From: Ira Weiny <ira.weiny@intel.com>
To: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Patrik Jakobsson <patrik.r.jakobsson@gmail.com>,
Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
linux-arm-msm@vger.kernel.org, intel-gfx@lists.freedesktop.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
amd-gfx@lists.freedesktop.org
Subject: Re: [PATCH 6/7] drm/amdgpu: Ensure kunmap is called on error
Date: Mon, 13 Dec 2021 19:37:25 -0800 [thread overview]
Message-ID: <20211214033725.GR3538886@iweiny-DESK2.sc.intel.com> (raw)
In-Reply-To: <5bbd3c48-1388-9469-8b6f-deed64406d7d@amd.com>
On Mon, Dec 13, 2021 at 09:37:32PM +0100, Christian König wrote:
> Am 11.12.21 um 00:24 schrieb ira.weiny@intel.com:
> > From: Ira Weiny <ira.weiny@intel.com>
> >
> > The default case leaves the buffer object mapped in error.
> >
> > Add amdgpu_bo_kunmap() to that case to ensure the mapping is cleaned up.
>
> Mhm, good catch. But why do you want to do this in the first place?
I'm not sure I understand the question.
Any mapping of memory should be paired with an unmapping when no longer needed.
And this is supported by the call to amdgpu_bo_kunmap() in the other
non-default cases.
Do you believe the mapping is not needed?
Ira
>
> Christian.
>
> >
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> >
> > ---
> > NOTE: It seems like this function could use a fair bit of refactoring
> > but this is the easiest way to fix the actual bug.
> > ---
> > drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 1 +
> > 1 file changed, 1 insertion(+)
> > nice
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> > index 6f8de11a17f1..b3ffd0f6b35f 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> > @@ -889,6 +889,7 @@ static int amdgpu_uvd_cs_msg(struct amdgpu_uvd_cs_ctx *ctx,
> > return 0;
> > default:
> > + amdgpu_bo_kunmap(bo);
> > DRM_ERROR("Illegal UVD message type (%d)!\n", msg_type);
> > }
>
next prev parent reply other threads:[~2021-12-14 3:37 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-10 23:23 [PATCH 0/7] DRM kmap() fixes and kmap_local_page() conversions ira.weiny
2021-12-10 23:23 ` [PATCH 1/7] drm/i915: Replace kmap() with kmap_local_page() ira.weiny
2021-12-13 9:04 ` Christoph Hellwig
2021-12-13 16:02 ` Ira Weiny
2021-12-13 12:39 ` Ville Syrjälä
2021-12-13 15:45 ` Ira Weiny
2021-12-22 6:08 ` [PATCH V2] " ira.weiny
2021-12-10 23:23 ` [PATCH 2/7] drm/amd: " ira.weiny
2021-12-10 23:24 ` [PATCH 3/7] drm/gma: Remove calls to kmap() ira.weiny
2021-12-10 23:24 ` [PATCH 4/7] drm/radeon: Replace kmap() with kmap_local_page() ira.weiny
2021-12-10 23:24 ` [PATCH 5/7] drm/msm: Alter comment to use kmap_local_page() ira.weiny
2021-12-10 23:24 ` [PATCH 6/7] drm/amdgpu: Ensure kunmap is called on error ira.weiny
2021-12-13 20:37 ` Christian König
2021-12-14 3:37 ` Ira Weiny [this message]
2021-12-14 7:09 ` Christian König
2021-12-15 21:09 ` Ira Weiny
2021-12-16 8:32 ` Christian König
2021-12-10 23:24 ` [PATCH 7/7] drm/radeon: " ira.weiny
2022-01-19 16:53 ` [PATCH 0/7] DRM kmap() fixes and kmap_local_page() conversions Ira Weiny
2022-01-19 17:24 ` Daniel Vetter
2022-01-19 23:55 ` Ira Weiny
2022-01-20 8:16 ` Christian König
2022-01-20 15:48 ` [Intel-gfx] " Daniel Vetter
2022-01-20 16:57 ` Ira Weiny
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