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Thu, 01 Feb 2024 07:55:48 -0800 (PST) From: Bartosz Golaszewski To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Marcel Holtmann , Luiz Augusto von Dentz , Bjorn Helgaas , Neil Armstrong , Alex Elder , Srini Kandagatla , Greg Kroah-Hartman , Arnd Bergmann , Abel Vesa , Manivannan Sadhasivam , Lukas Wunner Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-pci@vger.kernel.org, Bartosz Golaszewski Subject: [RFC 7/9] PCI: hold the rescan mutex when scanning for the first time Date: Thu, 1 Feb 2024 16:55:30 +0100 Message-Id: <20240201155532.49707-8-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240201155532.49707-1-brgl@bgdev.pl> References: <20240201155532.49707-1-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;