Merge tag 'fallthrough-fixes-clang-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux

Pull fallthrough fixes from Gustavo Silva:
 "Fix many fall-through warnings when building with Clang 12.0.0 and
  '-Wimplicit-fallthrough' so that we at some point will be able to
  enable that warning by default"

* tag 'fallthrough-fixes-clang-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux: (26 commits)
  rxrpc: Fix fall-through warnings for Clang
  drm/nouveau/clk: Fix fall-through warnings for Clang
  drm/nouveau/therm: Fix fall-through warnings for Clang
  drm/nouveau: Fix fall-through warnings for Clang
  xfs: Fix fall-through warnings for Clang
  xfrm: Fix fall-through warnings for Clang
  tipc: Fix fall-through warnings for Clang
  sctp: Fix fall-through warnings for Clang
  rds: Fix fall-through warnings for Clang
  net/packet: Fix fall-through warnings for Clang
  net: netrom: Fix fall-through warnings for Clang
  ide: Fix fall-through warnings for Clang
  hwmon: (max6621) Fix fall-through warnings for Clang
  hwmon: (corsair-cpro) Fix fall-through warnings for Clang
  firewire: core: Fix fall-through warnings for Clang
  braille_console: Fix fall-through warnings for Clang
  ipv4: Fix fall-through warnings for Clang
  qlcnic: Fix fall-through warnings for Clang
  bnxt_en: Fix fall-through warnings for Clang
  netxen_nic: Fix fall-through warnings for Clang
  ...

48 files changed, 58 insertions, 22 deletions

diff --git a/drivers/accessibility/braille/braille_console.c b/drivers/accessibility/braille/braille_console.c
index 9861302cc7db..359bead4b280 100644
--- a/drivers/accessibility/braille/braille_console.c
+++ b/drivers/accessibility/braille/braille_console.c
@@ -246,6 +246,7 @@ static int keyboard_notifier_call(struct notifier_block *blk,
 				beep(440);
 		}
 	}
+		break;
 	case KBD_UNBOUND_KEYCODE:
 	case KBD_UNICODE:
 	case KBD_KEYSYM:
diff --git a/drivers/atm/fore200e.c b/drivers/atm/fore200e.c
index b508df2ecada..fb2be3574c26 100644
--- a/drivers/atm/fore200e.c
+++ b/drivers/atm/fore200e.c
@@ -420,6 +420,7 @@ fore200e_shutdown(struct fore200e* fore200e)
 	/* XXX shouldn't we *start* by deregistering the device? */
 	atm_dev_deregister(fore200e->atm_dev);
 
+	fallthrough;
     case FORE200E_STATE_BLANK:
 	/* nothing to do for that state */
 	break;
diff --git a/drivers/firewire/core-topology.c b/drivers/firewire/core-topology.c
index ec68ed27b0a5..b63d55f5ebd3 100644
--- a/drivers/firewire/core-topology.c
+++ b/drivers/firewire/core-topology.c
@@ -58,6 +58,7 @@ static u32 *count_ports(u32 *sid, int *total_port_count, int *child_port_count)
 		case SELFID_PORT_PARENT:
 		case SELFID_PORT_NCONN:
 			(*total_port_count)++;
+			fallthrough;
 		case SELFID_PORT_NONE:
 			break;
 		}
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 170aba99a110..cf11febf60c0 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -440,6 +440,7 @@ nouveau_bo_pin(struct nouveau_bo *nvbo, uint32_t domain, bool contig)
 			break;
 		case TTM_PL_TT:
 			error |= !(domain & NOUVEAU_GEM_DOMAIN_GART);
+			break;
 		default:
 			break;
 		}
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 61e6d7412505..eb844cdcaec2 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -157,6 +157,7 @@ nouveau_conn_atomic_set_property(struct drm_connector *connector,
 			default:
 				break;
 			}
+			break;
 		case DRM_MODE_SCALE_FULLSCREEN:
 		case DRM_MODE_SCALE_CENTER:
 		case DRM_MODE_SCALE_ASPECT:
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/nv50.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/nv50.c
index 83067763c0ec..e1d31c62f9ec 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/nv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/nv50.c
