pci_acs_enabled
if (!pdev->multifunction || pci_acs_enabled(pdev, REQ_ACS_FLAGS))
pci_acs_enabled(tmp, REQ_ACS_FLAGS))
if (!pci_acs_enabled(pdev, acs_flags))
bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);