Re: [PATCH RESEND v3 03/10] PCI: bt1: Enable async probe type

Manivannan Sadhasivam
2023-04-11T11:06:20Z

On Tue, Apr 11, 2023 at 06:39:21AM +0300, Serge Semin wrote:
> It's safe to enable the asyncronous probe type since the PCIe peripheral
> devices probing order isn't essential for booting the system. Moreover
> enabling that feature saves 0.5 seconds of bootup time if no any device
> attached to the PCIe root port. It's a significant performance gain seeing
> the total bootup time takes about 3 seconds.
>
> Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>

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

- Mani

> ---
> drivers/pci/controller/dwc/pcie-bt1.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/pci/controller/dwc/pcie-bt1.c b/drivers/pci/controller/dwc/pcie-bt1.c
> index 95a723a6fd46..e36a20bf82cf 100644
> --- a/drivers/pci/controller/dwc/pcie-bt1.c
> +++ b/drivers/pci/controller/dwc/pcie-bt1.c
> @@ -638,6 +638,7 @@ static struct platform_driver bt1_pcie_driver = {
> .driver = {
> .name = "bt1-pcie",
> .of_match_table = bt1_pcie_of_match,
> + .probe_type = PROBE_PREFER_ASYNCHRONOUS,
> },
> };
> module_platform_driver(bt1_pcie_driver);
> --
> 2.40.0
>
>

--
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