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s390/qeth: enable only required csum offload features

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Current code attempts to enable all advertised HW csum offload features.
Future-proof this by enabling only those features that we actually use.

Also, the IPv4 header csum feature is only needed for TX on L3 devices.

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 2019-02-12 18:33:18 +01:00 committed by David S. Miller
parent c21532771e
commit 7e83747dc9
1 changed files with 9 additions and 2 deletions
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11
drivers/s390/net/qeth_core_main.c
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@ -6329,8 +6329,11 @@ static int qeth_send_checksum_on(struct qeth_card *card, int cstype,
struct qeth_checksum_cmd chksum_cb;
int rc;
if (prot == QETH_PROT_IPV4)
/* some L3 HW requires combined L3+L4 csum offload: */
if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
cstype == IPA_OUTBOUND_CHECKSUM)
required_features |= QETH_IPA_CHECKSUM_IP_HDR;
rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_START, 0,
&chksum_cb, prot);
if (!rc) {
@ -6351,8 +6354,12 @@ static int qeth_send_checksum_on(struct qeth_card *card, int cstype,
prot, QETH_CARD_IFNAME(card));
return rc;
}
if (chksum_cb.supported & QETH_IPA_CHECKSUM_LP2LP)
required_features |= QETH_IPA_CHECKSUM_LP2LP;
rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
chksum_cb.supported, &chksum_cb,
required_features, &chksum_cb,
prot);
if (!rc) {
if ((required_features & chksum_cb.enabled) !=