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drm/amdgpu: clear SA bo when created 

This help fix reloading driver hang issue of SDMA
ring

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
hifive-unleashed-5.1
Monk Liu 2016-05-25 16:55:07 +08:00 committed by Alex Deucher
parent 768c95e70c
commit 9a005bef5b
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
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@ -115,6 +115,7 @@ int amdgpu_sa_bo_manager_start(struct amdgpu_device *adev,
return r;
}
r = amdgpu_bo_kmap(sa_manager->bo, &sa_manager->cpu_ptr);
memset(sa_manager->cpu_ptr, 0, sa_manager->size);
amdgpu_bo_unreserve(sa_manager->bo);
return r;
}