[PATCH 4.16 181/272] f2fs: fix to clear CP_TRIMMED_FLAG

[Greg Kroah-Hartman]

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Chao Yu <yuch...@huawei.com>

[ Upstream commit cd36d7a17f9da68be9aa67185ba3ad7969934a19 ]

Once CP_TRIMMED_FLAG is set, after a reboot, we will never issue discard
before LBA becomes invalid again, fix it by clearing the flag in
checkpoint without CP_TRIMMED reason.

Fixes: 1f43e2ad7bff ("f2fs: introduce CP_TRIMMED_FLAG to avoid unneeded 
discard")
Signed-off-by: Chao Yu <yuch...@huawei.com>
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 fs/f2fs/checkpoint.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1136,6 +1136,8 @@ static void update_ckpt_flags(struct f2f
 
        if (cpc->reason & CP_TRIMMED)
                __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
+       else
+               __clear_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
 
        if (cpc->reason & CP_UMOUNT)
                __set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);