From 6bd65974dedd1e8638e6665e92ccbf26e8a67cbf Mon Sep 17 00:00:00 2001 From: Jean-Philippe Brucker Date: Mon, 13 Sep 2021 18:23:59 +0100 Subject: PCI/ACPI: Don't reset a fwnode set by OF Commit 375553a93201 ("PCI: Setup ACPI fwnode early and at the same time with OF") added a call to pci_set_acpi_fwnode() in pci_setup_device(), which unconditionally clears any fwnode previously set by pci_set_of_node(). pci_set_acpi_fwnode() looks for ACPI_COMPANION(), which only returns the existing fwnode if it was set by ACPI_COMPANION_SET(). If it was set by OF instead, ACPI_COMPANION() returns NULL and pci_set_acpi_fwnode() accidentally clears the fwnode. To fix this, look for any fwnode instead of just ACPI companions. Fixes a virtio-iommu boot regression in v5.15-rc1. Fixes: 375553a93201 ("PCI: Setup ACPI fwnode early and at the same time with OF") Link: https://lore.kernel.org/r/20210913172358.1775381-1-jean-philippe@linaro.org Signed-off-by: Jean-Philippe Brucker Signed-off-by: Bjorn Helgaas Acked-by: Rob Herring Acked-by: Rafael J. Wysocki --- drivers/pci/pci-acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index a1b1e2a01632..0f40943a9a18 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -937,7 +937,7 @@ static struct acpi_device *acpi_pci_find_companion(struct device *dev); void pci_set_acpi_fwnode(struct pci_dev *dev) { - if (!ACPI_COMPANION(&dev->dev) && !pci_dev_is_added(dev)) + if (!dev_fwnode(&dev->dev) && !pci_dev_is_added(dev)) ACPI_COMPANION_SET(&dev->dev, acpi_pci_find_companion(&dev->dev)); } -- cgit v1.2.3