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Message-Id: <1393561965-3688-6-git-send-email-aaron.f.brown@intel.com> Date: Thu, 27 Feb 2014 20:32:44 -0800 From: Aaron Brown <aaron.f.brown@...el.com> To: davem@...emloft.net Cc: Emil Tantilov <emil.s.tantilov@...el.com>, netdev@...r.kernel.org, gospo@...hat.com, sassmann@...hat.com, Aaron Brown <aaron.f.brown@...el.com> Subject: [net-next 5/6] ixgbevf: fix handling of tx checksumming From: Emil Tantilov <emil.s.tantilov@...el.com> This patch resolves an issue introduced by: commit 7ad1a093519e37fb673579819bf6af122641c397 ixgbevf: make the first tx_buffer a repository for most of the skb info Incorrect check for the result of ixgbevf_tso() can lead to calling ixgbevf_tx_csum() which can spawn 2 context descriptors and result in performance degradation and/or corrupted packets. Signed-off-by: Emil Tantilov <emil.s.tantilov@...el.com> Tested-by: Phil Schmitt <phillip.j.schmitt@...el.com> Signed-off-by: Aaron Brown <aaron.f.brown@...el.com> --- drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index a6af7b7..79023ba 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -3155,7 +3155,7 @@ static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev) tso = ixgbevf_tso(tx_ring, first, &hdr_len); if (tso < 0) goto out_drop; - else + else if (!tso) ixgbevf_tx_csum(tx_ring, first); ixgbevf_tx_map(tx_ring, first, hdr_len); -- 1.8.5.GIT -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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