f2fs: don't drop any page on f2fs_cp_error() case

We still provide readdir() after shtudown, so we should keep pages to avoid
additional IOs.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/node.c

@@ -1376,11 +1376,8 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted,
 
 	trace_f2fs_writepage(page, NODE);
 
-	if (unlikely(f2fs_cp_error(sbi))) {
-		dec_page_count(sbi, F2FS_DIRTY_NODES);
-		unlock_page(page);
-		return 0;
-	}
+	if (unlikely(f2fs_cp_error(sbi)))
+		goto redirty_out;
 
 	if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
 		goto redirty_out;