pci and pcie coexistence

Hi,

I have some boards, where pcie and pci need to coexist.

This implies, that both drivers share the same pcibios_plat_dev_init and
pcibios_map_irq.

I am trying to figure out, how to best differentiate between the 2
drivers. Would the following be sane ?

if (pci_find_capability(pdev, PCI_CAP_ID_EXP))
     do_pcie_stuf();
else
     do_pci_stuff();


Thanks,
John