From patchwork Fri Feb 17 09:39:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 13144466 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32F61C636D6 for ; Fri, 17 Feb 2023 09:40:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229897AbjBQJkN (ORCPT ); Fri, 17 Feb 2023 04:40:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229839AbjBQJkK (ORCPT ); Fri, 17 Feb 2023 04:40:10 -0500 Received: from post.baikalelectronics.com (post.baikalelectronics.com [213.79.110.86]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6DDE95ECBB; Fri, 17 Feb 2023 01:40:05 -0800 (PST) Received: from post.baikalelectronics.com (localhost.localdomain [127.0.0.1]) by post.baikalelectronics.com (Proxmox) with ESMTP id 91613E0EB0; Fri, 17 Feb 2023 12:40:04 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= baikalelectronics.ru; h=cc:cc:content-transfer-encoding :content-type:content-type:date:from:from:in-reply-to:message-id :mime-version:references:reply-to:subject:subject:to:to; s=post; bh=89Ho1QIRcZKfX5soZrCE2EzO1YSV3CvfzfRXmtNkSVI=; b=DmZKi+izA4wM ZlfiOENvY/BchS7+ZKZ1J/EcKu+MnRlCC/0WK1dVp0CXSQYgDMZk7+EXjsrGQE64 xeJEWpR/hSHbn+wyTyWgOcDMg9NGAr6mU2VNxAxJC0R4dVTuEK0A7ZqH8VItZlBF kA4sqb7SHiC4bcqtBnJSHGI3ClNOAos= Received: from mail.baikal.int (mail.baikal.int [192.168.51.25]) by post.baikalelectronics.com (Proxmox) with ESMTP id 7AEFFE0E6A; Fri, 17 Feb 2023 12:40:04 +0300 (MSK) Received: from localhost (10.8.30.14) by mail (192.168.51.25) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 17 Feb 2023 12:40:04 +0300 From: Serge Semin To: Bjorn Helgaas , Lorenzo Pieralisi , Cai Huoqing , Jingoo Han , Gustavo Pimentel , Vinod Koul , Manivannan Sadhasivam , Yoshihiro Shimoda , Rob Herring , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= CC: Serge Semin , Serge Semin , Alexey Malahov , Pavel Parkhomenko , , , Subject: [PATCH 04/11] PCI: bt1: Enable async probe type Date: Fri, 17 Feb 2023 12:39:49 +0300 Message-ID: <20230217093956.27126-5-Sergey.Semin@baikalelectronics.ru> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230217093956.27126-1-Sergey.Semin@baikalelectronics.ru> References: <20230217093956.27126-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-Originating-IP: [10.8.30.14] X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org 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 Signed-off-by: Serge Semin --- 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 3346770e6654..036a22886d17 100644 --- a/drivers/pci/controller/dwc/pcie-bt1.c +++ b/drivers/pci/controller/dwc/pcie-bt1.c @@ -634,6 +634,7 @@ 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);