diff options
| author | Jean-Philippe Brucker <jean-philippe@linaro.org> | 2021-09-13 20:23:59 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2021-09-16 00:26:59 +0300 |
| commit | 6bd65974dedd1e8638e6665e92ccbf26e8a67cbf (patch) | |
| tree | 9e1520a9ff5e5802b77cd4da0e9ef0b9ddcafac1 /drivers/pci | |
| parent | 00e1a5d21b4ff514593554167b28a8caeda1497f (diff) | |
| download | linux-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.c | 2 |
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)); } |