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virtio-pci-modern: introduce helper for getting queue nums

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This patch introduces helper for getting queue num of modern device.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210104065503.199631-14-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2021-01-04 14:54:57 +08:00 committed by Michael S. Tsirkin
parent 75658afbab
commit 6e52fc446d
1 changed files with 12 additions and 1 deletions
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13
drivers/virtio/virtio_pci_modern.c
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@ -292,6 +292,17 @@ static u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
}
/*
* vp_modern_get_num_queues - get the number of virtqueues
* @mdev: the modern virtio-pci device
*
* Returns the number of virtqueues
*/
static u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev)
{
return vp_ioread16(&mdev->common->num_queues);
}
/* virtio config->finalize_features() implementation */
static int vp_finalize_features(struct virtio_device *vdev)
{
@ -510,7 +521,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
u16 num, off;
int err;
if (index >= vp_ioread16(&cfg->num_queues))
if (index >= vp_modern_get_num_queues(mdev))
return ERR_PTR(-ENOENT);
/* Select the queue we're interested in */