@@ -313,6 +313,7 @@ nv50_clk_read(struct nvkm_clk *base, enum nv_clk_src src)
 		default:
 			break;
 		}
+		break;
 	default:
 		break;
 	}
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/gf119.c b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/gf119.c
index 2b031d4eaeb6..684aff7437ee 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/gf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/gf119.c
@@ -41,6 +41,7 @@ pwm_info(struct nvkm_therm *therm, int line)
 		default:
 			break;
 		}
+		break;
 	default:
 		break;
 	}
diff --git a/drivers/hwmon/corsair-cpro.c b/drivers/hwmon/corsair-cpro.c
index 591929ec217a..fa6aa4fc8b52 100644
--- a/drivers/hwmon/corsair-cpro.c
+++ b/drivers/hwmon/corsair-cpro.c
@@ -310,6 +310,7 @@ static int ccp_write(struct device *dev, enum hwmon_sensor_types type,
 		default:
 			break;
 		}
+		break;
 	default:
 		break;
 	}
diff --git a/drivers/hwmon/max6621.c b/drivers/hwmon/max6621.c
index 367855d5edae..7821132e17fa 100644
--- a/drivers/hwmon/max6621.c
+++ b/drivers/hwmon/max6621.c
@@ -156,7 +156,7 @@ max6621_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr,
 		default:
 			break;
 		}
-
+		break;
 	default:
 		break;
 	}
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index aef3fccc27a9..598e5e6ace18 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -2184,6 +2184,7 @@ static int bnxt_hwrm_handler(struct bnxt *bp, struct tx_cmp *txcmp)
 	case CMPL_BASE_TYPE_HWRM_ASYNC_EVENT:
 		bnxt_async_event_process(bp,
 					 (struct hwrm_async_event_cmpl *)txcmp);
+		break;
 
 	default:
 		break;
diff --git a/drivers/net/ethernet/neterion/vxge/vxge-config.c b/drivers/net/ethernet/neterion/vxge/vxge-config.c
index 5162b938a1ac..b47d74743f5a 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-config.c
+++ b/drivers/net/ethernet/neterion/vxge/vxge-config.c
@@ -3784,6 +3784,7 @@ vxge_hw_rts_rth_data0_data1_get(u32 j, u64 *data0, u64 *data1,
 			VXGE_HW_RTS_ACCESS_STEER_DATA1_RTH_ITEM1_ENTRY_EN |
 			VXGE_HW_RTS_ACCESS_STEER_DATA1_RTH_ITEM1_BUCKET_DATA(
 			itable[j]);
+		return;
 	default:
 		return;
 	}
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
index b3cabc274121..3b8e675087de 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
@@ -103,6 +103,7 @@ nfp_repr_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
 	case NFP_PORT_PF_PORT:
 	case NFP_PORT_VF_PORT:
 		nfp_repr_vnic_get_stats64(repr->port, stats);
+		break;
 	default:
 		break;
 	}
diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c
index 08f9477d2ee8..35ec9aab3dc7 100644
--- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c
+++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c
@@ -1685,6 +1685,7 @@ netxen_process_rcv_ring(struct nx_host_sds_ring *sds_ring, int max)
 			break;
 		case NETXEN_NIC_RESPONSE_DESC:
 			netxen_handle_fw_message(desc_cnt, consumer, sds_ring);
+			goto skip;
 		default:
 			goto skip;
 		}
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c
index bdf15d2a6431..af4c516a9e7c 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c
@@ -1390,6 +1390,7 @@ static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int ma
 			break;
 		case QLCNIC_RESPONSE_DESC:
 			qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
+			goto skip;
 		default:
 			goto skip;
 		}
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
index 3beafc60747e..918220ad0d53 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
@@ -3456,6 +3456,7 @@ wait_npar:
 			adapter->fw_wait_cnt = 0;
 			return;
 		}
+		break;
 	case QLCNIC_DEV_FAILED:
 		break;
 	default:
diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
