[PATCH] drm/virtio: add null check in virtio_gpu_poll

[Gurchetan Singh]

From: Gurchetan Singh <gurchetansi...@chromium.org>

If vfpriv is null, we shouldn't check vfpriv->ring_idx_mask.

Signed-off-by: Gurchetan Singh <gurchetansi...@chromium.org>
---
 drivers/gpu/drm/virtio/virtgpu_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c 
b/drivers/gpu/drm/virtio/virtgpu_drv.c
index 749db18dcfa2..7975ea06b316 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.c
@@ -166,7 +166,7 @@ static __poll_t virtio_gpu_poll(struct file *filp,
        struct drm_pending_event *e = NULL;
        __poll_t mask = 0;
 
-       if (!vfpriv->ring_idx_mask)
+       if (!vfpriv || !vfpriv->ring_idx_mask)
                return drm_poll(filp, wait);
 
        poll_wait(filp, &drm_file->event_wait, wait);
-- 
2.34.0.rc1.387.gb447b232ab-goog