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qeth: repair SBAL elements calculation
When sending skbs, qeth determines the number of qdio SBAL elements required. If qeth sends a fragmented skb, the SBAL element number calculation is wrong, because the fragmented data part is added twice in qeth_l3_tso_elements(). This patch makes sure fragmented data is handled in qeth_elements_for_frags() only, while qeth_l3_tso_elements() starts calculation of qdio SBAL elements just with the linear data part of the skb. Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -2797,7 +2797,7 @@ static inline int qeth_l3_tso_elements(struct sk_buff *skb)
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{
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unsigned long tcpd = (unsigned long)tcp_hdr(skb) +
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tcp_hdr(skb)->doff * 4;
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int tcpd_len = skb->len - (tcpd - (unsigned long)skb->data);
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int tcpd_len = skb_headlen(skb) - (tcpd - (unsigned long)skb->data);
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int elements = PFN_UP(tcpd + tcpd_len - 1) - PFN_DOWN(tcpd);
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elements += qeth_get_elements_for_frags(skb);
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