nfs: Remove calls to folio_set_error

Common code doesn't test the error flag, so we don't need to set it in
nfs.  We can use folio_end_read() to combine the setting (or not)
of the uptodate flag and clearing the lock flag.

Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: linux-nfs@vger.kernel.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lore.kernel.org/r/20240530202110.2653630-10-willy@infradead.orgSigned-off-by: Christian Brauner <brauner@kernel.org>

fs/nfs/read.c

@@ -122,8 +122,6 @@ static void nfs_readpage_release(struct nfs_page *req, int error)
 {
 	struct folio *folio = nfs_page_to_folio(req);
 
-	if (nfs_error_is_fatal_on_server(error) && error != -ETIMEDOUT)
-		folio_set_error(folio);
 	if (nfs_page_group_sync_on_bit(req, PG_UNLOCKPAGE))
 		if (nfs_netfs_folio_unlock(folio))
 			folio_unlock(folio);

fs/nfs/symlink.c

@@ -32,16 +32,8 @@ static int nfs_symlink_filler(struct file *file, struct folio *folio)
 	int error;
 
 	error = NFS_PROTO(inode)->readlink(inode, &folio->page, 0, PAGE_SIZE);
-	if (error < 0)
-		goto error;
-	folio_mark_uptodate(folio);
-	folio_unlock(folio);
-	return 0;
-
-error:
-	folio_set_error(folio);
-	folio_unlock(folio);
-	return -EIO;
+	folio_end_read(folio, error == 0);
+	return error;
 }
 
 static const char *nfs_get_link(struct dentry *dentry,

fs/nfs/write.c

@@ -311,7 +311,6 @@ static void nfs_mapping_set_error(struct folio *folio, int error)
 {
 	struct address_space *mapping = folio_file_mapping(folio);
 
-	folio_set_error(folio);
 	filemap_set_wb_err(mapping, error);
 	if (mapping->host)
 		errseq_set(&mapping->host->i_sb->s_wb_err,