diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 8f50e7342a76..3048d2d273d7 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -703,12 +703,8 @@ static int max_bfregs(struct mlx5_ib_dev *dev, struct mlx5_bfreg_info *bfregi)
 static int num_med_bfreg(struct mlx5_ib_dev *dev,
 			 struct mlx5_bfreg_info *bfregi)
 {
-	int n;
-
-	n = max_bfregs(dev, bfregi) - bfregi->num_low_latency_bfregs -
-	    NUM_NON_BLUE_FLAME_BFREGS;
-
-	return n >= 0 ? n : 0;
+	return max(0, max_bfregs(dev, bfregi) - bfregi->num_low_latency_bfregs -
+			      NUM_NON_BLUE_FLAME_BFREGS);
 }
 
 static int first_med_bfreg(struct mlx5_ib_dev *dev,