From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Besse Date: Tue, 26 Jan 2010 14:36:39 +0000 Subject: Order of DVB devices Message-Id: <4B5EFDF7.8090709@motama.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org 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