diff options
| author |   Julian Wiedmann <jwi@linux.vnet.ibm.com> | 2017-10-18 17:40:13 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-10-20 13:11:04 +0100 |
| commit | ce34435641456a680309d84c85b48e004ef45f41 (patch) | |
| tree | c99637c75ac229bbcde7e7ae46bc58b5a54d7b45 /drivers/s390/net/qeth_core_main.c | |
| parent | net/sched: Set the net-device for egress device instance (diff) | |
| download | linux-dev-ce34435641456a680309d84c85b48e004ef45f41.tar.xz linux-dev-ce34435641456a680309d84c85b48e004ef45f41.zip | |
s390/qeth: rely on kernel for feature recovery
When recovering a device, qeth needs to re-run the IPA commands that
enable all previously active HW features.
Instead of duplicating qeth_set_features(), let netdev_update_features()
recover the missing HW features from dev->wanted_features.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 40 |
1 files changed, 18 insertions, 22 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 68e118f1202e..e10e5b8d476c 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -6403,32 +6403,29 @@ static int qeth_set_ipa_tso(struct qeth_card *card, int on) return rc; } -/* try to restore device features on a device after recovery */ -int qeth_recover_features(struct net_device *dev) +#define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO) + +/** + * qeth_recover_features() - Restore device features after recovery + * @dev: the recovering net_device + * + * Caller must hold rtnl lock. + */ +void qeth_recover_features(struct net_device *dev) { + netdev_features_t features = dev->features; struct qeth_card *card = dev->ml_priv; - netdev_features_t recover = dev->features; - - if (recover & NETIF_F_IP_CSUM) { - if (qeth_set_ipa_csum(card, 1, IPA_OUTBOUND_CHECKSUM)) - recover ^= NETIF_F_IP_CSUM; - } - if (recover & NETIF_F_RXCSUM) { - if (qeth_set_ipa_csum(card, 1, IPA_INBOUND_CHECKSUM)) - recover ^= NETIF_F_RXCSUM; - } - if (recover & NETIF_F_TSO) { - if (qeth_set_ipa_tso(card, 1)) - recover ^= NETIF_F_TSO; - } - if (recover == dev->features) - return 0; + /* force-off any feature that needs an IPA sequence. + * netdev_update_features() will restart them. + */ + dev->features &= ~QETH_HW_FEATURES; + netdev_update_features(dev); + if (features == dev->features) + return; dev_warn(&card->gdev->dev, "Device recovery failed to restore all offload features\n"); - dev->features = recover; - return -EIO; } EXPORT_SYMBOL_GPL(qeth_recover_features); @@ -6485,8 +6482,7 @@ netdev_features_t qeth_fix_features(struct net_device *dev, /* if the card isn't up, remove features that require hw changes */ if (card->state == CARD_STATE_DOWN || card->state == CARD_STATE_RECOVER) - features = features & ~(NETIF_F_IP_CSUM | NETIF_F_RXCSUM | - NETIF_F_TSO); + features &= ~QETH_HW_FEATURES; QETH_DBF_HEX(SETUP, 2, &features, sizeof(features)); return features; } |