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@xxxxxxxxxxxxx>
---
drivers/s390/net/qeth_core_main.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 5f450df886c6..31720044656a 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -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) !=
--
2.16.4
