Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 26a7fe5..5508baa 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -159,6 +159,9 @@
 			ret = err;
 	}
 out:
+	err = file_check_and_advance_wb_err(file);
+	if (ret == 0)
+		ret = err;
 	trace_ext4_sync_file_exit(inode, ret);
 	return ret;
 }