Commit 6e52fc44 authored by Jason Wang's avatar Jason Wang Committed by Michael S. Tsirkin
Browse files

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



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

Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210104065503.199631-14-jasowang@redhat.com


Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 75658afb

drivers/virtio/virtio_pci_modern.c

+12 −1
Original line number Diff line number Diff line
@@ -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 */