Btrfs: check btrfs_get_extent return for IS_ERR()
authorDan Carpenter <error27@gmail.com>
Sat, 20 Mar 2010 11:22:10 +0000 (11:22 +0000)
committerChris Mason <chris.mason@oracle.com>
Wed, 31 Mar 2010 01:19:09 +0000 (21:19 -0400)
btrfs_get_extent() never returns NULL, only a valid pointer or ERR_PTR()

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
fs/btrfs/ioctl.c

index 74d89133f76866786c3df6c19a48000fd51674e5..2b7dd88fc54f22c63a4fe7cf1737d913f3bf3bad 100644 (file)
@@ -510,7 +510,7 @@ static int should_defrag_range(struct inode *inode, u64 start, u64 len,
                em = btrfs_get_extent(inode, NULL, 0, start, len, 0);
                unlock_extent(io_tree, start, start + len - 1, GFP_NOFS);
 
-               if (!em)
+               if (IS_ERR(em))
                        return 0;
        }