quoted

 }

+static int mvpp2_get_sram(struct platform_device *pdev,
+			  struct mvpp2 *priv)
+{
+	struct device_node *dn = pdev->dev.of_node;
+	static bool defer_once;
+	struct resource *res;
+
+	if (has_acpi_companion(&pdev->dev)) {
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+		if (!res) {
+			dev_warn(&pdev->dev, "ACPI is too old, Flow control

not supported\n");

quoted

+			return 0;
+		}
+		priv->cm3_base = devm_ioremap_resource(&pdev->dev,

res);

quoted

+		if (IS_ERR(priv->cm3_base))
+			return PTR_ERR(priv->cm3_base);
+	} else {
+		priv->sram_pool = of_gen_pool_get(dn, "cm3-mem", 0);
+		if (!priv->sram_pool) {
+			if (!defer_once) {
+				defer_once = true;
+				/* Try defer once */
+				return -EPROBE_DEFER;
+			}
+			dev_warn(&pdev->dev, "DT is too old, Flow control

not

quoted

+supported\n");

This warning will show on every DT system with no cm3-mem property,
right?

All DT system would has cm3-mem property if " add CM3 SRAM memory to cp11x ethernet device tree " patch applied.
This is also only warning message, without any functional impact.

Regards,
Stefan.