index 480d294a23ab..2b37bc408fc3 100644
--- a/drivers/tee/tee_core.c
+++ b/drivers/tee/tee_core.c
@@ -452,6 +452,7 @@ static int params_to_user(struct tee_ioctl_param __user *uparams,
 		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
 			if (put_user((u64)p->u.memref.size, &up->b))
 				return -EFAULT;
+			break;
 		default:
 			break;
 		}
diff --git a/drivers/watchdog/machzwd.c b/drivers/watchdog/machzwd.c
index 743377c5b173..73f2221f6222 100644
--- a/drivers/watchdog/machzwd.c
+++ b/drivers/watchdog/machzwd.c
@@ -174,6 +174,7 @@ static inline void zf_set_timer(unsigned short new, unsigned char n)
 		fallthrough;
 	case WD2:
 		zf_writeb(COUNTER_2, new > 0xff ? 0xff : new);
+		fallthrough;
 	default:
 		return;
 	}
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index 017db70d0f48..3d7a35d6a18b 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -132,6 +132,7 @@ int search_by_entry_key(struct super_block *sb, const struct cpu_key *key,
 			return IO_ERROR;
 		}
 		PATH_LAST_POSITION(path)--;
+		break;
 
 	case ITEM_FOUND:
 		break;
diff --git a/fs/xfs/libxfs/xfs_ag_resv.c b/fs/xfs/libxfs/xfs_ag_resv.c
index bbfea8022a3b..e0d5cdc57cc2 100644
--- a/fs/xfs/libxfs/xfs_ag_resv.c
+++ b/fs/xfs/libxfs/xfs_ag_resv.c
@@ -366,7 +366,7 @@ xfs_ag_resv_alloc_extent(
 		break;
 	default:
 		ASSERT(0);
-		/* fall through */
+		fallthrough;
 	case XFS_AG_RESV_NONE:
 		field = args->wasdel ? XFS_TRANS_SB_RES_FDBLOCKS :
 				       XFS_TRANS_SB_FDBLOCKS;
@@ -408,7 +408,7 @@ xfs_ag_resv_free_extent(
 		break;
 	default:
 		ASSERT(0);
-		/* fall through */
+		fallthrough;
 	case XFS_AG_RESV_NONE:
 		xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, (int64_t)len);
 		return;
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 82b7cbb1f24f..af3d5f9271f6 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -3174,7 +3174,7 @@ xfs_alloc_vextent(
 		}
 		args->agbno = XFS_FSB_TO_AGBNO(mp, args->fsbno);
 		args->type = XFS_ALLOCTYPE_NEAR_BNO;
-		/* FALLTHROUGH */
+		fallthrough;
 	case XFS_ALLOCTYPE_FIRST_AG:
 		/*
 		 * Rotate through the allocation groups looking for a winner.
diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c
index 83ac9771bfb5..747ec77912c3 100644
--- a/fs/xfs/libxfs/xfs_da_btree.c
+++ b/fs/xfs/libxfs/xfs_da_btree.c
@@ -282,7 +282,7 @@ xfs_da3_node_read_verify(
 						__this_address);
 				break;
 			}
-			/* fall through */
+			fallthrough;
 		case XFS_DA_NODE_MAGIC:
 			fa = xfs_da3_node_verify(bp);
 			if (fa)
diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c
index 7a2f9b5f2db5..f96e84793cc9 100644
--- a/fs/xfs/scrub/agheader.c
+++ b/fs/xfs/scrub/agheader.c
@@ -86,6 +86,7 @@ xchk_superblock(
 	case -ENOSYS:
 	case -EFBIG:
 		error = -EFSCORRUPTED;
+		fallthrough;
 	default:
 		break;
 	}
diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c
index b5ebf1d1b4db..77d5c4a0f09f 100644
--- a/fs/xfs/scrub/bmap.c
+++ b/fs/xfs/scrub/bmap.c
@@ -271,7 +271,7 @@ xchk_bmap_iextent_xref(
 	case XFS_DATA_FORK:
 		if (xfs_is_reflink_inode(info->sc->ip))
 			break;
-		/* fall through */
+		fallthrough;
 	case XFS_ATTR_FORK:
 		xchk_xref_is_not_shared(info->sc, agbno,
 				irec->br_blockcount);
diff --git a/fs/xfs/scrub/btree.c b/fs/xfs/scrub/btree.c
index a94bd8122c60..bd1172358964 100644
--- a/fs/xfs/scrub/btree.c
+++ b/fs/xfs/scrub/btree.c
@@ -44,7 +44,7 @@ __xchk_btree_process_error(
 		/* Note the badness but don't abort. */
 		sc->sm->sm_flags |= errflag;
 		*error = 0;
-		/* fall through */
+		fallthrough;
 	default:
 		if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE)
 			trace_xchk_ifork_btree_op_error(sc, cur, level,
diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c
