diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 1c2eb38f3c51a6..0138a727c1f3c2 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1512,14 +1512,16 @@ static int _enough(struct r10conf *conf, struct geom *geo, int ignore)
 	do {
 		int n = conf->copies;
 		int cnt = 0;
+		int this = first;
 		while (n--) {
-			if (conf->mirrors[first].rdev &&
-			    first != ignore)
+			if (conf->mirrors[this].rdev &&
+			    this != ignore)
 				cnt++;
-			first = (first+1) % geo->raid_disks;
+			this = (this+1) % geo->raid_disks;
 		}
 		if (cnt == 0)
 			return 0;
+		first = (first + geo->near_copies) % geo->raid_disks;
 	} while (first != 0);
 	return 1;
 }
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 7031b865b3a030..0689173fd9f568 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1591,6 +1591,7 @@ static int resize_stripes(struct r5conf *conf, int newsize)
 		#ifdef CONFIG_MULTICORE_RAID456
 		init_waitqueue_head(&nsh->ops.wait_for_ops);
 		#endif
+		spin_lock_init(&nsh->stripe_lock);
 
 		list_add(&nsh->lru, &newstripes);
 	}