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qeth: omit upstream checksumming for HiperSockets

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For HiperSocket devices receive-path checksumming is not required.
Thus NO_CHECKSUMMING is used as default for HiperSocket interfaces.
For layer3 devices configured with NO_CHECKSUMMING received skbs
should have set their ip_summed field to CHECKSUM_UNNECESSARY.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2009-05-19 21:38:40 +00:00 committed by David S. Miller
parent 0666eb06ab
commit b91398008c
2 changed files with 15 additions and 7 deletions
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2
drivers/s390/net/qeth_core_main.c
View File

@ -1140,6 +1140,8 @@ static int qeth_setup_card(struct qeth_card *card)
card->ipato.enabled = 0;
card->ipato.invert4 = 0;
card->ipato.invert6 = 0;
if (card->info.type == QETH_CARD_TYPE_IQD)
card->options.checksum_type = NO_CHECKSUMMING;
/* init QDIO stuff */
qeth_init_qdio_info(card);
return 0;

20
drivers/s390/net/qeth_l3_main.c
View File

@ -1920,16 +1920,22 @@ static inline __u16 qeth_l3_rebuild_skb(struct qeth_card *card,
hdr->hdr.l3.vlan_id : *((u16 *)&hdr->hdr.l3.dest_addr[12]);
}
skb->ip_summed = card->options.checksum_type;
if (card->options.checksum_type == HW_CHECKSUMMING) {
switch (card->options.checksum_type) {
case SW_CHECKSUMMING:
skb->ip_summed = CHECKSUM_NONE;
break;
case NO_CHECKSUMMING:
skb->ip_summed = CHECKSUM_UNNECESSARY;
break;
case HW_CHECKSUMMING:
if ((hdr->hdr.l3.ext_flags &
(QETH_HDR_EXT_CSUM_HDR_REQ |
QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
(QETH_HDR_EXT_CSUM_HDR_REQ |
QETH_HDR_EXT_CSUM_TRANSP_REQ))
(QETH_HDR_EXT_CSUM_HDR_REQ |
QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
(QETH_HDR_EXT_CSUM_HDR_REQ |
QETH_HDR_EXT_CSUM_TRANSP_REQ))
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb->ip_summed = SW_CHECKSUMMING;
skb->ip_summed = CHECKSUM_NONE;
}
return vlan_id;