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drm/amdgpu: Fail fb creation from imported dma-bufs. (v2)
Any use of the framebuffer will migrate it to VRAM, which is not sensible for an imported dma-buf. v2: Use DRM_DEBUG_KMS to prevent userspace accidentally spamming dmesg. Reviewed-by: Michel Dänzer <michel.daenzer@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com> CC: amd-gfx@lists.freedesktop.org Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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@ -614,6 +614,12 @@ amdgpu_user_framebuffer_create(struct drm_device *dev,
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return ERR_PTR(-ENOENT);
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}
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/* Handle is imported dma-buf, so cannot be migrated to VRAM for scanout */
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if (obj->import_attach) {
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DRM_DEBUG_KMS("Cannot create framebuffer from imported dma_buf\n");
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return ERR_PTR(-EINVAL);
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}
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amdgpu_fb = kzalloc(sizeof(*amdgpu_fb), GFP_KERNEL);
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if (amdgpu_fb == NULL) {
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drm_gem_object_unreference_unlocked(obj);
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