Re: [PATCH net-next v5 03/15] virtio-net: add priv_flags IFF_NOT_USE_DMA_ADDR

On Wed, 16 Jun 2021 17:27:59 +0800, Jason Wang [off-list ref] wrote:

在 2021/6/10 下午4:21, Xuan Zhuo 写道:

quoted

virtio-net not use dma addr directly. So add this priv_flags
IFF_NOT_USE_DMA_ADDR.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
---
  drivers/net/virtio_net.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 0416a7e00914..6c1233f0ab3e 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c

@@ -3064,7 +3064,7 @@ static int virtnet_probe(struct virtio_device *vdev)

  	/* Set up network device as normal. */
  	dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE |
-			   IFF_TX_SKB_NO_LINEAR;
+			   IFF_TX_SKB_NO_LINEAR | IFF_NOT_USE_DMA_ADDR;

I wonder instead of doing trick like this, how about teach the virtio
core to accept DMA address via sg?

Ok, I will try to do this.

Thanks.

Thanks

quoted

  	dev->netdev_ops = &virtnet_netdev;
  	dev->features = NETIF_F_HIGHDMA;

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