Re: [PATCH] Revert sky2 to 0.13a

[Jeff Garzik <jgarzik@pobox.com>]

Ian Kumlien wrote:
> On Mon, 2006-02-27 at 09:18 -0800, Stephen Hemminger wrote:
>
> > On Mon, 27 Feb 2006 17:38:38 +0100
> > Wolfgang Hoffmann <woho@woho.de> wrote:
> >
> > > On Monday 27 February 2006 17:00, Stephen Hemminger wrote:
> > > 2.6.16-rc5 with disable_msi=1 works for me, no hangs seen so far. I rsynced 80 
> > > GB of data, thats about 5-10 times more than I typically need to reproduce a 
> > > hang, so it seems to be solid. For the record: 2.6.16-rc5 with disable_msi=0 
> > > does hang.
> > >
> > > I have not seen the memory trashing others reported, with no version I tested 
> > > so far. Maybe my scenario is not likely to trigger this, so I can't tell.
> > >
> > > Unless a fix for msi is at hand, may I suggest for 2.6.16 to revert the msi 
> > > commit or switch the default to disable_msi=1?
> > >
> > > I've updated bugzilla #6084 accordingly.
> >
> > Okay, then what I need is lspci -v of all systems that have the problem, I'll make
> > a blacklist (or update PCI quirks). I suspect that MSI doesn't work for any devices
> > on these systems, or MSI changes the timing enough to expose existing races.
>
>
> Am i just tired from trying to make XSLT to do something unnatural or is
> there something odd going on in msi.c?
>
> static void msi_set_mask_bit(unsigned int vector, int flag)
> {
>         struct msi_desc *entry;
>
>         entry = (struct msi_desc *)msi_desc[vector];
>         if (!entry || !entry->dev || !entry->mask_base)
>                 return;
>         switch (entry->msi_attrib.type) {
>         case PCI_CAP_ID_MSI:
>         {
>                 int             pos;		<==
>                 u32             mask_bits;
>
>                 pos = (long)entry->mask_base;	<==
> ...

Just from the casting it seems a bit bogus, yes...

	Jeff



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