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authorJean-Philippe Brucker <jean-philippe@linaro.org>2021-09-13 20:23:59 +0300
committerBjorn Helgaas <bhelgaas@google.com>2021-09-16 00:26:59 +0300
commit6bd65974dedd1e8638e6665e92ccbf26e8a67cbf (patch)
tree9e1520a9ff5e5802b77cd4da0e9ef0b9ddcafac1 /drivers/pci
parent00e1a5d21b4ff514593554167b28a8caeda1497f (diff)
downloadlinux-6bd65974dedd1e8638e6665e92ccbf26e8a67cbf.tar.xz
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 <jean-philippe@linaro.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/pci-acpi.c2
1 files changed, 1 insertions, 1 deletions
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));
}