i40e: Change some init flow for the client

This change makes a common flow for Client instance open during init
and reset path. The Client subtask can handle both the cases instead of
making a separate notify_client_of_open call.
Also it may fix a bug during reset where the service task was leaking
some memory and causing issues.

Change-Id: I7232a32fd52b82e863abb54266fa83122f80a0cd
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_client.c b/drivers/net/ethernet/intel/i40e/i40e_client.c
index e1370c556a3c3e90aa69e942d927dc78add80bfa..618f18436618945b807c5e08f499dc1a4cd689cf 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_client.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_client.c
@@ -199,6 +199,7 @@ void i40e_notify_client_of_l2_param_changes(struct i40e_vsi *vsi)
 void i40e_notify_client_of_netdev_open(struct i40e_vsi *vsi)
 {
        struct i40e_client_instance *cdev;
+       int ret = 0;
 
        if (!vsi)
                return;
@@ -211,7 +212,14 @@ void i40e_notify_client_of_netdev_open(struct i40e_vsi *vsi)
                                        "Cannot locate client instance open routine\n");
                                continue;
                        }
-                       cdev->client->ops->open(&cdev->lan_info, cdev->client);
+                       if (!(test_bit(__I40E_CLIENT_INSTANCE_OPENED,
+                                      &cdev->state))) {
+                               ret = cdev->client->ops->open(&cdev->lan_info,
+                                                             cdev->client);
+                               if (!ret)
+                                       set_bit(__I40E_CLIENT_INSTANCE_OPENED,
+                                               &cdev->state);
+                       }
                }
        }
        mutex_unlock(&i40e_client_instance_mutex);
@@ -407,12 +415,14 @@ struct i40e_vsi *i40e_vsi_lookup(struct i40e_pf *pf,
  * i40e_client_add_instance - add a client instance struct to the instance list
  * @pf: pointer to the board struct
  * @client: pointer to a client struct in the client list.
+ * @existing: if there was already an existing instance
  *
- * Returns cdev ptr on success, NULL on failure
+ * Returns cdev ptr on success or if already exists, NULL on failure
  **/
 static
 struct i40e_client_instance *i40e_client_add_instance(struct i40e_pf *pf,
-                                                     struct i40e_client *client)
+                                                    struct i40e_client *client,
+                                                    bool *existing)
 {
        struct i40e_client_instance *cdev;
        struct netdev_hw_addr *mac = NULL;
@@ -421,7 +431,7 @@ struct i40e_client_instance *i40e_client_add_instance(struct i40e_pf *pf,
        mutex_lock(&i40e_client_instance_mutex);
        list_for_each_entry(cdev, &i40e_client_instances, list) {
                if ((cdev->lan_info.pf == pf) && (cdev->client == client)) {
-                       cdev = NULL;
+                       *existing = true;
                        goto out;
                }
        }
@@ -505,6 +515,7 @@ void i40e_client_subtask(struct i40e_pf *pf)
 {
        struct i40e_client_instance *cdev;
        struct i40e_client *client;
+       bool existing = false;
        int ret = 0;
 
        if (!(pf->flags & I40E_FLAG_SERVICE_CLIENT_REQUESTED))
@@ -528,18 +539,25 @@ void i40e_client_subtask(struct i40e_pf *pf)
                        /* check if L2 VSI is up, if not we are not ready */
                        if (test_bit(__I40E_DOWN, &pf->vsi[pf->lan_vsi]->state))
                                continue;
+               } else {
+                       dev_warn(&pf->pdev->dev, "This client %s is being instanciated at probe\n",
+                                client->name);
                }
 
                /* Add the client instance to the instance list */
-               cdev = i40e_client_add_instance(pf, client);
+               cdev = i40e_client_add_instance(pf, client, &existing);
                if (!cdev)
                        continue;
 
-               /* Also up the ref_cnt of no. of instances of this client */
-               atomic_inc(&client->ref_cnt);
-               dev_info(&pf->pdev->dev, "Added instance of Client %s to PF%d bus=0x%02x func=0x%02x\n",
-                        client->name, pf->hw.pf_id,
-                        pf->hw.bus.device, pf->hw.bus.func);
+               if (!existing) {
+                       /* Also up the ref_cnt for no. of instances of this
+                        * client.
+                        */
+                       atomic_inc(&client->ref_cnt);
+                       dev_info(&pf->pdev->dev, "Added instance of Client %s to PF%d bus=0x%02x func=0x%02x\n",
+                                client->name, pf->hw.pf_id,
+                                pf->hw.bus.device, pf->hw.bus.func);
+               }
 
                /* Send an Open request to the client */
                atomic_inc(&cdev->ref_cnt);
@@ -588,7 +606,8 @@ int i40e_lan_add_device(struct i40e_pf *pf)
                 pf->hw.pf_id, pf->hw.bus.device, pf->hw.bus.func);
 
        /* Since in some cases register may have happened before a device gets
-        * added, we can schedule a subtask to go initiate the clients.
+        * added, we can schedule a subtask to go initiate the clients if
+        * they can be launched at probe time.
         */
        pf->flags |= I40E_FLAG_SERVICE_CLIENT_REQUESTED;
        i40e_service_event_schedule(pf);

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index c6ac7a61812fbffed95257ec271ed19218b9549a..828ed28c3c14942429701cc9ea0f4d2e24be782f 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -5431,7 +5431,6 @@ int i40e_open(struct net_device *netdev)
        wr32(&pf->hw, I40E_GLLAN_TSOMSK_L, be32_to_cpu(TCP_FLAG_CWR) >> 16);
 
        udp_tunnel_get_rx_info(netdev);
-       i40e_notify_client_of_netdev_open(vsi);
 
        return 0;
 }