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authorUrsula Braun <ubraun@linux.vnet.ibm.com>2016-09-15 14:39:26 +0200
committerDavid S. Miller <davem@davemloft.net>2016-09-16 04:29:14 -0400
commit5722963a8e83309dad831cf6968c4c805aa342c0 (patch)
tree2beaafe88328f1c6baa4a5872b17886d4393f293 /drivers/s390/net
parent243f750fc6f5d8e4dec984a9a785941c67452b8f (diff)
qeth: do not turn on SG per default
According to recent performance measurements, turning on net_device feature NETIF_F_SG only behaves well, but turning on feature NETIF_F_GSO shows bad results. Since the kernel activates NETIF_F_GSO automatically as soon as the driver configures feature NETIF_F_SG, qeth should not activate feature NETIF_F_SG per default, until the qeth problems with NETIF_F_GSO are solved. Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net')
-rw-r--r--drivers/s390/net/qeth_l2_main.c2
-rw-r--r--drivers/s390/net/qeth_l3_main.c1
2 files changed, 0 insertions, 3 deletions
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 2081c1895638..bb27058fa9f0 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -1124,8 +1124,6 @@ static int qeth_l2_setup_netdev(struct qeth_card *card)
card->dev->hw_features |= NETIF_F_RXCSUM;
card->dev->vlan_features |= NETIF_F_RXCSUM;
}
- /* Turn on SG per default */
- card->dev->features |= NETIF_F_SG;
}
card->info.broadcast_capable = 1;
qeth_l2_request_initial_mac(card);
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 0cbbc803310f..c00f6db812ac 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -3120,7 +3120,6 @@ static int qeth_l3_setup_netdev(struct qeth_card *card)
card->dev->vlan_features = NETIF_F_SG |
NETIF_F_RXCSUM | NETIF_F_IP_CSUM |
NETIF_F_TSO;
- card->dev->features = NETIF_F_SG;
}
}
} else if (card->info.type == QETH_CARD_TYPE_IQD) {