md: fix super_offset endianness in super_1_rdev_size_change

JasonYanHw · gregkh · commit ff62c63109d9 · 2017-07-15T11:57:49.000+02:00
commit 3fb632e40d7667d8bedfabc28850ac06d5493f54 upstream.

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

Signed-off-by: Jason Yan &lt;yanaijie@huawei.com&gt;
Signed-off-by: Shaohua Li &lt;shli@fb.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
diff --git a/drivers/md/md.c b/drivers/md/md.c
@@ -1866,7 +1866,7 @@ 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);

Original file line number	Diff line number	Diff line change
`@@ -1866,7 +1866,7 @@ super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors)`
`1866`	`1866`	`}`
`1867`	`1867`	`sb = page_address(rdev->sb_page);`
`1868`	`1868`	`sb->data_size = cpu_to_le64(num_sectors);`
`1869`		`- sb->super_offset = rdev->sb_start;`
	`1869`	`+ sb->super_offset = cpu_to_le64(rdev->sb_start);`
`1870`	`1870`	`sb->sb_csum = calc_sb_1_csum(sb);`
`1871`	`1871`	`md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size,`
`1872`	`1872`	`rdev->sb_page);`