From patchwork Wed Apr 10 12:46:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 13624251 X-Patchwork-Delegate: johannes@sipsolutions.net Received: from mail-lj1-f181.google.com (mail-lj1-f181.google.com [209.85.208.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1769E16D9B2 for ; Wed, 10 Apr 2024 12:47:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712753229; cv=none; b=P0u/aLahAUvZMIuQTWC7tAKFqaRXNXobWU3MmzMF9zCjfrmHQSfhBXRrvyMoXco2PRm+gBHcev4vlaXNe+klIKftVosVrcZl3XYOUXs2wH2lTnlbOZdyetwFn+J1fySL0PjdzBoyTU/9Q72UWhZgAoIk9XOay5soZa5UuAzM23o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712753229; c=relaxed/simple; bh=c5P5lscsnbWC5EHjzQG5JSjk93ahAtvYSeOqjGvj/7s=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=F+1bJLI/cvPb+SrNJVixyTwlgpw7qmBVcXrJEykpE7jInHgRfxwho8jgJXwjFyjEEy9I9enpv8KJRu/enYzCj9dF/MpSLIkWxJoLu2qfoRDb786Boo8VY0gG+B+GUalQo/wJNezKwz0qVvwLyMnYR5RVFLdUK+WAIx2AosLgxP0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=bgdev.pl; spf=none smtp.mailfrom=bgdev.pl; dkim=pass (2048-bit key) header.d=bgdev-pl.20230601.gappssmtp.com header.i=@bgdev-pl.20230601.gappssmtp.com header.b=Xq/CEiR6; arc=none smtp.client-ip=209.85.208.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=bgdev.pl Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bgdev.pl Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bgdev-pl.20230601.gappssmtp.com header.i=@bgdev-pl.20230601.gappssmtp.com header.b="Xq/CEiR6" Received: by mail-lj1-f181.google.com with SMTP id 38308e7fff4ca-2d29aad15a5so62987861fa.3 for ; Wed, 10 Apr 2024 05:47:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1712753224; x=1713358024; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Y3Qk/DJ4ryR6XkF1VG+aVefQinCL6xUnkD758p4/AkE=; b=Xq/CEiR68bpZ9rkUUSkFsdEk3+B3xBEIzbiZacgnZnqD/1VttUWDPLWvrSdtxEGTov jQA1fGFx1yRoNKcc3oJjEaa4/VpOgPzLAO1ueWmjB9+fzm7Nw+RN8DHbrOZ9hesWhu91 +xg2g5cnPvEkUsE9pSGPzBCwNTRacAUcvuBCBPbR4Rk3Pn3u43jbp1prJg8IshPwfnuf UpsLJZQRoa7sWPFHLBiLN/VXSVe+xK9Wf+KCUyzYr+yLU3L/b80XtJSScG/fUCVKogir VZWEDRtWc9O/ZC81doHtvFqERt0Vx14zmjx578DkXXmhcD76Al0WhiHl9SAxa1RIc4LP mppw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712753224; x=1713358024; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Y3Qk/DJ4ryR6XkF1VG+aVefQinCL6xUnkD758p4/AkE=; b=NF7sJ4Dqt9XnFvKp4wOOD+XucoRGsnGHv0fP6hxzwlopWXgvEVgfnLSIlfJen8ANfX IbdZr9SrwpjtrEYw/aAtEejcpX5fYd21WmTfSZCLck62/rHDKdH9S45WUEsLhLO3xnOU 4ju4MJCiGJz99NAzSRIxDXBIjpm+fIdKGhTxL6QduAft/pHVI0g6UXMyyb4znqWEKOO/ oGitGOqClseQS1yXcE/Rk2IPF2Ckq6/HLnDjRPQ7DSnY21PoVKuNQ1SWiofpKp4N8D3F vbdtQ0ByRtz9JshQ2I/wRBcZ34Eex7WpSOToHIWC4zhoVRQEbVt0BxLdYMUIiwkviBFv 1kqA== X-Forwarded-Encrypted: i=1; AJvYcCUEsXxolmcPek4L3W0xQWg8YzfFZrrMjdQTRppR1TU+/3lkeYankjMoKMlxO1/KkSRbnPt06gMUD7ng3iAr4fX/45fyk6wcoKQKK35g2xE= X-Gm-Message-State: AOJu0YwrMeZ45CPXoJ7V0gV08GUbyaX43VS/38by5zc8qTWmgCvqJ2Ei fGR4S5L7XHikLmeUH2v0rtMMPSDpZ5oeVdpZAZtvjXmbiXkfVkj53787IlNAYFU= X-Google-Smtp-Source: AGHT+IHz4nxeX4Kf6VHEirR5NLp0YeiXxNxBQwG9L0Vdn0xDzZmeanJ4D1dLir6knQRmR1TckfDACg== X-Received: by 2002:a2e:9dd7:0:b0:2d4:a22e:d3b3 with SMTP id x23-20020a2e9dd7000000b002d4a22ed3b3mr1712240ljj.11.1712753223862; Wed, 10 Apr 2024 05:47:03 -0700 (PDT) Received: from brgl-uxlite.home ([2a01:cb1d:75a:e000:6908:7e99:35c9:d585]) by smtp.gmail.com with ESMTPSA id v13-20020a05600c444d00b0041663450a4asm2150929wmn.45.2024.04.10.05.47.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Apr 2024 05:47:03 -0700 (PDT) From: Bartosz Golaszewski To: Marcel Holtmann , Luiz Augusto von Dentz , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kalle Valo , Bjorn Andersson , Konrad Dybcio , Liam Girdwood , Mark Brown , Catalin Marinas , Will Deacon , Bjorn Helgaas , Bartosz Golaszewski , Saravana Kannan , Geert Uytterhoeven , Arnd Bergmann , Neil Armstrong , Marek Szyprowski , Alex Elder , Srini Kandagatla , Greg Kroah-Hartman , Abel Vesa , Manivannan Sadhasivam , Lukas Wunner , Dmitry Baryshkov , Amit Pundir , Xilin Wu Cc: linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-pm@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v7 09/16] PCI: hold the rescan mutex when scanning for the first time Date: Wed, 10 Apr 2024 14:46:21 +0200 Message-Id: <20240410124628.171783-10-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240410124628.171783-1-brgl@bgdev.pl> References: <20240410124628.171783-1-brgl@bgdev.pl> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Bartosz Golaszewski With the introduction of PCI device power control drivers that will be able to trigger the port rescan when probing, we need to hold the rescan mutex during the initial pci_host_probe() too or the two could get in each other's way. Signed-off-by: Bartosz Golaszewski --- drivers/pci/probe.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 1325fbae2f28..1802900328a0 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -3066,7 +3066,9 @@ int pci_host_probe(struct pci_host_bridge *bridge) struct pci_bus *bus, *child; int ret; + pci_lock_rescan_remove(); ret = pci_scan_root_bus_bridge(bridge); + pci_unlock_rescan_remove(); if (ret < 0) { dev_err(bridge->dev.parent, "Scanning root bridge failed"); return ret;