Re: [PATCH] sky2: Disable MSI on yet another ASUS boards (P6Xxxx)

From: Takashi Iwai
Date: Thu Aug 29 2019 - 01:20:48 EST

On Thu, 29 Aug 2019 01:09:37 +0200,
David Miller wrote:
> From: Takashi Iwai <tiwai@xxxxxxx>
> Date: Wed, 28 Aug 2019 08:31:19 +0200
> > A similar workaround for the suspend/resume problem is needed for yet
> > another ASUS machines, P6X models. Like the previous fix, the BIOS
> > doesn't provide the standard DMI_SYS_* entry, so again DMI_BOARD_*
> > entries are used instead.
> >
> > Reported-and-tested-by: SteveM <swm@xxxxxxxx>
> > Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
> Applied, but this is getting suspicious.
> It looks like MSI generally is not restored properly on resume on these
> boards, so maybe there simply needs to be a generic PCI quirk for that?

Yes, I wondered that, too.
But, e.g. HD-audio should use MSI on Intel platforms, and if the
problem were generic, it must suffer from the same issue, and I
haven't heard of such, so far. So it's likely specific to some
limited devices, as it seems.