PCI_LTR_MAX_SNOOP_LAT
pci_write_config_dword(adev->pdev, ltr + PCI_LTR_MAX_SNOOP_LAT, 0x10011001);
pci_read_config_dword(pdev, pos + PCI_LTR_MAX_SNOOP_LAT, <r_reg);
pci_write_config_dword(pdev, pos + PCI_LTR_MAX_SNOOP_LAT, ltr_reg);
pci_read_config_dword(dev, ltr + PCI_LTR_MAX_SNOOP_LAT, cap);
pci_write_config_dword(dev, ltr + PCI_LTR_MAX_SNOOP_LAT, *cap);