Re: Opterons and setting the pci bus master bit

Mark Hounschell
2005-09-30T18:29:08Z

Alan Cox wrote:
> On Gwe, 2005-09-30 at 13:10 -0400, Mark Hounschell wrote:
>>everything is fine. When we connect the same chassis to an Intel P4 box
>>everything is fine. It looks like it is the kernel that sets this bit
>>because we have never set it in any of our drivers, yet on the intel
>>boxes it gets set. Why would this bit not be set when the chassis is
>>connected to an Opteron. We are running 32-bit mode BTW. I am using a
>>2.6.11.9 kernel. Is this a motherboard problem or could this be a kernel
>>problem?
>
> If your device needs to bus master you need to call
> pci_set_master(pci_dev). The bus mastering setup prior to that really
> depends on the BIOS and phase of the moon.
>
> See Documentation/pci.txt
>
> Alan
>
>

Ok, thats what I'll do then.

Thanks for the info.
Mark