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drm/virtio: Use dma_buf from GEM object instance

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Avoid dereferencing struct drm_gem_object.import_attach for the
imported dma-buf. The dma_buf field in the GEM object instance refers
to the same buffer. Prepares to make import_attach optional.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://lore.kernel.org/r/20250414131507.566072-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2025-04-14 15:12:01 +02:00 • committed by Dmitry Osipenko
parent 964f2a5c0e
commit 415cb45895
1 changed files with 2 additions and 3 deletions
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5
drivers/gpu/drm/virtio/virtgpu_prime.c
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@ -204,16 +204,15 @@ static void virtgpu_dma_buf_free_obj(struct drm_gem_object *obj)
{
struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
struct virtio_gpu_device *vgdev = obj->dev->dev_private;
struct dma_buf_attachment *attach = obj->import_attach;
if (drm_gem_is_imported(obj)) {
struct dma_buf *dmabuf = attach->dmabuf;
struct dma_buf *dmabuf = obj->dma_buf;
dma_resv_lock(dmabuf->resv, NULL);
virtgpu_dma_buf_unmap(bo);
dma_resv_unlock(dmabuf->resv);
dma_buf_detach(dmabuf, attach);
dma_buf_detach(dmabuf, obj->import_attach);
dma_buf_put(dmabuf);
}