linux-kernel - [PATCH] f2fs: fix to show correct discard

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Date:   Tue, 12 Sep 2017 14:25:35 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     <jaegeuk@...nel.org>
CC:     <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>, <chao@...nel.org>,
        Chao Yu <yuchao0@...wei.com>
Subject: [PATCH] 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@...wei.com>
---
 fs/f2fs/sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

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;
 	}
 
-- 
2.13.1.388.g69e6b9b4f4a9