Disabling certain PCI devices

[Rick Stevens]

Mark Knecht wrote:
> Hi,
>    I'm wondering if anyone (Rick, Bob, anyone...) knows how to tell 
> Linux to disable a certain PCI device prior to the time drivers get 
> loaded? For instance,
> 
> 00:0a.2 FireWire (IEEE 1394): Creative Labs SB Audigy FireWire Port
> 00:0b.0 FireWire (IEEE 1394): Texas Instruments TSB12LV23 IEEE-1394 
> Controller
> 
> PCI device 00:0a:2 should be disabled, but 00:0b:0 should be allowed to 
> work.
> 
>    I have this problematic 1394 adapter that is part of the sound card. 
> It doesn't work correctly under Linux. I have the other 1394 adapter 
> that does. They both use the same driver. (1394OHCI) The bad adapter 
> throws lots of messages into /var/log and uses about 5% of my CPU all 
> the time. Bummer.
> 
>    I want to leave the sound card in in the system as the sound part 
> works fine under Alsa.
> 
>    How can I do what Windows Device Manager does where I can tell it not 
> to load a driver for a specific card. In Windows I can have 3 OHCI 
> adapters in the box, but I can create a Hardware Profile that enables 
> different adapters, or I can load different drivers for different cards.
> 
>    I cannot figure out how to do this under Linux, and the 1394 
> developers are telling me they think it cannot be done.
> 
>    Just wondering if anyone here has a solution to this sort of problem.

Try editing /lib/modules/`uname -r`/modules.pcimap and deleting the
line that correponds to the device you want to disable.  It shouldn't
load a driver then.
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- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-           If it's stupid and it works...it ain't stupid!           -
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