cxgb3 - fix port up/down error path

Fix faiures path when ports are stopped and restarted
in EEH recovery.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

2 files changed, 18 insertions, 15 deletions

diff --git a/drivers/net/cxgb3/adapter.h b/drivers/net/cxgb3/adapter.h
index 4fdb13f8447b..acebe431d068 100644
--- a/drivers/net/cxgb3/adapter.h
+++ b/drivers/net/cxgb3/adapter.h
@@ -71,6 +71,7 @@ enum {				/* adapter flags */
         USING_MSIX = (1 << 2),
         QUEUES_BOUND = (1 << 3),
         TP_PARITY_INIT = (1 << 4),
+        NAPI_INIT = (1 << 5),
 };
 
 struct fl_pg_chunk {
diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
index ce949d5fae39..d67fc10a6b36 100644
--- a/drivers/net/cxgb3/cxgb3_main.c
+++ b/drivers/net/cxgb3/cxgb3_main.c
@@ -421,6 +421,13 @@ static void init_napi(struct adapter *adap)
                         netif_napi_add(qs->netdev, &qs->napi, qs->napi.poll,
                                        64);
         }
+
+        /*
+         * netif_napi_add() can be called only once per napi_struct because it
+         * adds each new napi_struct to a list.  Be careful not to call it a
+         * second time, e.g., during EEH recovery, by making a note of it.
+         */
+        adap->flags |= NAPI_INIT;
 }
 
 /*
@@ -896,7 +903,8 @@ static int cxgb_up(struct adapter *adap)
                         goto out;
 
                 setup_rss(adap);
-                init_napi(adap);
+                if (!(adap->flags & NAPI_INIT))
+                        init_napi(adap);
                 adap->flags |= FULL_INIT_DONE;
         }
 
@@ -999,7 +1007,7 @@ static int offload_open(struct net_device *dev)
                 return 0;
 
         if (!adap_up && (err = cxgb_up(adapter)) < 0)
-                return err;
+                goto out;
 
         t3_tp_set_offload_mode(adapter, 1);
         tdev->lldev = adapter->port[0];
@@ -1061,10 +1069,8 @@ static int cxgb_open(struct net_device *dev)
         int other_ports = adapter->open_device_map & PORT_MASK;
         int err;
 
-        if (!adapter->open_device_map && (err = cxgb_up(adapter)) < 0) {
-                quiesce_rx(adapter);
+        if (!adapter->open_device_map && (err = cxgb_up(adapter)) < 0)
                 return err;
-        }
 
         set_bit(pi->port_id, &adapter->open_device_map);
         if (is_offload(adapter) && !ofld_disable) {
@@ -2431,7 +2437,7 @@ static pci_ers_result_t t3_io_error_detected(struct pci_dev *pdev,
 
         pci_disable_device(pdev);
 
-        /* Request a slot slot reset. */
+        /* Request a slot reset. */
         return PCI_ERS_RESULT_NEED_RESET;
 }
 
@@ -2448,13 +2454,16 @@ static pci_ers_result_t t3_io_slot_reset(struct pci_dev *pdev)
         if (pci_enable_device(pdev)) {
                 dev_err(&pdev->dev,
                         "Cannot re-enable PCI device after reset.\n");
-                return PCI_ERS_RESULT_DISCONNECT;
+                goto err;
         }
         pci_set_master(pdev);
 
-        t3_prep_adapter(adapter, adapter->params.info, 1);
+        if (t3_prep_adapter(adapter, adapter->params.info, 1))
+                goto err;
 
         return PCI_ERS_RESULT_RECOVERED;
+err:
+        return PCI_ERS_RESULT_DISCONNECT;
 }
 
 /**
@@ -2483,13 +2492,6 @@ static void t3_io_resume(struct pci_dev *pdev)
                         netif_device_attach(netdev);
                 }
         }
-
-        if (is_offload(adapter)) {
-                __set_bit(OFFLOAD_DEVMAP_BIT, &adapter->registered_device_map);
-                if (offload_open(adapter->port[0]))
-                        printk(KERN_WARNING
-                               "Could not bring back offload capabilities\n");
-        }
 }
 
 static struct pci_error_handlers t3_err_handler = {