PCI_REG_COMMAND
pci_read_config_word(pdev, PCI_REG_COMMAND, &pci_cfg_cmd_word);
pci_write_config_word(pdev, PCI_REG_COMMAND, pci_cfg_cmd_word);
atl2_read_pci_cfg(hw, PCI_REG_COMMAND, &pci_cfg_cmd_word);
atl2_write_pci_cfg(hw, PCI_REG_COMMAND, &pci_cfg_cmd_word);