From: Dave Airlie airlied@redhat.com
Signed-off-by: Dave Airlie airlied@redhat.com Signed-off-by: Gerd Hoffmann kraxel@redhat.com --- drivers/gpu/drm/virtio/virtgpu_drv.h | 1 + drivers/gpu/drm/virtio/virtgpu_vq.c | 7 +++++++ 2 files changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index ff8de3d..6d4db2d 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -162,6 +162,7 @@ struct virtio_gpu_device { struct virtio_gpu_queue ctrlq; struct virtio_gpu_queue cursorq; struct list_head free_vbufs; + spinlock_t free_vbufs_lock; void *vbufs; bool vqs_ready;
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index c506792..1698669f 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -79,6 +79,7 @@ int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev) void *ptr;
INIT_LIST_HEAD(&vgdev->free_vbufs); + spin_lock_init(&vgdev->free_vbufs_lock); count += virtqueue_get_vring_size(vgdev->ctrlq.vq); count += virtqueue_get_vring_size(vgdev->cursorq.vq); size = count * VBUFFER_SIZE; @@ -106,6 +107,7 @@ void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev) count += virtqueue_get_vring_size(vgdev->ctrlq.vq); count += virtqueue_get_vring_size(vgdev->cursorq.vq);
+ spin_lock(&vgdev->free_vbufs_lock); for (i = 0; i < count; i++) { if (WARN_ON(list_empty(&vgdev->free_vbufs))) return; @@ -113,6 +115,7 @@ void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev) struct virtio_gpu_vbuffer, list); list_del(&vbuf->list); } + spin_unlock(&vgdev->free_vbufs_lock); kfree(vgdev->vbufs); }
@@ -123,10 +126,12 @@ virtio_gpu_get_vbuf(struct virtio_gpu_device *vgdev, { struct virtio_gpu_vbuffer *vbuf;
+ spin_lock(&vgdev->free_vbufs_lock); BUG_ON(list_empty(&vgdev->free_vbufs)); vbuf = list_first_entry(&vgdev->free_vbufs, struct virtio_gpu_vbuffer, list); list_del(&vbuf->list); + spin_unlock(&vgdev->free_vbufs_lock); memset(vbuf, 0, VBUFFER_SIZE);
BUG_ON(size > MAX_INLINE_CMD_SIZE); @@ -201,7 +206,9 @@ static void free_vbuf(struct virtio_gpu_device *vgdev, if (vbuf->resp_size > MAX_INLINE_RESP_SIZE) kfree(vbuf->resp_buf); kfree(vbuf->data_buf); + spin_lock(&vgdev->free_vbufs_lock); list_add(&vbuf->list, &vgdev->free_vbufs); + spin_unlock(&vgdev->free_vbufs_lock); }
static void reclaim_vbufs(struct virtqueue *vq, struct list_head *reclaim_list)