f2fs: fix to show correct discard_granularity in sysfs

Fix below incorrect display when reading discard_granularity sysfs node.

$ cat /sys/fs/f2fs/<device>/discard_granularity
$ 16
$ echo 32 > /sys/fs/f2fs/<device>/discard_granularity
$ cat /sys/fs/f2fs/<device>/discard_granularity
$ 16

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 962735dc9c63..e2c258f717cd 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -170,6 +170,8 @@ static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
                                 dcc->pend_list_tag[i] &= (~P_ACTIVE);
                 }
                 mutex_unlock(&dcc->cmd_lock);
+
+                *ui = t;
                 return count;
         }