Re: [PATCH] MSI: check for BIOS assigned addresses

Daniel Yeisley
2009-03-06T16:31:26Z

ACPI hotplug doesn't work.

Dan

On Fri, 2009-03-06 at 17:24 +0100, Ingo Molnar wrote:
> * Daniel Yeisley <dan.yeisley@unisys.com> wrote:
>
> > When creating MSI addresses the kernel makes them up and
> > writes them to the hardware without first checking for what
> > the system BIOS may have assigned. The patch below checks for
> > already assigned values, and leaves them alone if they exist.
> >
> > Signed-off-by: Dan Yeisley <dan.yeisley@unisys.com>
>
> What happens without this fix - do you get non-working cards?
> Boot hang? Or a suboptimal layout?
>
> Ingo