From cf64bc8f093581d0697b65ea8dd04bdd27a676b0 Mon Sep 17 00:00:00 2001 From: Yi Zou Date: Fri, 16 Mar 2012 23:08:12 +0000 Subject: [PATCH] fcoe: use CHECKSUM_UNNECESSARY instead of CHECKSUM_PARTIAL on tx Fix a bug when using 'ethtool -K ethx tx off' to turn off tx ip checksum, FCoE CRC offload should not be impacte. The skb_checksum_help() is needed only if it's not FCoE traffic for ip checksum, regardless of ethtool toggling the tx ip checksum on or off. Instead of using CHECKSUM_PARTIAL, we will use CHECKSUM_UNNECESSARY as a proper indication to avoid sw ip checksum on FCoE frames. Ref. to original discussion thread: http://patchwork.ozlabs.org/patch/146567/ CC: "James E.J. Bottomley" CC: Robert Love Signed-off-by: Yi Zou Tested-by: Ross Brattain Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/scsi/fcoe/fcoe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c index e959960..c164890 100644 --- a/drivers/scsi/fcoe/fcoe.c +++ b/drivers/scsi/fcoe/fcoe.c @@ -1498,7 +1498,7 @@ static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) /* crc offload */ if (likely(lport->crc_offload)) { - skb->ip_summed = CHECKSUM_PARTIAL; + skb->ip_summed = CHECKSUM_UNNECESSARY; skb->csum_start = skb_headroom(skb); skb->csum_offset = skb->len; crc = 0; -- 2.7.4