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drm/amdgpu: set f_mapping on exported DMA-bufs

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Otherwise we can't correctly CPU map TTM buffers.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Christian König 2017-11-13 17:20:50 +01:00 committed by Alex Deucher
parent c5066129af
commit 4b277247b1
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
View file

@ -169,10 +169,14 @@ struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev,
int flags)
{
struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj);
struct dma_buf *buf;
if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm) ||
bo->flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID)
return ERR_PTR(-EPERM);
return drm_gem_prime_export(dev, gobj, flags);
buf = drm_gem_prime_export(dev, gobj, flags);
if (!IS_ERR(buf))
buf->file->f_mapping = dev->anon_inode->i_mapping;
return buf;
}