1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 4db34edfd87f..7f636283a1ba 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2060,7 +2060,13 @@ static int run(mddev_t *mddev)
         /*
          * Ok, everything is just fine now
          */
-        size = conf->stride * conf->raid_disks;
+        if (conf->far_offset) {
+                size = mddev->size >> (conf->chunk_shift-1);
+                size *= conf->raid_disks;
+                size <<= conf->chunk_shift;
+                sector_div(size, conf->far_copies);
+        } else
+                size = conf->stride * conf->raid_disks;
         sector_div(size, conf->near_copies);
         mddev->array_size = size/2;
         mddev->resync_max_sectors = size;