s390/qeth: consistently re-enable device features

commit e830baa9c3f0 ("qeth: restore device features after recovery") and
commit ce3443564145 ("s390/qeth: rely on kernel for feature recovery")
made sure that the HW functions for device features get re-programmed
after recovery.

But we missed that the same handling is also required when a card is
first set offline (destroying all HW context), and then online again.
Fix this by moving the re-enable action out of the recovery-only path.

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

diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index 940fd7b..a246a61 100644 (file)
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -1040,7 +1040,7 @@ struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *,
                                                 __u16, __u16,
                                                 enum qeth_prot_versions);
 int qeth_set_features(struct net_device *, netdev_features_t);
-void qeth_recover_features(struct net_device *dev);
+void qeth_enable_hw_features(struct net_device *dev);
 netdev_features_t qeth_fix_features(struct net_device *, netdev_features_t);
 netdev_features_t qeth_features_check(struct sk_buff *skb,
                                      struct net_device *dev,

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index d20a69a..d01ac29 100644 (file)
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -6469,28 +6469,27 @@ static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
 #define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \
                          NETIF_F_IPV6_CSUM)
 /**
- * qeth_recover_features() - Restore device features after recovery
- * @dev:       the recovering net_device
- *
- * Caller must hold rtnl lock.
+ * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
+ * @dev:       a net_device
  */
-void qeth_recover_features(struct net_device *dev)
+void qeth_enable_hw_features(struct net_device *dev)
 {
-       netdev_features_t features = dev->features;
        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.
         */
        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");
+       if (features != dev->features)
+               dev_warn(&card->gdev->dev,
+                        "Device recovery failed to restore all offload features\n");
+       rtnl_unlock();
 }
-EXPORT_SYMBOL_GPL(qeth_recover_features);
+EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
 
 int qeth_set_features(struct net_device *dev, netdev_features_t features)
 {

diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 5464515..2487f0a 100644 (file)
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -1119,6 +1119,8 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
                netif_carrier_off(card->dev);
 
        qeth_set_allowed_threads(card, 0xffffffff, 0);
+
+       qeth_enable_hw_features(card->dev);
        if (recover_flag == CARD_STATE_RECOVER) {
                if (recovery_mode &&
                    card->info.type != QETH_CARD_TYPE_OSN) {
@@ -1130,9 +1132,6 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
                }
                /* this also sets saved unicast addresses */
                qeth_l2_set_rx_mode(card->dev);
-               rtnl_lock();
-               qeth_recover_features(card->dev);
-               rtnl_unlock();
        }
        /* let user_space know that device is online */
        kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);

diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index e7fa479..5905dc6 100644 (file)
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -2662,6 +2662,8 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
                netif_carrier_on(card->dev);
        else
                netif_carrier_off(card->dev);
+
+       qeth_enable_hw_features(card->dev);
        if (recover_flag == CARD_STATE_RECOVER) {
                rtnl_lock();
                if (recovery_mode)
@@ -2669,7 +2671,6 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
                else
                        dev_open(card->dev);
                qeth_l3_set_rx_mode(card->dev);
-               qeth_recover_features(card->dev);
                rtnl_unlock();
        }
        qeth_trace_features(card);