[PATCH] md: Assorted little md fixes

- version-1 superblock
  + The default_bitmap_offset is in sectors, not bytes.
  + the 'size' field in the superblock is in sectors, not KB
- raid0_run should return a negative number on error, not '1'
- raid10_read_balance should not return a valid 'disk' number if
     ->rdev turned out to be NULL
- kmem_cache_destroy doesn't like being passed a NULL.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

5 files changed, 9 insertions, 5 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 8f161743e18..67bb0d04676 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 d03f99cf4b7..678f4dbbea1 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -372,7 +372,7 @@ out_free_conf:
         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 9130d051b47..ab90a6d1202 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -565,6 +565,8 @@ rb_out:
 
         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 25976bfb6f9..2dba305daf3 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 ed2abb2e2e2..cd477ebf2ee 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;
 }