1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 688ecb4c39f3..402f3a20ec0a 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -489,6 +489,7 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
         ibdev->uar_map = ioremap(ibdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
         if (!ibdev->uar_map)
                 goto err_uar;
+        MLX4_INIT_DOORBELL_LOCK(&ibdev->uar_lock);
 
         INIT_LIST_HEAD(&ibdev->pgdir_list);
         mutex_init(&ibdev->pgdir_mutex);