Btrfs: fix oops after block group lookup

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 2 insertions, 6 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 2b24a5a2be63..9749090cfbb8 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -62,7 +62,6 @@ static void btrfs_read_locked_inode(struct inode *inode)
         struct btrfs_inode_item *inode_item;
         struct btrfs_root *root = BTRFS_I(inode)->root;
         struct btrfs_key location;
-        struct btrfs_block_group_cache *alloc_group;
         u64 alloc_group_block;
         int ret;
 
@@ -95,11 +94,8 @@ static void btrfs_read_locked_inode(struct inode *inode)
         inode->i_blocks = btrfs_inode_nblocks(inode_item);
         inode->i_generation = btrfs_inode_generation(inode_item);
         alloc_group_block = btrfs_inode_block_group(inode_item);
-        ret = radix_tree_gang_lookup(&root->fs_info->block_group_radix,
-                                     (void **)&alloc_group,
-                                     alloc_group_block, 1);
-        BUG_ON(!ret);
-        BTRFS_I(inode)->block_group = alloc_group;
+        BTRFS_I(inode)->block_group = btrfs_lookup_block_group(root->fs_info,
+                                                       alloc_group_block);
 
         btrfs_free_path(path);
         inode_item = NULL;