Order of DVB devices

[Andreas Besse <besse@motama.com>]

Hello,

i have a system with multiple DVB cards of the same type and want to
specify the order of the devices /dev/dvb/adapterX. The device plugged
into the physical PCI slot 1 on the mainboard should be assigned to
/dev/dvb/adapter0 and the card in PCI slot 2 should be assigned to
/dev/dvb/adapter1.

To identify a DVB card I looked at the output of udevinfo for 2 DVB
devices. The devices don't provide a serial, so the difference is only
in the KERNELS parameter (e.g. KERNELS="0000:02:00.0" vs.
KERNELS="0000:03:00.0"). The Kernels parameter seem to reflect the PCI
Bus ID.

According to the thread http://thread.gmane.org/gmane.linux.kernel.pci/7446/focust47 on the linux-pci mailinglist, the PCI Bus ID is *not* deterministic and totally random determined at boot. 

In the following post http://thread.gmane.org/gmane.linux.kernel.pci/7446/focust67 there is mentioned that the order of the devices can be specified by using udev rules.

But how this can be done? Which information in /sys can be used to determine which DVB device is connected to which specific slot?

regards,
Andreas Besse