From: Daniel Vetter <daniel@ffwll.ch>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
intel-gfx@lists.freedesktop.org, stable@vger.kernel.org
Subject: Re: [PATCH] agp/intel: Fix typo in needs_ilk_vtd_wa()
Date: Mon, 29 Jun 2015 09:59:08 +0200 [thread overview]
Message-ID: <20150629075907.GT30960@phenom.ffwll.local> (raw)
In-Reply-To: <1435497496-5488-1-git-send-email-chris@chris-wilson.co.uk>
On Sun, Jun 28, 2015 at 02:18:16PM +0100, Chris Wilson wrote:
> In needs_ilk_vtd_wa(), we pass in the GPU device but compared it against
> the ids for the mobile GPU and the mobile host bridge. That latter is
> impossible and so likely was just a typo for the desktop GPU device id
> (which is also buggy).
>
> Fixes commit da88a5f7f7d434e2cde1b3e19d952e6d84533662
> Author: Chris Wilson <chris@chris-wilson.co.uk>
> Date: Wed Feb 13 09:31:53 2013 +0000
>
> drm/i915: Disable WC PTE updates to w/a buggy IOMMU on ILK
>
> Reported-by: Ting-Wei Lan <lantw44@gmail.com>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91127
> References: https://bugzilla.freedesktop.org/show_bug.cgi?id=60391
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: stable@vger.kernel.org
Oops, can't count how often we've committed this mistake.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
> drivers/char/agp/intel-gtt.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
> index 3bb678ef033a..7c6857620175 100644
> --- a/drivers/char/agp/intel-gtt.c
> +++ b/drivers/char/agp/intel-gtt.c
> @@ -581,7 +581,7 @@ static inline int needs_ilk_vtd_wa(void)
> /* Query intel_iommu to see if we need the workaround. Presumably that
> * was loaded first.
> */
> - if ((gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_HB ||
> + if ((gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_D_IG ||
> gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG) &&
> intel_iommu_gfx_mapped)
> return 1;
> --
> 2.1.4
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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next prev parent reply other threads:[~2015-06-29 7:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-28 13:18 [PATCH] agp/intel: Fix typo in needs_ilk_vtd_wa() Chris Wilson
2015-06-29 7:59 ` Daniel Vetter [this message]
2015-06-29 11:27 ` Jani Nikula
2015-06-29 17:55 ` shuang.he
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