[PATCH] Btrfs: fix max dir item size calculation

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We were accounting for sizeof(struct btrfs_item) twice, once
in the data_size variable and another time in the if statement
below.

Signed-off-by: Filipe David Borba Manana <fdmanana@xxxxxxxxx>
---
 fs/btrfs/dir-item.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index c031ea3..9a89ceb 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -261,7 +261,7 @@ int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
 	 * see if there is room in the item to insert this
 	 * name
 	 */
-	data_size = sizeof(*di) + name_len + sizeof(struct btrfs_item);
+	data_size = sizeof(*di) + name_len;
 	leaf = path->nodes[0];
 	slot = path->slots[0];
 	if (data_size + btrfs_item_size_nr(leaf, slot) +
-- 
1.7.9.5

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