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virtio-gpu: add & use virtio_gpu_queue_fenced_ctrl_buffer

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Add helper function to handle the submission of fenced control requests.
Make sure we initialize the fence while holding the virtqueue lock, so
requests can't be reordered.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann
2015-08-19 23:44:15 +02:00
parent 9c73f47826
commit ec2f0577c7
2 changed files with 35 additions and 7 deletions
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2
drivers/gpu/drm/virtio/virtgpu_fence.c
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@@ -81,7 +81,7 @@ int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
struct virtio_gpu_fence_driver *drv = &vgdev->fence_drv;
unsigned long irq_flags;
*fence = kmalloc(sizeof(struct virtio_gpu_fence), GFP_KERNEL);
*fence = kmalloc(sizeof(struct virtio_gpu_fence), GFP_ATOMIC);
if ((*fence) == NULL)
return -ENOMEM;