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SubjectRe: [PATCH RFC net-next 03/19] net: mvpp2: add CM3 SRAM memory map
> +static int mvpp2_get_sram(struct platform_device *pdev,
> + struct mvpp2 *priv)
> +{
> + struct device_node *dn = pdev->dev.of_node;
> + 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, TX FC disabled\n");
> + return 0;
> + }
> + priv->cm3_base = devm_ioremap_resource(&pdev->dev, res);
> + 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) {
> + dev_warn(&pdev->dev, "DT is too old, TX FC disabled\n");
> + return 0;
> + }
> + priv->cm3_base = (void __iomem *)gen_pool_alloc(priv->sram_pool,
> + MSS_SRAM_SIZE);
> + if (!priv->cm3_base)
> + return -ENOMEM;

Should there be -EPROBE_DEFER handling in here somewhere? The SRAM is
a device, so it might not of been probed yet?

Andrew

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