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SubjectRe: forcedeth problems on 2.6.20-rc6-mm3
On Mon, 5 Feb 2007 16:52:24 -0800 Andrew Morton <akpm@linux-foundation.org> wrote:

> On Mon, 05 Feb 2007 18:35:06 -0600
> Robert Hancock <hancockr@shaw.ca> wrote:
>
> > Daniel Barkalow wrote:
> > > On Sun, 4 Feb 2007, Robert Hancock wrote:
> > >
> > >> Something's busted with forcedeth in 2.6.20-rc6-mm3 for me relative to
> > >> 2.6.20-rc6. There's no errors in dmesg, but it seems no packets ever get
> > >> received and so the machine can't get an IP address. I tried reverting all the
> > >> -mm changes to drivers/net/forcedeth.c, which didn't help. The network
> > >> controller shares an IRQ with the USB OHCI controller which is receiving
> > >> interrupts, so it doesn't seem like an interrupt routing problem, though I
> > >> suppose something wierd could be happening there.
> > >
> > > IIRC, forcedeth tries to use MSI by default. Perhaps the hardware is using
> > > it, but the kernel thinks enabling it didn't work? I think there's a
> > > module option for forcedeth to disable MSI, which might be worth a try to
> > > see if it has any effect.
> >
> > I must have messed something up when testing before - reverting to
> > forcedeth.c from 2.6.20-rc6 does indeed fix the problem. And it doesn't
> > seem like no packets at all are received with the -mm3 version (driver
> > version 0.60), either - if I do a tcpdump I can get Ethernet packets
> > showing up, but I can't ping my router so it seems like something isn't
> > getting through properly. With the 2.6.20-rc6 version (driver version
> > 0.59) it works fine. I switched back and forth between versions and this
> > seems repeatable.
> >
> > I don't think it's MSI related, the CK804 version of these controllers
> > doesn't support MSI and the driver shouldn't be trying to use it. I
> > tried the MSI and MSI-X disable options on the 0.60 driver, but that
> > didn't help.
> >
>
> OK, thanks. Jeff, please note that the forcedeth changes in git-netdev-all
> have a problem.

Well all the forcedeth patches seems to have wandered into mainline anyway.

Please test current git (or tomorrow's git snapshot), see if it works?
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