Re: [PATCH] [broken?] Add MSI support to e1000

[Andi Kleen]

Roland Dreier <roland@xxxxxxxxxxx> writes:

>     Tom> I do not see anything wrong with the patch and the kernel MSI
>     Tom> support because it works for a short time. Ganesh may provide
>     Tom> an answer on the MSI support in e1000 hardware.
>
> Based on the e1000 documentation I have, the only thing required for
> the e1000 to use MSI is to set the MSI enable bit in the PCI header.
> Of course there may be some e1000 erratum involving MSI but I have not
> been able to find any indication that this is the case.

There seems to be something wrong with the MSI code in the kernel.
I tried to add MSI support to the s2io driver on x86-64, but it just didn't
work (/proc/interrupts still displayed IO-APIC mode). I haven't 
investigated in detail yet though.

-Andi


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