Function probe_pci_device 

pub fn probe_pci_device<H: VirtIoHal, C: ConfigurationAccess>(
    root: &mut PciRoot<C>,
    bdf: DeviceFunction,
    dev_info: &DeviceFunctionInfo,
) -> Option<(DeviceType, PciTransport)>

Try to probe a VirtIO PCI device from the given PCI address.

If the device is recognized, returns the device type and a transport object for later operations. Otherwise, returns None.