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| author | Gerd Hoffmann <kraxel@redhat.com> | 2015-08-19 23:35:57 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2015-10-16 10:43:59 +0200 |
| commit | 9c73f4782642c785569ad50e01324002d160bd09 (patch) | |
| tree | e7a26402d99409135f3df8f65e7c03e0c304e7e2 /drivers/gpu/drm/virtio | |
| parent | 25cb62b76430a91cc6195f902e61c2cb84ade622 (diff) | |
| download | linux-9c73f4782642c785569ad50e01324002d160bd09.tar.bz2 | |
virtio-gpu: add virtio_gpu_queue_ctrl_buffer_locked
Add virtio_gpu_queue_ctrl_buffer_locked function, which does the same as
virtio_gpu_queue_ctrl_buffer but does not take the virtqueue lock. The
caller must hold the lock instead.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/virtio')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_vq.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index 1698669f4185..5b9bc242890f 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -293,8 +293,8 @@ void virtio_gpu_dequeue_cursor_func(struct work_struct *work) wake_up(&vgdev->cursorq.ack_queue); } -static int virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev, - struct virtio_gpu_vbuffer *vbuf) +static int virtio_gpu_queue_ctrl_buffer_locked(struct virtio_gpu_device *vgdev, + struct virtio_gpu_vbuffer *vbuf) { struct virtqueue *vq = vgdev->ctrlq.vq; struct scatterlist *sgs[3], vcmd, vout, vresp; @@ -320,7 +320,6 @@ static int virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev, incnt++; } - spin_lock(&vgdev->ctrlq.qlock); retry: ret = virtqueue_add_sgs(vq, sgs, outcnt, incnt, vbuf, GFP_ATOMIC); if (ret == -ENOSPC) { @@ -331,13 +330,23 @@ retry: } else { virtqueue_kick(vq); } - spin_unlock(&vgdev->ctrlq.qlock); if (!ret) ret = vq->num_free; return ret; } +static int virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev, + struct virtio_gpu_vbuffer *vbuf) +{ + int rc; + + spin_lock(&vgdev->ctrlq.qlock); + rc = virtio_gpu_queue_ctrl_buffer_locked(vgdev, vbuf); + spin_unlock(&vgdev->ctrlq.qlock); + return rc; +} + static int virtio_gpu_queue_cursor(struct virtio_gpu_device *vgdev, struct virtio_gpu_vbuffer *vbuf) { |