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    SubjectRe: [Alsa-devel] [RFC: 2.6.19 patch] snd-hda-intel: default MSI to off
    On Wed, 18 Oct 2006 12:24:54 +0200
    Takashi Iwai <tiwai@suse.de> wrote:

    > At Tue, 17 Oct 2006 14:40:53 -0700,
    > Stephen Hemminger wrote:
    > >
    > > On Tue, 17 Oct 2006 23:13:01 +0200
    > > Adrian Bunk <bunk@stusta.de> wrote:
    > >
    > > > On Thu, Oct 05, 2006 at 11:08:57PM +0200, Prakash Punnoor wrote:
    > > > > Am Donnerstag 05 Oktober 2006 19:30 schrieb Fatih A????c??:
    > > > > > 2006/10/5, Prakash Punnoor <prakash@punnoor.de>:
    > > > > > > Hi,
    > > > > > >
    > > > > > > subjects say it all. Without irqpoll my nic doesn't work anymore. I added
    > > > > > > Ingo
    > > > > > > to cc, as my IRQs look different, so it may be a prob of APIC routing or
    > > > > > > the
    > > > > > > like.
    > > > >
    > > > > > > Can you try booting with pci=nomsi ? I have a similar problem with my
    > > > >
    > > > > I used snd-hda-intel.disable_msi=1 and this actually helped! Now the nforce
    > > > > nic works w/o problems. So it was the audio driver causing havoc on the nic.
    > > > >...
    > > >
    > > > Unless someone finds and fixes what causes such problems, I'd therefore
    > > > suggest the patch below to let MSI support to be turned off by default.
    > > >
    > > > cu
    > > > Adrian
    > > >
    > >
    > > It shouldn't be that hard to write a small bit of code to force an interrupt
    > > and catch it, that's what other drivers do to workaround the BIOS braindamage
    > > that seems to be rampant (until M$ Vista comes out and supports MSI).
    >
    > OK, what about a patch like below?
    >
    > It's against the latest ALSA tree, so please pull alsa.git from
    > git://kernel.org/pub/scm/linux/kernel/git/perex/alsa.git
    > before applying it (this tree includes only patches to be pushed to
    > 2.6.19).
    >
    >
    > Takashi
    >

    Don't you need to check return value from pci_enable_msi()?

    --
    Stephen Hemminger <shemminger@osdl.org>
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