On 2021/2/5 下午11:24, Michael S. Tsirkin wrote:
On Mon, Jan 04, 2021 at 02:55:02PM +0800, Jason Wang wrote:
There's no guarantee that the device can disable a specific virtqueue
through set_vq_ready(). One example is the modern virtio-pci
device. So this patch removes the warning.
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
Do we need the read as a kind of flush though?
The problem is that PCI forbids write 0 to queue_enable. So I'm not sure
what kind of flush do we need here?
Thanks
---
drivers/virtio/virtio_vdpa.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c
index 4a9ddb44b2a7..e28acf482e0c 100644
--- a/drivers/virtio/virtio_vdpa.c
+++ b/drivers/virtio/virtio_vdpa.c
@@ -225,9 +225,8 @@ static void virtio_vdpa_del_vq(struct virtqueue *vq)
list_del(&info->node);
spin_unlock_irqrestore(&vd_dev->lock, flags);
- /* Select and deactivate the queue */
+ /* Select and deactivate the queue (best effort) */
ops->set_vq_ready(vdpa, index, 0);
- WARN_ON(ops->get_vq_ready(vdpa, index));
vring_del_virtqueue(vq);
--
2.25.1
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