From ffb81717a166b3c4a676ada61283b3121448e503 Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Date: Fri, 20 Nov 2020 12:26:46 -0600
Subject: [PATCH] nfs: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly add multiple break/goto/return/fallthrough
statements instead of just letting the code fall through to the next
case.

Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
 fs/nfs/nfs3acl.c    | 1 +
 fs/nfs/nfs4client.c | 1 +
 fs/nfs/nfs4proc.c   | 2 ++
 fs/nfs/nfs4state.c  | 1 +
 fs/nfs/pnfs.c       | 2 ++
 5 files changed, 7 insertions(+)

diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index c6c863382f37..68e206cf4c4e 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -111,6 +111,7 @@ struct posix_acl *nfs3_get_acl(struct inode *inode, int type)
 			fallthrough;
 		case -ENOTSUPP:
 			status = -EOPNOTSUPP;
+			goto getout;
 		default:
 			goto getout;
 	}
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 86acffe7335c..889a9f4c0310 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -609,6 +609,7 @@ found:
 			 * changed. Schedule recovery!
 			 */
 			nfs4_schedule_path_down_recovery(pos);
+			goto out;
 		default:
 			goto out;
 		}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 224773eb61b1..34570a7785fa 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2227,6 +2227,7 @@ static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct
 		default:
 			printk(KERN_ERR "NFS: %s: unhandled error "
 					"%d.\n", __func__, err);
+			fallthrough;
 		case 0:
 		case -ENOENT:
 		case -EAGAIN:
@@ -9701,6 +9702,7 @@ nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
 	case -NFS4ERR_BADLAYOUT:     /* no layout */
 	case -NFS4ERR_GRACE:	    /* loca_recalim always false */
 		task->tk_status = 0;
+		break;
 	case 0:
 		break;
 	default:
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 4bf10792cb5b..3a51351bdc6a 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1125,6 +1125,7 @@ static void nfs_increment_seqid(int status, struct nfs_seqid *seqid)
 					" sequence-id error on an"
 					" unconfirmed sequence %p!\n",
 					seqid->sequence);
+			return;
 		case -NFS4ERR_STALE_CLIENTID:
 		case -NFS4ERR_STALE_STATEID:
 		case -NFS4ERR_BAD_STATEID:
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index af64b4e6fd1f..102b66e0bdef 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -2875,6 +2875,7 @@ pnfs_do_write(struct nfs_pageio_descriptor *desc,
 	switch (trypnfs) {
 	case PNFS_NOT_ATTEMPTED:
 		pnfs_write_through_mds(desc, hdr);
+		break;
 	case PNFS_ATTEMPTED:
 		break;
 	case PNFS_TRY_AGAIN:
@@ -3019,6 +3020,7 @@ pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr)
 	switch (trypnfs) {
 	case PNFS_NOT_ATTEMPTED:
 		pnfs_read_through_mds(desc, hdr);
+		break;
 	case PNFS_ATTEMPTED:
 		break;
 	case PNFS_TRY_AGAIN: