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net: Make RX-FCS and HW GRO mutually exclusive 

Same as LRO, hardware GRO cannot be enabled with RX-FCS.
When both are requested, hardware GRO will be dropped.

Suggested-by: David Miller <davem@davemloft.net>
Signed-off-by: Gal Pressman <galp@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gal Pressman 2018-03-12 11:48:49 +02:00 committed by David S. Miller
parent 678f4bda35
commit de8d5ab2ff
1 changed files with 11 additions and 4 deletions
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15
net/core/dev.c
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@ -7549,10 +7549,17 @@ static netdev_features_t netdev_fix_features(struct net_device *dev,
}
}
/* LRO feature cannot be combined with RX-FCS */
if ((features & NETIF_F_LRO) && (features & NETIF_F_RXFCS)) {
netdev_dbg(dev, "Dropping LRO feature since RX-FCS is requested.\n");
features &= ~NETIF_F_LRO;
/* LRO/HW-GRO features cannot be combined with RX-FCS */
if (features & NETIF_F_RXFCS) {
if (features & NETIF_F_LRO) {
netdev_dbg(dev, "Dropping LRO feature since RX-FCS is requested.\n");
features &= ~NETIF_F_LRO;
}
if (features & NETIF_F_GRO_HW) {
netdev_dbg(dev, "Dropping HW-GRO feature since RX-FCS is requested.\n");
features &= ~NETIF_F_GRO_HW;
}
}
return features;