From patchwork Fri Oct 28 21:19:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brian Norris X-Patchwork-Id: 13024326 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 AB196ECAAA1 for ; Fri, 28 Oct 2022 21:19:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229572AbiJ1VTT (ORCPT ); Fri, 28 Oct 2022 17:19:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229379AbiJ1VTS (ORCPT ); Fri, 28 Oct 2022 17:19:18 -0400 Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 094CC47B8D for ; Fri, 28 Oct 2022 14:19:18 -0700 (PDT) Received: by mail-pj1-x102d.google.com with SMTP id d59-20020a17090a6f4100b00213202d77e1so11002577pjk.2 for ; Fri, 28 Oct 2022 14:19:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=+ReCGUZkiii68cxY5IFdEUSZ/im3lxKgaunLDv0fff4=; b=dfyzPY26KbrgwSdtg2Eu9muTgcMpRXIMEJnsdw50KY+jAxf3zk92oBn8bsHdNzq1nb iQQJEqJQaOQy8a/V1OTKldPw9obGnX3WoxPGSuiVLCVEQIw2aR5hgjPPFg2//6LRG2eD /pgH8SqGafhbQnprbtIKIj9gW+eAi57yGg3l0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=+ReCGUZkiii68cxY5IFdEUSZ/im3lxKgaunLDv0fff4=; b=JZe3Fn6N2lBITb7GmuyMNk7M0yuQXrGRxWJn7uZzF9Gmpm1bgRHNDhOHOAdb00lRGe M2MnLxq7pqmr1OoCi6TzMdEDLiA2GXXHNXxvvW09WTBpCzktgUzemOt2Snz4XzO/jLMF geMpm63v2cHlTbNdTUNPMukHEaU/e5YMY2oZnnfYh1a1GNIKmFCsdkSRRB4Zc4P4KC8f yr09oZWdwYAjEPNFXjWYUQz0UdiRWRndD/REJNoZxI/hAtPFAVeRm5DRexBEpEw0HUOx QZkOWef4SXXmFuQESMPOtixh4+pRmHrCnGUUQ8Adef5iq2aP4EuPcCoTMDRDw/CTf0i4 /4Dg== X-Gm-Message-State: ACrzQf1CSQ61P1LY9jD+h8eYFwiy2WyHdF/Oi/yZ6R8Xz8hEpKxyT9eF v4YJw+SPuszTj0iZsOza2vsxJg== X-Google-Smtp-Source: AMsMyM4LcUInNIq1ebdOfawk9BECCxtZxKZcoc2dMXxhIaXRx4dVQ59j6k13ylnw5jCih/8kWnXz6A== X-Received: by 2002:a17:902:dacf:b0:185:3735:ffc7 with SMTP id q15-20020a170902dacf00b001853735ffc7mr930436plx.147.1666991957575; Fri, 28 Oct 2022 14:19:17 -0700 (PDT) Received: from localhost ([2620:15c:9d:2:65f9:c180:249c:190f]) by smtp.gmail.com with UTF8SMTPSA id f5-20020a170902860500b00186c37270f6sm3452364plo.24.2022.10.28.14.19.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 28 Oct 2022 14:19:17 -0700 (PDT) From: Brian Norris To: Alan Stern , Greg Kroah-Hartman , Mathias Nyman Cc: Brian Norris , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Subject: [PATCH 1/2] usb: ehci-pci: Set PROBE_PREFER_ASYNCHRONOUS Date: Fri, 28 Oct 2022 14:19:07 -0700 Message-Id: <20221028141821.1.I9a5353f81d1509f85f3a04f0cdc9099f6fe60811@changeid> X-Mailer: git-send-email 2.38.1.273.g43a17bfeac-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This driver often takes on the order of 8ms to start, but every little bit counts. It shouldn't have many cross-device dependencies to race with, nor racy access to shared state with other drivers, so this should be a relatively low risk change. This driver was pinpointed as part of a survey of top slowest initcalls (i.e., are built in, and probing synchronously) on a lab of ChromeOS systems. Signed-off-by: Brian Norris Acked-by: Alan Stern --- drivers/usb/host/ehci-pci.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 17f8b6ea0c35..4b148fe5e43b 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -411,11 +411,12 @@ static struct pci_driver ehci_pci_driver = { .remove = ehci_pci_remove, .shutdown = usb_hcd_pci_shutdown, -#ifdef CONFIG_PM .driver = { - .pm = &usb_hcd_pci_pm_ops - }, +#ifdef CONFIG_PM + .pm = &usb_hcd_pci_pm_ops, #endif + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, }; static int __init ehci_pci_init(void)