net: do not do gso for CHECKSUM_UNNECESSARY in netif_needs_gso
This is related to fixing the bug of dropping FCoE frames when disabling tx ip checksum by 'ethtool -K ethx tx off'. The FCoE protocol stack driver would use CHECKSUM_UNNECESSARY on tx path instead of CHECKSUM_PARTIAL (as indicated in the 2/2 of this series). To do so, netif_needs_gso() has to be changed here to not do gso for both CHECKSUM_PARTIAL and CHECKSUM_UNNECESSARY. Ref. to original discussion thread: http://patchwork.ozlabs.org/patch/146567/ Signed-off-by: Yi Zou <yi.zou@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -2657,7 +2657,8 @@ static inline bool netif_needs_gso(struct sk_buff *skb,
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netdev_features_t features)
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{
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return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
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unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
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unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
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(skb->ip_summed != CHECKSUM_UNNECESSARY)));
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}
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static inline void netif_set_gso_max_size(struct net_device *dev,
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