dm raid: fix raid10 device size error on out-of-place reshape

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/dm-raid.c

@@ -622,8 +622,16 @@ static struct raid_type *get_raid_type_by_ll(const int level, const int layout)
 static void rs_set_capacity(struct raid_set *rs)
 {
 	struct mddev *mddev = &rs->md;
+	struct md_rdev *rdev;
 	struct gendisk *gendisk = dm_disk(dm_table_get_md(rs->ti->table));
 
+	/*
+	 * raid10 sets rdev->sector to the device size, which
+	 * is unintended in case of out-of-place reshaping
+	 */
+	rdev_for_each(rdev, mddev)
+		rdev->sectors = mddev->dev_sectors;
+
 	set_capacity(gendisk, mddev->array_sectors);
 	revalidate_disk(gendisk);
 }