1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c b/drivers/infiniband/hw/mthca/mthca_cq.c
index 6bd9f1393349..1e1e336d3ef9 100644
--- a/drivers/infiniband/hw/mthca/mthca_cq.c
+++ b/drivers/infiniband/hw/mthca/mthca_cq.c
@@ -473,7 +473,7 @@ static void handle_error_cqe(struct mthca_dev *dev, struct mthca_cq *cq,
         if (!(new_wqe & cpu_to_be32(0x3f)) || (!cqe->db_cnt && dbd))
                 return;
 
-        cqe->db_cnt   = cpu_to_be16(be16_to_cpu(cqe->db_cnt) - dbd);
+        be16_add_cpu(&cqe->db_cnt, -dbd);
         cqe->wqe      = new_wqe;
         cqe->syndrome = SYNDROME_WR_FLUSH_ERR;