Re: [PATCH v6 04/10] PCI: imx6: Correct controller_id generation logic for i.MX7D

Manivannan Sadhasivam
2024-11-15T06:43:32Z

On Fri, Nov 01, 2024 at 03:06:04PM +0800, Richard Zhu wrote:
> i.MX7D only has one PCIe controller, so controller_id should always be 0.
> The previous code is incorrect although yielding the correct result. Fix by
> removing IMX7D from the switch case branch.
>

Worth adding a fixes tag?

> Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

> Reviewed-by: Frank Li <Frank.Li@nxp.com>
> ---
> "This is just *wrong*. You cannot hardcode the MMIO address in the driver.
> Even though this code is old, you should fix it instead of building on top
> of it.
>
> - Mani"
>
> IMX7D here is wrong athough check IMX8MQ_PCIE2_BASE_ADDR is not good
> method. Previously try to use 'linux,pci-domain' to replace this check
> logic. Need more discussion to improve it and keep old compatiblity.
> Let's fix this code error firstly.

I really hope that you'll fix it asap.

- Mani

> ---
> drivers/pci/controller/dwc/pci-imx6.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 462decd1d589..996333e9017d 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -1342,7 +1342,6 @@ static int imx_pcie_probe(struct platform_device *pdev)
> switch (imx_pcie->drvdata->variant) {
> case IMX8MQ:
> case IMX8MQ_EP:
> - case IMX7D:
> if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR)
> imx_pcie->controller_id = 1;
> break;
> --
> 2.37.1
>

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