From: Julian Wiedmann <jwi@linux.ibm.com>
Subject: s390/qeth: query IPv6 assists during hardsetup
Patch-mainline: v4.18-rc1
Git-commit: ee75fb8615497c885a62337aeba375211e3baece
References: FATE#326350, LTC#169511, bsc#1113509

Summary:     qeth: performance improvements
Description: This adds recent functional and performance improvements for the
             qeth network driver.
             Primarily this brings Scatter-Gather support for HiperSockets,
             reduced CPU consumption in the L3 IPv4 transmit path for OSA,
             improved Promiscuous Mode performance due to IFF_UNICAST_FLT,
             support for Scatter-Gather on z/VM virtual NICs, and
             support for delayed GRO flushing.

             For sanity & stability reasons, this effectively constitutes a
             backport of the qeth device driver from 4.19 mainline.
             

Upstream-Description:

             s390/qeth: query IPv6 assists during hardsetup

             For new functionality, the L2 subdriver will start using IPv6 assists.
             So move the query from the L3 subdriver into the common setup path.

             Signed-off-by: Kittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
             Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
             Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/s390/net/qeth_core_main.c |    5 +++++
 drivers/s390/net/qeth_l3_main.c   |    8 --------
 2 files changed, 5 insertions(+), 8 deletions(-)

--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -5212,6 +5212,11 @@ retriable:
 	rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
 	if (rc == -ENOMEM)
 		goto out;
+	if (qeth_is_supported(card, IPA_IPV6)) {
+		rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
+		if (rc == -ENOMEM)
+			goto out;
+	}
 	if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
 		rc = qeth_query_setadapterparms(card);
 		if (rc < 0) {
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -851,14 +851,6 @@ static int qeth_l3_softsetup_ipv6(struct
 
 	QETH_CARD_TEXT(card, 3, "softipv6");
 
-	rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
-	if (rc) {
-		dev_err(&card->gdev->dev,
-			"Activating IPv6 support for %s failed\n",
-			QETH_CARD_IFNAME(card));
-		return rc;
-	}
-
 	if (card->info.type == QETH_CARD_TYPE_IQD)
 		goto out;