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drm/virtio: Fixes a potential NULL pointer dereference on probe failure

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The dev->dev_private might not be allocated if virtio_gpu_pci_quirk()
or virtio_gpu_init() failed. In this case, we should avoid the cleanup
in virtio_gpu_release().

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20210517084913.403-1-xieyongji@bytedance.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Xie Yongji
2021-05-17 16:49:11 +08:00
committed by Gerd Hoffmann
parent 644adc3d0f
commit 17f46f488a
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/virtio/virtgpu_kms.c
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@@ -264,6 +264,9 @@ void virtio_gpu_release(struct drm_device *dev)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
if (!vgdev)
return;
virtio_gpu_modeset_fini(vgdev);
virtio_gpu_free_vbufs(vgdev);
virtio_gpu_cleanup_cap_cache(vgdev);