diff --git a/drivers/md/md.c b/drivers/md/md.c
index 8f161743e18f2d6e1dab930e567de975879a6798..67bb0d0467671dabe3bbd692c8518b3c81e151de 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1081,7 +1081,7 @@ static int super_1_validate(mddev_t *mddev, mdk_rdev_t *rdev)
 		mddev->size = le64_to_cpu(sb->size)/2;
 		mddev->events = le64_to_cpu(sb->events);
 		mddev->bitmap_offset = 0;
-		mddev->default_bitmap_offset = 1024;
+		mddev->default_bitmap_offset = 1024 >> 9;
 		
 		mddev->recovery_cp = le64_to_cpu(sb->resync_offset);
 		memcpy(mddev->uuid, sb->set_uuid, 16);
@@ -1162,7 +1162,7 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev)
 	sb->cnt_corrected_read = atomic_read(&rdev->corrected_errors);
 
 	sb->raid_disks = cpu_to_le32(mddev->raid_disks);
-	sb->size = cpu_to_le64(mddev->size);
+	sb->size = cpu_to_le64(mddev->size<<1);
 
 	if (mddev->bitmap && mddev->bitmap_file == NULL) {
 		sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_offset);
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index d03f99cf4b7dfa936af326eef8ceb0586709fd5a..678f4dbbea1d5c22082d13fb1afd321465b61f28 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -372,7 +372,7 @@ static int raid0_run (mddev_t *mddev)
 	kfree(conf);
 	mddev->private = NULL;
 out:
-	return 1;
+	return -ENOMEM;
 }
 
 static int raid0_stop (mddev_t *mddev)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 9130d051b474d64c4816644be4bc89d3b397f37a..ab90a6d1202043f7d332fe5f613be414845f1107 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -565,6 +565,8 @@ static int read_balance(conf_t *conf, r10bio_t *r10_bio)
 
 	if (disk >= 0 && (rdev=rcu_dereference(conf->mirrors[disk].rdev))!= NULL)
 		atomic_inc(&conf->mirrors[disk].rdev->nr_pending);
+	else
+		disk = -1;
 	rcu_read_unlock();
 
 	return disk;
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 25976bfb6f9c19b841aa432dff67c0c24a425435..2dba305daf3c887799453caefae8d5a36535de4b 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -350,7 +350,8 @@ static void shrink_stripes(raid5_conf_t *conf)
 	while (drop_one_stripe(conf))
 		;
 
-	kmem_cache_destroy(conf->slab_cache);
+	if (conf->slab_cache)
+		kmem_cache_destroy(conf->slab_cache);
 	conf->slab_cache = NULL;
 }
 
diff --git a/drivers/md/raid6main.c b/drivers/md/raid6main.c
index ed2abb2e2e2d43a5f22b2a5b51c3ebdd093cbf69..cd477ebf2ee44d8b963ec3157a5674300e1e85f5 100644
--- a/drivers/md/raid6main.c
+++ b/drivers/md/raid6main.c
@@ -366,7 +366,8 @@ static void shrink_stripes(raid6_conf_t *conf)
 	while (drop_one_stripe(conf))
 		;
 
-	kmem_cache_destroy(conf->slab_cache);
+	if (conf->slab_cache)
+		kmem_cache_destroy(conf->slab_cache);
 	conf->slab_cache = NULL;
 }