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| author | Nicolai Hähnle <nicolai.haehnle@amd.com> | 2016-02-05 10:59:43 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-03 15:07:19 -0800 |
| commit | 7a42e7cd29f4c9d59fab1a8e306e21d77f57a0a5 (patch) | |
| tree | cc2ffab2845c4e5aeab8b05c64bed675997be5d8 /drivers/gpu/drm/amd/amdgpu/amdgpu.h | |
| parent | 978b8b828d357197f4f209c9b3a0337a1a7aa7fd (diff) | |
drm/amdgpu: hold reference to fences in amdgpu_sa_bo_new (v2)
commit a8d81b36267366603771431747438d18f32ae2d5 upstream.
An arbitrary amount of time can pass between spin_unlock and
fence_wait_any_timeout, so we need to ensure that nobody frees the
fences from under us.
A stress test (rapidly starting and killing hundreds of glxgears
instances) ran into a deadlock in fence_wait_any_timeout after
about an hour, and this race condition appears to be a plausible
cause.
v2: agd: rebase on upstream
Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu.h')
0 files changed, 0 insertions, 0 deletions