linux-kernel - Re: [Regression, post-rc2] Commit a5ee4eb7541 breaks OpenGL on RS780 (was: Re: Linux 2.6.34-rc3)

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Date:	Thu, 1 Apr 2010 10:24:29 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Alex Deucher <alexdeucher@...il.com>
cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux PCI <linux-pci@...r.kernel.org>,
	Greg KH <gregkh@...e.de>, Clemens Ladisch <clemens@...isch.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Alex Deucher <alexdeucher@...il.com>,
	dri-devel@...ts.sourceforge.net, stable@...nel.org
Subject: Re: [Regression, post-rc2] Commit a5ee4eb7541 breaks OpenGL on RS780
  (was: Re: Linux 2.6.34-rc3)



On Thu, 1 Apr 2010, Alex Deucher wrote:
> 
> Clemems' "PCI quirk: RS780/RS880: disable MSI completely" patch is the
> right approach I think.  Note that it's only devices hung off the int
> gfx pci to pci bridge that have broken MSI (gfx and audio).  MSI works
> fine on the PCIE slots.  I have a similar patch for rs400 chips on bug
> 15626:
> https://bugzilla.kernel.org/show_bug.cgi?id=15626

Hmm. Does 'pci_msi_enable' only cover regular PCI devices? Or will that 
pci_no_msi() quirk disable MSI for PCIE too? I think it will trigger for 
PCIE drivers too.

Put another way: it sounds like the quirk now disables MSI for all 
devices. Maybe there would some more targeted mode?

		Linus
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