the patch?

Yes clang-tidy and similar are good tools.

Sometimes they change too much and your time shifts

from editing to analyzing and dropping changes.


I am looking at them for auto changing api.

When i have something greater than half baked i will post.

Tom

>
> You can send me a patch for drivers/infiniband/* as well
>
> Thanks,
> Jason
>


^ permalink raw reply	[flat|nested] 20+ messages in thread

* Re: [RFC] treewide: cleanup unreachable breaks
  2020-10-19 19:42   ` Nick Desaulniers
                       ` (2 preceding siblings ...)
  2020-10-20 13:55     ` Tom Rix
@ 2020-10-20 18:42     ` Joe Perches
  3 siblings, 0 replies; 20+ messages in thread
From: Joe Perches @ 2020-10-20 18:42 UTC (permalink / raw)
  To: Nick Desaulniers, Tom Rix
  Cc: LKML, linux-edac, linux-acpi, linux-pm, xen-devel, linux-block,
	openipmi-developer,
	open list:HARDWARE RANDOM NUMBER GENERATOR CORE, Linux ARM,
	linux-power, linux-gpio, amd-gfx list, dri-devel, nouveau,
	virtualization, spice-devel, linux-iio, linux-amlogic,
	industrypack-devel, linux-media, MPT-FusionLinux.pdl, linux-scsi,
	linux-mtd, linux-can, Network Development, intel-wired-lan,
	ath10k, linux-wireless, linux-stm32, linux-nfc, linux-nvdimm,
	linux-pci, linux-samsung-soc, platform-driver-x86, patches,
	storagedev, devel, linux-serial, linux-usb, usb-storage,
	linux-watchdog, ocfs2-devel, bpf, linux-integrity,
	linux-security-module, keyrings, alsa-devel, clang-built-linux,
	Greg KH, George Burgess

On Mon, 2020-10-19 at 12:42 -0700, Nick Desaulniers wrote:
> On Sat, Oct 17, 2020 at 10:43 PM Greg KH <gregkh@linuxfoundation.org> wrote:
> > On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix@redhat.com wrote:
> > > From: Tom Rix <trix@redhat.com>
> > > 
> > > This is a upcoming change to clean up a new warning treewide.
> > > I am wondering if the change could be one mega patch (see below) or
> > > normal patch per file about 100 patches or somewhere half way by collecting
> > > early acks.
> > 
> > Please break it up into one-patch-per-subsystem, like normal, and get it
> > merged that way.
> > 
> > Sending us a patch, without even a diffstat to review, isn't going to
> > get you very far...
> 
> Tom,
> If you're able to automate this cleanup, I suggest checking in a
> script that can be run on a directory.  Then for each subsystem you
> can say in your commit "I ran scripts/fix_whatever.py on this subdir."
>  Then others can help you drive the tree wide cleanup.  Then we can
> enable -Wunreachable-code-break either by default, or W=2 right now
> might be a good idea.
> 
> Ah, George (gbiv@, cc'ed), did an analysis recently of
> `-Wunreachable-code-loop-increment`, `-Wunreachable-code-break`, and
> `-Wunreachable-code-return` for Android userspace.  From the review:
> ```
> Spoilers: of these, it seems useful to turn on
> -Wunreachable-code-loop-increment and -Wunreachable-code-return by
> default for Android
> ...
> While these conventions about always having break arguably became
> obsolete when we enabled -Wfallthrough, my sample turned up zero
> potential bugs caught by this warning, and we'd need to put a lot of
> effort into getting a clean tree. So this warning doesn't seem to be
> worth it.
> ```
> Looks like there's an order of magnitude of `-Wunreachable-code-break`
> than the other two.
> 
> We probably should add all 3 to W=2 builds (wrapped in cc-option).
> I've filed https://github.com/ClangBuiltLinux/linux/issues/1180 to
> follow up on.

I suggest using W=1 as people that are doing cleanups
generally use that and not W=123 or any other style.

Every other use of W= is still quite noisy and these
code warnings are relatively trivially to fix up.



^ permalink raw reply	[flat|nested] 20+ messages in thread

end of thread, back to index

Thread overview: 20+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-10-17 16:09 [RFC] treewide: cleanup unreachable breaks trix
2020-10-17 16:24 ` Martin Blumenstingl
2020-10-17 16:24 ` Joe Perches
2020-10-17 18:21   ` [Cocci] " Julia Lawall
2020-10-17 19:00     ` Joe Perches
2020-10-17 21:01 ` Dan Williams
2020-10-18  5:43 ` Greg KH
2020-10-18 14:04   ` Tom Rix
2020-10-19 19:42   ` Nick Desaulniers
2020-10-19 23:05     ` Jason Gunthorpe
2020-10-20 14:09       ` Tom Rix
2020-10-20  8:47     ` [Ocfs2-devel] " John Haxby
2020-10-20 13:55     ` Tom Rix
2020-10-20 18:42     ` Joe Perches
2020-10-18  9:29 ` Hans de Goede
2020-10-18 18:59 ` [Ocfs2-devel] " Matthew Wilcox
2020-10-18 19:06   ` Joe Perches
2020-10-18 19:13   ` James Bottomley
2020-10-18 19:16     ` Matthew Wilcox
2020-10-18 19:17       ` James Bottomley

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