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virtio_pci: use priv for vq notification 

slightly reduce the amount of pointer chasing this needs to do.
More importantly, this will easily generalize to virtio 1.0.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2014-12-03 18:01:58 +02:00
parent 3ec7a77bb3
commit f30eaf4a09
1 changed files with 2 additions and 3 deletions
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5
drivers/virtio/virtio_pci.c
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@ -204,11 +204,9 @@ static void vp_reset(struct virtio_device *vdev)
/* the notify function used when creating a virt queue */
static bool vp_notify(struct virtqueue *vq)
{
struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev);
/* we write the queue's selector into the notification register to
* signal the other end */
iowrite16(vq->index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_NOTIFY);
iowrite16(vq->index, (void __iomem *)vq->priv);
return true;
}
@ -437,6 +435,7 @@ static struct virtqueue *setup_vq(struct virtio_device *vdev, unsigned index,
goto out_activate_queue;
}
vq->priv = (void __force *)vp_dev->ioaddr + VIRTIO_PCI_QUEUE_NOTIFY;
info->vq = vq;
if (msix_vec != VIRTIO_MSI_NO_VECTOR) {