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s390/qeth: delay netdevice registration

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Re-order the code flow a bit so that all initial HW setup is done before
putting the netdevice into play. For a netdevice that hasn't been
registered before, we also don't need to re-enable its HW features or
check for recovery actions.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2019-01-25 15:44:21 +01:00 committed by David S. Miller
parent 340c0936f2
commit fa3d2e6059
3 changed files with 43 additions and 40 deletions
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9
drivers/s390/net/qeth_core_main.c
View File

@ -5147,13 +5147,6 @@ retriable:
*carrier_ok = true;
}
if (qeth_netdev_is_registered(card->dev)) {
if (*carrier_ok)
netif_carrier_on(card->dev);
else
netif_carrier_off(card->dev);
}
card->options.ipa4.supported_funcs = 0;
card->options.ipa6.supported_funcs = 0;
card->options.adp.supported_funcs = 0;
@ -6538,7 +6531,6 @@ void qeth_enable_hw_features(struct net_device *dev)
struct qeth_card *card = dev->ml_priv;
netdev_features_t features;
rtnl_lock();
features = dev->features;
/* force-off any feature that needs an IPA sequence.
* netdev_update_features() will restart them.
@ -6548,7 +6540,6 @@ void qeth_enable_hw_features(struct net_device *dev)
if (features != dev->features)
dev_warn(&card->gdev->dev,
"Device recovery failed to restore all offload features\n");
rtnl_unlock();
}
EXPORT_SYMBOL_GPL(qeth_enable_hw_features);

40
drivers/s390/net/qeth_l2_main.c
View File

@ -803,9 +803,6 @@ static int qeth_l2_setup_netdev(struct qeth_card *card, bool carrier_ok)
{
int rc;
if (qeth_netdev_is_registered(card->dev))
return 0;
card->dev->priv_flags |= IFF_UNICAST_FLT;
card->dev->netdev_ops = &qeth_l2_netdev_ops;
if (card->info.type == QETH_CARD_TYPE_OSN) {
@ -886,6 +883,7 @@ static void qeth_l2_trace_features(struct qeth_card *card)
static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
struct net_device *dev = card->dev;
int rc = 0;
enum qeth_card_states recover_flag;
bool carrier_ok;
@ -909,10 +907,6 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
qeth_l2_register_dev_addr(card);
rc = qeth_l2_setup_netdev(card, carrier_ok);
if (rc)
goto out_remove;
if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
if (card->info.hwtrap &&
qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
@ -954,18 +948,30 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
qeth_set_allowed_threads(card, 0xffffffff, 0);
qeth_enable_hw_features(card->dev);
if (recover_flag == CARD_STATE_RECOVER) {
if (recovery_mode && !IS_OSN(card)) {
if (!qeth_l2_validate_addr(card->dev)) {
qeth_open_internal(card->dev);
qeth_l2_set_rx_mode(card->dev);
if (!qeth_netdev_is_registered(dev)) {
rc = qeth_l2_setup_netdev(card, carrier_ok);
if (rc)
goto out_remove;
} else {
rtnl_lock();
if (carrier_ok)
netif_carrier_on(dev);
else
netif_carrier_off(dev);
qeth_enable_hw_features(dev);
if (recover_flag == CARD_STATE_RECOVER) {
if (recovery_mode && !IS_OSN(card)) {
if (!qeth_l2_validate_addr(dev)) {
qeth_open_internal(dev);
qeth_l2_set_rx_mode(dev);
}
} else {
dev_open(dev, NULL);
}
} else {
rtnl_lock();
dev_open(card->dev, NULL);
rtnl_unlock();
}
rtnl_unlock();
}
/* let user_space know that device is online */
kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);

34
drivers/s390/net/qeth_l3_main.c
View File

@ -2178,9 +2178,6 @@ static int qeth_l3_setup_netdev(struct qeth_card *card, bool carrier_ok)
unsigned int headroom;
int rc;
if (qeth_netdev_is_registered(card->dev))
return 0;
if (card->info.type == QETH_CARD_TYPE_OSD ||
card->info.type == QETH_CARD_TYPE_OSX) {
if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
@ -2296,6 +2293,7 @@ static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
struct net_device *dev = card->dev;
int rc = 0;
enum qeth_card_states recover_flag;
bool carrier_ok;
@ -2313,10 +2311,6 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
goto out_remove;
}
rc = qeth_l3_setup_netdev(card, carrier_ok);
if (rc)
goto out_remove;
if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
if (card->info.hwtrap &&
qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
@ -2358,14 +2352,26 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
qeth_set_allowed_threads(card, 0xffffffff, 0);
qeth_l3_recover_ip(card);
qeth_enable_hw_features(card->dev);
if (recover_flag == CARD_STATE_RECOVER) {
if (!qeth_netdev_is_registered(dev)) {
rc = qeth_l3_setup_netdev(card, carrier_ok);
if (rc)
goto out_remove;
} else {
rtnl_lock();
if (recovery_mode) {
qeth_open_internal(card->dev);
qeth_l3_set_rx_mode(card->dev);
} else {
dev_open(card->dev, NULL);
if (carrier_ok)
netif_carrier_on(dev);
else
netif_carrier_off(dev);
qeth_enable_hw_features(dev);
if (recover_flag == CARD_STATE_RECOVER) {
if (recovery_mode) {
qeth_open_internal(dev);
qeth_l3_set_rx_mode(dev);
} else {
dev_open(dev, NULL);
}
}
rtnl_unlock();
}