| Message ID | 20210914095120.2132059-1-jean-philippe@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | [v2] PCI/ACPI: Don't reset a fwnode set by OF | expand |
On Tue, Sep 14, 2021 at 4:55 AM Jean-Philippe Brucker <jean-philippe@linaro.org> wrote: > > 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: 375553a93201 ("PCI: Setup ACPI fwnode early and at the same time with OF") > Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> > --- > v2: Use dev_fwnode() > v1: https://lore.kernel.org/linux-pci/20210913172358.1775381-1-jean-philippe@linaro.org/ > This fixes boot of virtio-iommu under OF on v5.15-rc1 > --- > drivers/pci/pci-acpi.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Acked-by: Rob Herring <robh@kernel.org>
On Tue, Sep 14, 2021 at 11:55 AM Jean-Philippe Brucker <jean-philippe@linaro.org> wrote: > > 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: 375553a93201 ("PCI: Setup ACPI fwnode early and at the same time with OF") > Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > --- > v2: Use dev_fwnode() > v1: https://lore.kernel.org/linux-pci/20210913172358.1775381-1-jean-philippe@linaro.org/ > This fixes boot of virtio-iommu under OF on v5.15-rc1 > --- > drivers/pci/pci-acpi.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > 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)); > } > -- > 2.33.0 >
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)); }
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: 375553a93201 ("PCI: Setup ACPI fwnode early and at the same time with OF") Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> --- v2: Use dev_fwnode() v1: https://lore.kernel.org/linux-pci/20210913172358.1775381-1-jean-philippe@linaro.org/ This fixes boot of virtio-iommu under OF on v5.15-rc1 --- drivers/pci/pci-acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)