diff --git a/drivers/infiniband/hw/mlx5/cong.c b/drivers/infiniband/hw/mlx5/cong.c
index 98c90d0dbab4..e91bf278ab97 100644
--- a/drivers/infiniband/hw/mlx5/cong.c
+++ b/drivers/infiniband/hw/mlx5/cong.c
@@ -389,15 +389,13 @@ static ssize_t get_param(struct file *filp, char __user *buf, size_t count,
 	int offset = param->offset;
 	u32 var = 0;
 	int ret;
-	char lbuf[11];
+	char lbuf[12];
 
 	ret = mlx5_ib_get_cc_params(param->dev, param->port_num, offset, &var);
 	if (ret)
 		return ret;
 
-	ret = snprintf(lbuf, sizeof(lbuf), "%d\n", var);
-	if (ret < 0)
-		return ret;
+	ret = scnprintf(lbuf, sizeof(lbuf), "%u\n", var);
 
 	return simple_read_from_buffer(buf, count, pos, lbuf, ret);
 }