index be38c960da85..6cc92291c46f 100644
--- a/fs/xfs/scrub/common.c
+++ b/fs/xfs/scrub/common.c
@@ -83,7 +83,7 @@ __xchk_process_error(
 		/* Note the badness but don't abort. */
 		sc->sm->sm_flags |= errflag;
 		*error = 0;
-		/* fall through */
+		fallthrough;
 	default:
 		trace_xchk_op_error(sc, agno, bno, *error,
 				ret_ip);
@@ -136,7 +136,7 @@ __xchk_fblock_process_error(
 		/* Note the badness but don't abort. */
 		sc->sm->sm_flags |= errflag;
 		*error = 0;
-		/* fall through */
+		fallthrough;
 	default:
 		trace_xchk_file_op_error(sc, whichfork, offset, *error,
 				ret_ip);
@@ -696,7 +696,7 @@ xchk_get_inode(
 		if (error)
 			return -ENOENT;
 		error = -EFSCORRUPTED;
-		/* fall through */
+		fallthrough;
 	default:
 		trace_xchk_op_error(sc,
 				XFS_INO_TO_AGNO(mp, sc->sm->sm_ino),
diff --git a/fs/xfs/scrub/dabtree.c b/fs/xfs/scrub/dabtree.c
index 653f3280e1c1..9f0dbb47c82c 100644
--- a/fs/xfs/scrub/dabtree.c
+++ b/fs/xfs/scrub/dabtree.c
@@ -47,7 +47,7 @@ xchk_da_process_error(
 		/* Note the badness but don't abort. */
 		sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT;
 		*error = 0;
-		/* fall through */
+		fallthrough;
 	default:
 		trace_xchk_file_op_error(sc, ds->dargs.whichfork,
 				xfs_dir2_da_to_db(ds->dargs.geo,
diff --git a/fs/xfs/scrub/repair.c b/fs/xfs/scrub/repair.c
index c2857d854c83..b8202dd08939 100644
--- a/fs/xfs/scrub/repair.c
+++ b/fs/xfs/scrub/repair.c
@@ -947,7 +947,7 @@ xrep_ino_dqattach(
 			xrep_force_quotacheck(sc, XFS_DQTYPE_GROUP);
 		if (XFS_IS_PQUOTA_ON(sc->mp) && !sc->ip->i_pdquot)
 			xrep_force_quotacheck(sc, XFS_DQTYPE_PROJ);
-		/* fall through */
+		fallthrough;
 	case -ESRCH:
 		error = 0;
 		break;
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 0936f3a96fe6..2988efa97e14 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -286,7 +286,7 @@ xfs_bmap_count_blocks(
 		 */
 		*count += btblocks - 1;
 
-		/* fall through */
+		fallthrough;
 	case XFS_DINODE_FMT_EXTENTS:
 		*nextents = xfs_bmap_count_leaves(ifp, count);
 		break;
diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index 465fd9e048d4..1da59bdff245 100644
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -84,7 +84,7 @@ xfs_fs_encode_fh(
 	case FILEID_INO32_GEN_PARENT:
 		fid->i32.parent_ino = XFS_I(parent)->i_ino;
 		fid->i32.parent_gen = parent->i_generation;
-		/*FALLTHRU*/
+		fallthrough;
 	case FILEID_INO32_GEN:
 		fid->i32.ino = XFS_I(inode)->i_ino;
 		fid->i32.gen = inode->i_generation;
@@ -92,7 +92,7 @@ xfs_fs_encode_fh(
 	case FILEID_INO32_GEN_PARENT | XFS_FILEID_TYPE_64FLAG:
 		fid64->parent_ino = XFS_I(parent)->i_ino;
 		fid64->parent_gen = parent->i_generation;
-		/*FALLTHRU*/
+		fallthrough;
 	case FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG:
 		fid64->ino = XFS_I(inode)->i_ino;
 		fid64->gen = inode->i_generation;
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 396ef36dcd0a..3c0749ab9e40 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -863,7 +863,7 @@ xfs_break_layouts(
 			error = xfs_break_dax_layouts(inode, &retry);
 			if (error || retry)
 				break;
-			/* fall through */
+			fallthrough;
 		case BREAK_WRITE:
 			error = xfs_break_leased_layouts(inode, iolock, &retry);
 			break;
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index e4c2da4566f1..1db99a909b23 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -877,7 +877,7 @@ xfs_init_new_inode(
 			xfs_inode_inherit_flags(ip, pip);
 		if (pip && (pip->i_diflags2 & XFS_DIFLAG2_ANY))
 			xfs_inode_inherit_flags2(ip, pip);
-		/* FALLTHROUGH */
+		fallthrough;
 	case S_IFLNK:
 		ip->i_df.if_format = XFS_DINODE_FMT_EXTENTS;
 		ip->i_df.if_bytes = 0;
