+to: Lorenzo On 2017/8/31 22:21, Zhou Wang wrote: > Hi Will and Alex, > > pci_request_acs is called in drivers/iommu/arm-smmu-v3.c to set pci_acs_enable. > > PCI subsystem tries to enable ACS as below: > > pci_device_add > --> pci_init_capabilities > --> pci_enable_acs > > in ACPI PCI driver. However, ACPI PCI driver will be called before SMMU v3 driver, > which will lead pci_enable_acs to return directly as pci_acs_enable is not set > before SMMU v3 driver loading. > > I think this is a bug, what do you think about this problem? > > Best, > Zhou > > > > > > . >
