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drm/virtio: Fix driver removal with disabled KMS

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[ Upstream commit f329e8325e ]

DRM atomic and modesetting aren't initialized if virtio-gpu driver built
with disabled KMS, leading to access of uninitialized data on driver
removal/unbinding and crashing kernel. Fix it by skipping shutting down
atomic core with unavailable KMS.

Fixes: 72122c69d7 ("drm/virtio: Add option to disable KMS support")
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Tested-by: Ryosuke Yasuoka <ryasuoka@redhat.com>
Reviewed-by: Ryosuke Yasuoka <ryasuoka@redhat.com>
Link: https://patch.msgid.link/20260604122743.13383-1-dmitry.osipenko@collabora.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dmitry Osipenko
2026-06-19 13:39:31 +02:00
committed by Greg Kroah-Hartman
parent c5f438dd2f
commit ed3e134700
1 changed files with 4 additions and 1 deletions
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drivers/gpu/drm/virtio/virtgpu_drv.c
+4 -1
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@@ -118,7 +118,10 @@ static void virtio_gpu_remove(struct virtio_device *vdev)
struct drm_device *dev = vdev->priv;
drm_dev_unplug(dev);
drm_atomic_helper_shutdown(dev);
if (drm_core_check_feature(dev, DRIVER_ATOMIC))
drm_atomic_helper_shutdown(dev);
virtio_gpu_deinit(dev);
drm_dev_put(dev);
}