diff options
| author | Jason Wang <jasowang@redhat.com> | 2021-01-04 14:54:57 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-02-23 07:52:58 -0500 |
| commit | 6e52fc446d32a82936f05106ffeef5cf8529e6c4 (patch) | |
| tree | c9ead0e93c51cb9a424ccb7103979a3970ab4250 /drivers/virtio | |
| parent | 75658afbab57706c241ca7d60559ebefd631fc6f (diff) | |
| download | linux-6e52fc446d32a82936f05106ffeef5cf8529e6c4.tar.gz linux-6e52fc446d32a82936f05106ffeef5cf8529e6c4.tar.xz | |
virtio-pci-modern: introduce helper for getting queue nums
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>
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio_pci_modern.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index 7a89226135af..bccad1329871 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -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 */ |