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>

diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 2081c189563800dbd801c4bfbbdc630aa0fbbd1f..bb27058fa9f089bdb61a7f4727148b2d8a9bdeed 100644 (file)
--- 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 0cbbc803310f36effe64d47f56bfac9ce58d2100..c00f6db812ac6bd79170c76fc98849299b92bf61 100644 (file)
--- 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) {