From 6aff0bf641cf69e487d7b46fc8be773d161f814d Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 12 Apr 2017 13:27:03 +1000 Subject: ftgmac100: Disable HW checksum generation on AST2400, enable on others We found out that HW checksum generation only works from AST2500 onward. This disables it on AST2400 and removes the "no-hw-checksum" properties in the device-trees. The problem we had wasn't related to NC-SI. Also rework the logic testing for that property so it can be used to disable HW checksum generation and checking regardless of whether NC-SI is used or not in case other variants out there need this. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: David S. Miller --- drivers/net/ethernet/faraday/ftgmac100.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'drivers/net/ethernet/faraday') diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index e793d353882f..099309920d6a 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -1473,15 +1473,15 @@ static int ftgmac100_probe(struct platform_device *pdev) goto err_setup_mdio; } - /* We have to disable on-chip IP checksum functionality - * when NCSI is enabled on the interface. It doesn't work - * in that case. - */ + /* Base feature set */ netdev->features = NETIF_F_RXCSUM | NETIF_F_HW_CSUM | NETIF_F_GRO | NETIF_F_SG; - if (priv->use_ncsi && - of_get_property(np, "no-hw-checksum", NULL)) + + /* AST2400 doesn't have working HW checksum generation */ + if (np && (of_device_is_compatible(np, "aspeed,ast2400-mac"))) netdev->features &= ~NETIF_F_HW_CSUM; + if (np && of_get_property(np, "no-hw-checksum", NULL)) + netdev->features &= ~(NETIF_F_HW_CSUM | NETIF_F_RXCSUM); /* register network device */ err = register_netdev(netdev); -- cgit v1.2.3