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authorMichael S. Tsirkin <mst@redhat.com>2014-12-03 19:01:58 +0300
committerMichael S. Tsirkin <mst@redhat.com>2014-12-09 22:42:02 +0300
commitf30eaf4a09482c8dad0f65c616de10a2321839c9 (patch)
treea2fa0d476f8c7aa0c7d9a53fe1a762b5e88b1b49 /drivers/virtio
parent3ec7a77bb3089bb01032fdbd958eb5c29da58b49 (diff)
downloadlinux-f30eaf4a09482c8dad0f65c616de10a2321839c9.tar.xz
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>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio_pci.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
index 6a7b8bff51e5..7b82eb5c0c5a 100644
--- a/drivers/virtio/virtio_pci.c
+++ b/drivers/virtio/virtio_pci.c
@@ -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) {