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authorJason Wang <jasowang@redhat.com>2021-01-04 09:54:57 +0300
committerMichael S. Tsirkin <mst@redhat.com>2021-02-23 15:52:58 +0300
commit6e52fc446d32a82936f05106ffeef5cf8529e6c4 (patch)
treec9ead0e93c51cb9a424ccb7103979a3970ab4250 /drivers/virtio
parent75658afbab57706c241ca7d60559ebefd631fc6f (diff)
downloadlinux-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.c13
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 */