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From:   Serge Semin <Sergey.Semin@baikalelectronics.ru>
To:     Bjorn Helgaas <bhelgaas@google.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Jingoo Han <jingoohan1@gmail.com>,
        Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
        Rob Herring <robh@kernel.org>,
        Lorenzo Pieralisi <lpieralisi@kernel.org>,
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CC:     Serge Semin <Sergey.Semin@baikalelectronics.ru>,
        Serge Semin <fancer.lancer@gmail.com>,
        Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>,
        <linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH RESEND v6 03/11] PCI: bt1: Enable async probe type
Date:   Wed, 31 May 2023 14:25:54 +0300
Message-ID: <20230531112602.7222-4-Sergey.Semin@baikalelectronics.ru>
In-Reply-To: <20230531112602.7222-1-Sergey.Semin@baikalelectronics.ru>
References: <20230531112602.7222-1-Sergey.Semin@baikalelectronics.ru>
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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>
---
 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