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

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Message-ID: <s5hsgpkmtsj.wl-tiwai@suse.de>
Date:   Thu, 29 Aug 2019 07:20:44 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     David Miller <davem@...emloft.net>
Cc:     mlindner@...vell.com, stephen@...workplumber.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org, swm@...1.com
Subject: Re: [PATCH] sky2: Disable MSI on yet another ASUS boards (P6Xxxx)

On Thu, 29 Aug 2019 01:09:37 +0200,
David Miller wrote:
> 
> From: Takashi Iwai <tiwai@...e.de>
> 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@...1.com>
> > Signed-off-by: Takashi Iwai <tiwai@...e.de>
> 
> 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.


Thanks!

Takashi