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igb: Make TSO check for CHECKSUM_PARTIAL to avoid skb_is_gso check

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This change is meant to reduce the overhead for workloads that are not
using either TSO or checksum offloads.  Most of the time the compiler
should jump ahead after failing this check to the VLAN check since in the
igb_tx_csum call we start with that check as well.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2012-11-13 04:03:22 +00:00 committed by David S. Miller
parent 039454a818
commit ed6aa10580
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/intel/igb/igb_main.c
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@ -3998,6 +3998,9 @@ static int igb_tso(struct igb_ring *tx_ring,
u32 vlan_macip_lens, type_tucmd;
u32 mss_l4len_idx, l4len;
if (skb->ip_summed != CHECKSUM_PARTIAL)
return 0;
if (!skb_is_gso(skb))
return 0;