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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-26 12:55:17 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-26 12:55:17 +0200 |
| commit | 71e69d7adee10a55b817df748dec5bfec7bf4c30 (patch) | |
| tree | ac342851e20df5a5f7891cc603998b654d26724c /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | 03b1292d1c0ea195e025e667555d74db7da82026 (diff) | |
| parent | ff1176468d368232b684f75e82563369208bc371 (diff) | |
Merge 5.14-rc3 into char-misc-next
We need the char-misc fixes from 5.14-rc3 into here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index d0d9bc445d7b..854fc497844b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -255,6 +255,15 @@ static int amdgpu_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_str if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS) return -EPERM; + /* Workaround for Thunk bug creating PROT_NONE,MAP_PRIVATE mappings + * for debugger access to invisible VRAM. Should have used MAP_SHARED + * instead. Clearing VM_MAYWRITE prevents the mapping from ever + * becoming writable and makes is_cow_mapping(vm_flags) false. + */ + if (is_cow_mapping(vma->vm_flags) && + !(vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC))) + vma->vm_flags &= ~VM_MAYWRITE; + return drm_gem_ttm_mmap(obj, vma); } |