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Btrfs: clean up search_extent_mapping()

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rb_node returned by __tree_search() can be a valid pointer or NULL,
but won't be some errno.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Li Zefan 2011-07-14 03:18:03 +00:00 committed by Chris Mason
parent 85d85a743d
commit 7e016a038e
1 changed files with 3 additions and 14 deletions
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17
fs/btrfs/extent_map.c
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@ -379,23 +379,12 @@ struct extent_map *search_extent_mapping(struct extent_map_tree *tree,
em = rb_entry(next, struct extent_map, rb_node);
goto found;
}
if (!rb_node) {
em = NULL;
goto out;
}
if (IS_ERR(rb_node)) {
em = ERR_CAST(rb_node);
goto out;
}
if (!rb_node)
return NULL;
em = rb_entry(rb_node, struct extent_map, rb_node);
goto found;
em = NULL;
goto out;
found:
atomic_inc(&em->refs);
out:
return em;
}