1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 5d88329e3c7a..b65b8cfbdf30 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1789,6 +1789,11 @@ static int run(mddev_t *mddev)
                        mdname(mddev), mddev->level);
                 goto out;
         }
+        if (mddev->reshape_position != MaxSector) {
+                printk("raid1: %s: reshape_position set but not supported\n",
+                       mdname(mddev));
+                goto out;
+        }
         /*
          * copy the already verified devices into our private RAID1
          * bookkeeping area. [whatever we allocate in run(),