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Date:   Tue, 11 Apr 2023 16:35:45 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To:     Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc:     Bjorn Helgaas <bhelgaas@google.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Cai Huoqing <cai.huoqing@linux.dev>,
        Jingoo Han <jingoohan1@gmail.com>,
        Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
        Vinod Koul <vkoul@kernel.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
        Rob Herring <robh@kernel.org>,
        Lorenzo Pieralisi <lpieralisi@kernel.org>,
        Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= <kw@linux.com>,
        Serge Semin <fancer.lancer@gmail.com>,
        Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>,
        linux-pci@vger.kernel.org, dmaengine@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH RESEND v3 03/10] PCI: bt1: Enable async probe type
Message-ID: <20230411110545.GE5333@thinkpad>
References: <20230411033928.30397-1-Sergey.Semin@baikalelectronics.ru>
 <20230411033928.30397-4-Sergey.Semin@baikalelectronics.ru>
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In-Reply-To: <20230411033928.30397-4-Sergey.Semin@baikalelectronics.ru>
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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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