> for example, > file: drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c > static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent) > > netdev->priv_flags |= IFF_UNICAST_FLT; > > + /* MTU range: 81 - 9600 */ > + netdev->min_mtu = 81; > + netdev->max_mtu = MAX_MTU;
In this cause, the driver is not using the default values. So it sets them. Anyway, try it. After your alloc_etherdev_mqs(), print the value of min_mtu. It should already be set to MIN_ETH_MTU. > I see. IMHO HNS3 is currently limited by maximum buffer per descriptor > which is 64k. I am sure such frames would get dropped in the hardware > itself and which I guess should be more preferable than dropping in > driver since it saves you some precious cpu cycles? If you hardware handles this, then you don't need to do anything. Andrew
