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virtio/virtio-net: calculate the correct buffer number 

Avoid exceed the virtqueue length limit when adding buffer to the
virtqueue.

Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
This commit is contained in:
Bowen Wang 2024-06-20 21:17:11 +08:00 committed by Xiang Xiao
parent 280538adc6
commit c0edb0f402
1 changed files with 4 additions and 4 deletions
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8
drivers/virtio/virtio-net.c
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@ -579,10 +579,10 @@ static int virtio_net_init(FAR struct virtio_net_priv_s *priv,
priv->bufnum = CONFIG_IOB_NBUFFERS / VIRTIO_NET_MAX_NIOB / 4;
#endif
priv->bufnum = MIN(vdev->vrings_info[VIRTIO_NET_RX].info.num_descs,
priv->bufnum);
priv->bufnum = MIN(vdev->vrings_info[VIRTIO_NET_TX].info.num_descs,
priv->bufnum);
priv->bufnum = MIN(vdev->vrings_info[VIRTIO_NET_RX].info.num_descs /
(VIRTIO_NET_MAX_NIOB + 1), priv->bufnum);
priv->bufnum = MIN(vdev->vrings_info[VIRTIO_NET_TX].info.num_descs /
(VIRTIO_NET_MAX_NIOB + 1), priv->bufnum);
return OK;
}