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 1fe4c1fc0aea..7b1796cede10 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -558,7 +558,7 @@ xfs_ioc_attrmulti_one(
 	case ATTR_OP_REMOVE:
 		value = NULL;
 		*len = 0;
-		/* fall through */
+		fallthrough;
 	case ATTR_OP_SET:
 		error = mnt_want_write_file(parfilp);
 		if (error)
@@ -1511,7 +1511,7 @@ xfs_ioc_getbmap(
 	switch (cmd) {
 	case XFS_IOC_GETBMAPA:
 		bmx.bmv_iflags = BMV_IF_ATTRFORK;
-		/*FALLTHRU*/
+		fallthrough;
 	case XFS_IOC_GETBMAP:
 		/* struct getbmap is a strict subset of struct getbmapx. */
 		recsize = sizeof(struct getbmap);
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index d154f42e2dc6..d8cd2583dedb 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -1036,7 +1036,7 @@ retry:
 			prealloc_blocks = 0;
 			goto retry;
 		}
-		/*FALLTHRU*/
+		fallthrough;
 	default:
 		goto out_unlock;
 	}
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index c19a82adea1e..a002425377b5 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -2626,6 +2626,7 @@ xlog_covered_state(
 	case XLOG_STATE_COVER_IDLE:
 		if (iclogs_changed == 1)
 			return XLOG_STATE_COVER_IDLE;
+		fallthrough;
 	case XLOG_STATE_COVER_NEED:
 	case XLOG_STATE_COVER_NEED2:
 		break;
diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 9aced0a00003..d11d032da0b4 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -294,7 +294,7 @@ xfs_trans_read_buf_map(
 	default:
 		if (tp && (tp->t_flags & XFS_TRANS_DIRTY))
 			xfs_force_shutdown(tp->t_mountp, SHUTDOWN_META_IO_ERROR);
-		/* fall through */
+		fallthrough;
 	case -ENOMEM:
 	case -EAGAIN:
 		return error;
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 36ed85bf2ad5..fab0958c41be 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -450,6 +450,7 @@ static int ah4_err(struct sk_buff *skb, u32 info)
 	case ICMP_DEST_UNREACH:
 		if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 			return 0;
+		break;
 	case ICMP_REDIRECT:
 		break;
 	default:
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 35803ab7ac80..8e3b445a8c21 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -982,6 +982,7 @@ static int esp4_err(struct sk_buff *skb, u32 info)
 	case ICMP_DEST_UNREACH:
 		if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 			return 0;
+		break;
 	case ICMP_REDIRECT:
 		break;
 	default:
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index a632b66bc13a..4c0c33e4710d 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1874,6 +1874,7 @@ static int call_fib_nh_notifiers(struct fib_nh *nh,
 		    (nh->fib_nh_flags & RTNH_F_DEAD))
 			return call_fib4_notifiers(dev_net(nh->fib_nh_dev),
 						   event_type, &info.info);
+		break;
 	default:
 		break;
 	}
diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index 31c6c6d99d5e..eb560eecee08 100644
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -351,6 +351,7 @@ static int vti4_err(struct sk_buff *skb, u32 info)
 	case ICMP_DEST_UNREACH:
 		if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 			return 0;
+		break;
 	case ICMP_REDIRECT:
 		break;
 	default:
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index b42683212c65..bbb56f5e06dd 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -31,6 +31,7 @@ static int ipcomp4_err(struct sk_buff *skb, u32 info)
 	case ICMP_DEST_UNREACH:
 		if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 			return 0;
+		break;
 	case ICMP_REDIRECT:
 		break;
 	default:
diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c
index 78da5eab252a..de0456073dc0 100644
--- a/net/netrom/nr_route.c
+++ b/net/netrom/nr_route.c
@@ -266,6 +266,7 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic,
 		fallthrough;
 	case 2:
 		re_sort_routes(nr_node, 0, 1);
