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Date: Mon, 4 Jan 2021 14:54:57 +0800 From: Jason Wang <jasowang@...hat.com> To: mst@...hat.com, virtualization@...ts.linux-foundation.org, linux-kernel@...r.kernel.org Cc: shahafs@...lanox.com, lulu@...hat.com, sgarzare@...hat.com, rdunlap@...radead.org, Jason Wang <jasowang@...hat.com> Subject: [PATCH V3 13/19] 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@...hat.com> --- drivers/virtio/virtio_pci_modern.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) 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 */ -- 2.25.1
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