ibmvnic: Move ibmvnic adapter intialization to its own routine

The intialization of the ibmvnic driver with respect to the virtual
server it connects to should be moved to its own routine. This will
alolow the driver to initiate this process from places outside of
the drivers probe routine.
Signed-off-by: NNathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/ibm/ibmvnic.c

@@ -3783,14 +3783,65 @@ static void handle_crq_init_rsp(struct work_struct *work)
 	dev_err(dev, "Passive initialization was not successful\n");
 }
 
-static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
+static int ibmvnic_init(struct ibmvnic_adapter *adapter)
 {
+	struct device *dev = &adapter->vdev->dev;
 	unsigned long timeout = msecs_to_jiffies(30000);
+	struct dentry *ent;
+	char buf[17]; /* debugfs name buf */
+	int rc;
+
+	rc = ibmvnic_init_crq_queue(adapter);
+	if (rc) {
+		dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
+		return rc;
+	}
+
+	adapter->stats_token = dma_map_single(dev, &adapter->stats,
+				      sizeof(struct ibmvnic_statistics),
+				      DMA_FROM_DEVICE);
+	if (dma_mapping_error(dev, adapter->stats_token)) {
+		ibmvnic_release_crq_queue(adapter);
+		dev_err(dev, "Couldn't map stats buffer\n");
+		return -ENOMEM;
+	}
+
+	snprintf(buf, sizeof(buf), "ibmvnic_%x", adapter->vdev->unit_address);
+	ent = debugfs_create_dir(buf, NULL);
+	if (!ent || IS_ERR(ent)) {
+		dev_info(dev, "debugfs create directory failed\n");
+		adapter->debugfs_dir = NULL;
+	} else {
+		adapter->debugfs_dir = ent;
+		ent = debugfs_create_file("dump", S_IRUGO,
+					  adapter->debugfs_dir,
+					  adapter->netdev, &ibmvnic_dump_ops);
+		if (!ent || IS_ERR(ent)) {
+			dev_info(dev, "debugfs create dump file failed\n");
+			adapter->debugfs_dump = NULL;
+		} else {
+			adapter->debugfs_dump = ent;
+		}
+	}
+
+	init_completion(&adapter->init_done);
+	ibmvnic_send_crq_init(adapter);
+	if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
+		dev_err(dev, "Initialization sequence timed out\n");
+		if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
+			debugfs_remove_recursive(adapter->debugfs_dir);
+		ibmvnic_release_crq_queue(adapter);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
+{
 	struct ibmvnic_adapter *adapter;
 	struct net_device *netdev;
 	unsigned char *mac_addr_p;
-	struct dentry *ent;
-	char buf[17]; /* debugfs name buf */
 	int rc;
 
 	dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
@@ -3828,69 +3879,28 @@ static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
 
 	spin_lock_init(&adapter->stats_lock);
 
-	rc = ibmvnic_init_crq_queue(adapter);
-	if (rc) {
-		dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
-		goto free_netdev;
-	}
-
 	INIT_LIST_HEAD(&adapter->errors);
 	INIT_LIST_HEAD(&adapter->inflight);
 	spin_lock_init(&adapter->error_list_lock);
 	spin_lock_init(&adapter->inflight_lock);
 
-	adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
-					      sizeof(struct ibmvnic_statistics),
-					      DMA_FROM_DEVICE);
-	if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
-		if (!firmware_has_feature(FW_FEATURE_CMO))
-			dev_err(&dev->dev, "Couldn't map stats buffer\n");
-		rc = -ENOMEM;
-		goto free_crq;
-	}
-
-	snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
-	ent = debugfs_create_dir(buf, NULL);
-	if (!ent || IS_ERR(ent)) {
-		dev_info(&dev->dev, "debugfs create directory failed\n");
-		adapter->debugfs_dir = NULL;
-	} else {
-		adapter->debugfs_dir = ent;
-		ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
-					  netdev, &ibmvnic_dump_ops);
-		if (!ent || IS_ERR(ent)) {
-			dev_info(&dev->dev,
-				 "debugfs create dump file failed\n");
-			adapter->debugfs_dump = NULL;
-		} else {
-			adapter->debugfs_dump = ent;
-		}
+	rc = ibmvnic_init(adapter);
+	if (rc) {
+		free_netdev(netdev);
+		return rc;
 	}
 
-	init_completion(&adapter->init_done);
-	ibmvnic_send_crq_init(adapter);
-	if (!wait_for_completion_timeout(&adapter->init_done, timeout))
-		return 0;
-
 	netdev->mtu = adapter->req_mtu - ETH_HLEN;
 
 	rc = register_netdev(netdev);
 	if (rc) {
 		dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
-		goto free_debugfs;
+		free_netdev(netdev);
+		return rc;
 	}
 	dev_info(&dev->dev, "ibmvnic registered\n");
 
 	return 0;
-
-free_debugfs:
-	if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
-		debugfs_remove_recursive(adapter->debugfs_dir);
-free_crq:
-	ibmvnic_release_crq_queue(adapter);
-free_netdev:
-	free_netdev(netdev);
-	return rc;
 }
 
 static int ibmvnic_remove(struct vio_dev *dev)