linux-kernel - [PATCH 3.10 066/139] md: fix super_offset endianness in super_1_rdev_size

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Message-Id: <1509571600-4858-17-git-send-email-w@1wt.eu>
Date:   Wed,  1 Nov 2017 22:26:07 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Jason Yan <yanaijie@...wei.com>, Shaohua Li <shli@...com>,
        Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 066/139] md: fix super_offset endianness in super_1_rdev_size_change

From: Jason Yan <yanaijie@...wei.com>

commit 3fb632e40d7667d8bedfabc28850ac06d5493f54 upstream.

The sb->super_offset should be big-endian, but the rdev->sb_start is in
host byte order, so fix this by adding cpu_to_le64.

Signed-off-by: Jason Yan <yanaijie@...wei.com>
Signed-off-by: Shaohua Li <shli@...com>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/md/md.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 7c45286..95eb53f 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1898,7 +1898,7 @@ super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors)
 	}
 	sb = page_address(rdev->sb_page);
 	sb->data_size = cpu_to_le64(num_sectors);
-	sb->super_offset = rdev->sb_start;
+	sb->super_offset = cpu_to_le64(rdev->sb_start);
 	sb->sb_csum = calc_sb_1_csum(sb);
 	md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size,
 		       rdev->sb_page);
-- 
2.8.0.rc2.1.gbe9624a