From 1062a0c018296c6719e49b25bed206d414c18898 Mon Sep 17 00:00:00 2001
From: Chao Yu <yuchao0@huawei.com>
Date: Thu, 25 Jan 2018 18:57:27 +0800
Subject: [PATCH] f2fs: stop issuing discard if fs is readonly

If filesystem is readonly, stop to issue discard in daemon.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/segment.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 31c69c6660e7..6662c6caf477 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1486,6 +1486,8 @@ static int issue_discard_thread(void *data)
 				msecs_to_jiffies(wait_ms));
 		if (try_to_freeze())
 			continue;
+		if (f2fs_readonly(sbi->sb))
+			continue;
 		if (kthread_should_stop())
 			return 0;