+		break;
 	case 1:
 		break;
 	}
@@ -359,6 +360,7 @@ static int nr_del_node(ax25_address *callsign, ax25_address *neighbour, struct n
 					fallthrough;
 				case 1:
 					nr_node->routes[1] = nr_node->routes[2];
+					fallthrough;
 				case 2:
 					break;
 				}
@@ -482,6 +484,7 @@ static int nr_dec_obs(void)
 					fallthrough;
 				case 1:
 					s->routes[1] = s->routes[2];
+					break;
 				case 2:
 					break;
 				}
@@ -529,6 +532,7 @@ void nr_rt_device_down(struct net_device *dev)
 							fallthrough;
 						case 1:
 							t->routes[1] = t->routes[2];
+							break;
 						case 2:
 							break;
 						}
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 330ba68828e7..d56941d51e20 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1656,6 +1656,7 @@ static int fanout_add(struct sock *sk, struct fanout_args *args)
 	case PACKET_FANOUT_ROLLOVER:
 		if (type_flags & PACKET_FANOUT_FLAG_ROLLOVER)
 			return -EINVAL;
+		break;
 	case PACKET_FANOUT_HASH:
 	case PACKET_FANOUT_LB:
 	case PACKET_FANOUT_CPU:
diff --git a/net/rds/tcp_connect.c b/net/rds/tcp_connect.c
index 4e64598176b0..5461d77fff4f 100644
--- a/net/rds/tcp_connect.c
+++ b/net/rds/tcp_connect.c
@@ -78,6 +78,7 @@ void rds_tcp_state_change(struct sock *sk)
 	case TCP_CLOSE_WAIT:
 	case TCP_CLOSE:
 		rds_conn_path_drop(cp, false);
+		break;
 	default:
 		break;
 	}
diff --git a/net/rds/threads.c b/net/rds/threads.c
index 32dc50f0a303..1f424cbfcbb4 100644
--- a/net/rds/threads.c
+++ b/net/rds/threads.c
@@ -208,6 +208,7 @@ void rds_send_worker(struct work_struct *work)
 		case -ENOMEM:
 			rds_stats_inc(s_send_delayed_retry);
 			queue_delayed_work(rds_wq, &cp->cp_send_w, 2);
+			break;
 		default:
 			break;
 		}
@@ -232,6 +233,7 @@ void rds_recv_worker(struct work_struct *work)
 		case -ENOMEM:
 			rds_stats_inc(s_recv_delayed_retry);
 			queue_delayed_work(rds_wq, &cp->cp_recv_w, 2);
+			break;
 		default:
 			break;
 		}
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index 41671af6b33f..2b5f89713e36 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -471,6 +471,7 @@ static int rxrpc_connect(struct socket *sock, struct sockaddr *addr,
 	switch (rx->sk.sk_state) {
 	case RXRPC_UNBOUND:
 		rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
+		break;
 	case RXRPC_CLIENT_UNBOUND:
 	case RXRPC_CLIENT_BOUND:
 		break;
diff --git a/net/sctp/input.c b/net/sctp/input.c
index d508f6f3dd08..5ceaf75105ba 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -633,7 +633,7 @@ int sctp_v4_err(struct sk_buff *skb, __u32 info)
 		break;
 	case ICMP_REDIRECT:
 		sctp_icmp_redirect(sk, transport, skb);
-		/* Fall through to out_unlock. */
+		goto out_unlock;
 	default:
 		goto out_unlock;
 	}
@@ -1236,6 +1236,7 @@ static struct sctp_association *__sctp_rcv_walk_lookup(struct net *net,
 						net, ch, laddr,
 						sctp_hdr(skb)->source,
 						transportp);
+			break;
 		default:
 			break;
 		}
diff --git a/net/tipc/link.c b/net/tipc/link.c
index c44b4bfaaee6..1b7a487c8841 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -654,6 +654,7 @@ int tipc_link_fsm_evt(struct tipc_link *l, int evt)
 			break;
 		case LINK_FAILOVER_BEGIN_EVT:
 			l->state = LINK_FAILINGOVER;
+			break;
 		case LINK_FAILURE_EVT:
 		case LINK_RESET_EVT:
 		case LINK_ESTABLISH_EVT:
diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c
index 8831f5a9e992..41de46b5ffa9 100644
--- a/net/xfrm/xfrm_interface.c
+++ b/net/xfrm/xfrm_interface.c
@@ -432,6 +432,7 @@ static int xfrmi4_err(struct sk_buff *skb, u32 info)
 	case ICMP_DEST_UNREACH:
 		if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 			return 0;
+		break;
 	case ICMP_REDIRECT:
 		break;
 	default: