linux-kernel - Re: [git patch] improve INTx toggle for PCI MSI

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Date:	Fri, 8 Dec 2006 12:00:31 +0900
From:	"Takashi Iwai" <takashi.iwai@...il.com>
To:	"Linus Torvalds" <torvalds@...l.org>
Cc:	"Jeff Garzik" <jeff@...zik.org>, "Takashi Iwai" <tiwai@...e.de>,
	"Andrew Morton" <akpm@...l.org>,
	LKML <linux-kernel@...r.kernel.org>, gregkh@...e.de,
	barkalow@...ervon.org
Subject: Re: [git patch] improve INTx toggle for PCI MSI

2006/12/8, Linus Torvalds <torvalds@...l.org>:
>
>
> On Thu, 7 Dec 2006, Jeff Garzik wrote:
> >
> > "it boots" on ICH7 at least.
>
> Ok. Pulled, pushed out.
>
> There was some noise saying that this may actually fix the problems with
> the NVidia "Intel HDA" sound situation? Can people who saw that issue try
> it out whether this just makes MSI works for them?
>
> Takashi added to the To: field, because he hopefully remembers and has a
> clue about the proper identities in question.. Iirc, you needed to have
> not only a NVidia chipset, but also have the legacy interrupt shared with
> some other device to see the problem.

Well, I'm on vacation now, so cannot answer much, too :)

IIRC, the problem was with HD-audio and network devices on Nvidia.
The explicit call of pci_intx() (currently implemented in hd-audio
driver locally) helped avoiding the orphan irq problem, but doesn't
fix the MSI problem itself.  (Some might have been fixed indeed,
but I don't have reports in hands.)


Takashi
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