From patchwork Thu Jan 4 13:01:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 759902 Received: from mail-wr1-f47.google.com (mail-wr1-f47.google.com [209.85.221.47]) (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 36ADC23747 for ; Thu, 4 Jan 2024 13:02:10 +0000 (UTC) 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="qDAKAE9T" Received: by mail-wr1-f47.google.com with SMTP id ffacd0b85a97d-33678156e27so366941f8f.1 for ; Thu, 04 Jan 2024 05:02:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1704373328; x=1704978128; 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=ko9AldsNAGIySQ6r8IsXSCtLQ9r/1ys0AWCrWCqKA/w=; b=qDAKAE9TbUQIkcoKTZtSY0WnsUGIVQYmcduoDIK0xckAbAwmxwmFXB4AWvibjMdYYo aHW7vr9A+l3jDthupCARLI5lxAm3VBqCodkR7/R4H4D0/iCjyAgskyFjHHXw5R1/wnRb L6xinfTzmbRP5M8plryQr/jzRPFgvnrY2jN5ymG+7Mx9CX1P3DSNnkUfXmswZOKE2S9h 8hiiEjZCIFevEUYRcAddjo5IoeH53GKB+12G6Mta0Zhq9roMq7itKAXT9BzZXnmn7IsP 6OkbDcLCHnsulClebByr5ufXmmymyNSC+LY46xZFukP9mrdmqSSepY+Sd4DKvqqBfj7D gDLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704373328; x=1704978128; 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=ko9AldsNAGIySQ6r8IsXSCtLQ9r/1ys0AWCrWCqKA/w=; b=F3WalaCK0U8dCXh4iyxLccYiIeTrieHk7iMajZ0XjmGs8If47cD3NiHM0h7YbllxKc sXFq8C7+JcFCxj3lQ+ZLUwT4m1UtTsqWijAVm7L90xCe3juaIGJVNqivMr1xINinuKgr 6CC51e6rrfl+RHuAC2GuZWg3QfFcGU+e9l2Gbxkc2B6LkDO86pJ0VKrIp/MnsAA1w4kG nkMDbLXDU963JyfXWjz4KoRI7gMEsZ2lZxacTFmKrWRNypRGY88B1nHEwCjzImz1rJGB k8pcBCmXu40rdOWpN2IVssxbqF7qVUwgPdbnKeh9nvqJRi21MZJdhkd5HxLq5DNLHwQX t0jA== X-Gm-Message-State: AOJu0Ywjt6P26wzKyKIN1relDowj6DaAUftEAuA5PbIaOhIvE73HRx5M jYxyISc++URT6TRbbE/NFXO7ypGP7r1wNA== X-Google-Smtp-Source: AGHT+IFUjxl+akq5qBUWz1Hq2UkXunszpKE6K042Vn3Nvy8yjJ9A6yhdSklCJkd/SLfWbEWSuN0qWg== X-Received: by 2002:adf:f1c7:0:b0:336:7f93:3dcc with SMTP id z7-20020adff1c7000000b003367f933dccmr292279wro.81.1704373328663; Thu, 04 Jan 2024 05:02:08 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:5b69:3768:8459:8fee]) by smtp.gmail.com with ESMTPSA id w5-20020a5d5445000000b0033660f75d08sm32887387wrv.116.2024.01.04.05.02.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Jan 2024 05:02:08 -0800 (PST) From: Bartosz Golaszewski To: Kalle Valo , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Catalin Marinas , Will Deacon , Bjorn Helgaas , Heiko Stuebner , Jernej Skrabec , Chris Morgan , Linus Walleij , Geert Uytterhoeven , Arnd Bergmann , Neil Armstrong , =?utf-8?q?N=C3=ADcolas_F_=2E_R_?= =?utf-8?q?=2E_A_=2E_Prado?= , Marek Szyprowski , Peng Fan , Robert Richter , Dan Williams , Jonathan Cameron , Terry Bowman , Kuppuswamy Sathyanarayanan , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Huacai Chen , Alex Elder , Srini Kandagatla , Greg Kroah-Hartman Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, Bartosz Golaszewski Subject: [RFC 4/9] PCI: hold the rescan mutex when scanning for the first time Date: Thu, 4 Jan 2024 14:01:18 +0100 Message-Id: <20240104130123.37115-5-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240104130123.37115-1-brgl@bgdev.pl> References: <20240104130123.37115-1-brgl@bgdev.pl> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Bartosz Golaszewski With the introduction of the power sequencing drivers that will be able to trigger the port rescan, 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 b7335be56008..957f7afee7ba 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -3122,7 +3122,9 @@ 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;