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s390/qeth: add support for constrained HW headers

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Some transmit modes require that the HW header is located in the same
page as the initial protocol headers in skb->data. Let callers specify
the size of this contiguous header range, and enforce it when building
the HW header.

While at it, apply some gentle renaming to the relevant L2 code so that
it matches the L3 code.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann
2018-07-19 12:43:57 +02:00
committed by David S. Miller
parent ba86ceee9d
commit a7c2f4a332
4 changed files with 30 additions and 22 deletions
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3
drivers/s390/net/qeth_l3_main.c
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@@ -2181,7 +2181,8 @@ static int qeth_l3_xmit_offload(struct qeth_card *card, struct sk_buff *skb,
skb_pull(skb, ETH_HLEN);
frame_len = skb->len;
push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, &elements);
push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, 0,
&elements);
if (push_len < 0)
return push_len;
if (!push_len) {