diff options
| -rw-r--r-- | drivers/net/ethernet/ibm/ibmvnic.c | 147 |
1 files changed, 104 insertions, 43 deletions
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index f4167de30461..af4dfbe28d56 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1827,6 +1827,86 @@ static int ibmvnic_set_mac(struct net_device *netdev, void *p) } /** + * do_change_param_reset returns zero if we are able to keep processing reset + * events, or non-zero if we hit a fatal error and must halt. + */ +static int do_change_param_reset(struct ibmvnic_adapter *adapter, + struct ibmvnic_rwi *rwi, + u32 reset_state) +{ + struct net_device *netdev = adapter->netdev; + int i, rc; + + netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", + rwi->reset_reason); + + netif_carrier_off(netdev); + adapter->reset_reason = rwi->reset_reason; + + ibmvnic_cleanup(netdev); + + if (reset_state == VNIC_OPEN) { + rc = __ibmvnic_close(netdev); + if (rc) + return rc; + } + + release_resources(adapter); + release_sub_crqs(adapter, 1); + release_crq_queue(adapter); + + adapter->state = VNIC_PROBED; + + rc = init_crq_queue(adapter); + + if (rc) { + netdev_err(adapter->netdev, + "Couldn't initialize crq. rc=%d\n", rc); + return rc; + } + + rc = ibmvnic_reset_init(adapter, true); + if (rc) + return IBMVNIC_INIT_FAILED; + + /* If the adapter was in PROBE state prior to the reset, + * exit here. + */ + if (reset_state == VNIC_PROBED) + return 0; + + rc = ibmvnic_login(netdev); + if (rc) { + adapter->state = reset_state; + return rc; + } + + rc = init_resources(adapter); + if (rc) + return rc; + + ibmvnic_disable_irqs(adapter); + + adapter->state = VNIC_CLOSED; + + if (reset_state == VNIC_CLOSED) + return 0; + + rc = __ibmvnic_open(netdev); + if (rc) + return IBMVNIC_OPEN_FAILED; + + /* refresh device's multicast list */ + ibmvnic_set_multi(netdev); + + /* kick napi */ + for (i = 0; i < adapter->req_rx_queues; i++) + napi_schedule(&adapter->napi[i]); + + return 0; +} + +/** * do_reset returns zero if we are able to keep processing reset events, or * non-zero if we hit a fatal error and must halt. */ @@ -1841,12 +1921,10 @@ static int do_reset(struct ibmvnic_adapter *adapter, netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", rwi->reset_reason); - adapter->reset_reason = rwi->reset_reason; - /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ - if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) - rtnl_lock(); + rtnl_lock(); netif_carrier_off(netdev); + adapter->reset_reason = rwi->reset_reason; old_num_rx_queues = adapter->req_rx_queues; old_num_tx_queues = adapter->req_tx_queues; @@ -1858,37 +1936,25 @@ static int do_reset(struct ibmvnic_adapter *adapter, if (reset_state == VNIC_OPEN && adapter->reset_reason != VNIC_RESET_MOBILITY && adapter->reset_reason != VNIC_RESET_FAILOVER) { - if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { - rc = __ibmvnic_close(netdev); - if (rc) - goto out; - } else { - adapter->state = VNIC_CLOSING; - - /* Release the RTNL lock before link state change and - * re-acquire after the link state change to allow - * linkwatch_event to grab the RTNL lock and run during - * a reset. - */ - rtnl_unlock(); - rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); - rtnl_lock(); - if (rc) - goto out; + adapter->state = VNIC_CLOSING; - if (adapter->state != VNIC_CLOSING) { - rc = -1; - goto out; - } + /* Release the RTNL lock before link state change and + * re-acquire after the link state change to allow + * linkwatch_event to grab the RTNL lock and run during + * a reset. + */ + rtnl_unlock(); + rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); + rtnl_lock(); + if (rc) + goto out; - adapter->state = VNIC_CLOSED; + if (adapter->state != VNIC_CLOSING) { + rc = -1; + goto out; } - } - if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { - release_resources(adapter); - release_sub_crqs(adapter, 1); - release_crq_queue(adapter); + adapter->state = VNIC_CLOSED; } if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { @@ -1897,9 +1963,7 @@ static int do_reset(struct ibmvnic_adapter *adapter, */ adapter->state = VNIC_PROBED; - if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { - rc = init_crq_queue(adapter); - } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { + if (adapter->reset_reason == VNIC_RESET_MOBILITY) { rc = ibmvnic_reenable_crq_queue(adapter); release_sub_crqs(adapter, 1); } else { @@ -1939,11 +2003,7 @@ static int do_reset(struct ibmvnic_adapter *adapter, goto out; } - if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { - rc = init_resources(adapter); - if (rc) - goto out; - } else if (adapter->req_rx_queues != old_num_rx_queues || + if (adapter->req_rx_queues != old_num_rx_queues || adapter->req_tx_queues != old_num_tx_queues || adapter->req_rx_add_entries_per_subcrq != old_num_rx_slots || @@ -2004,9 +2064,7 @@ static int do_reset(struct ibmvnic_adapter *adapter, rc = 0; out: - /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ - if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) - rtnl_unlock(); + rtnl_unlock(); return rc; } @@ -2140,7 +2198,10 @@ static void __ibmvnic_reset(struct work_struct *work) } spin_unlock_irqrestore(&adapter->state_lock, flags); - if (adapter->force_reset_recovery) { + if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { + /* CHANGE_PARAM requestor holds rtnl_lock */ + rc = do_change_param_reset(adapter, rwi, reset_state); + } else if (adapter->force_reset_recovery) { /* Transport event occurred during previous reset */ if (adapter->wait_for_reset) { /* Previous was CHANGE_PARAM; caller locked */ |