ehea: fix for dlpar support

Certain resources may only be allocated when first logical port is available,
and must be removed when last logical port has been removed.

Signed-off-by: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 45 insertions, 22 deletions

diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index 368f8e3eb4a0..c7a5614e66c0 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -2133,6 +2133,28 @@ static int ehea_clean_all_portres(struct ehea_port *port)
         return ret;
 }
 
+static void ehea_remove_adapter_mr (struct ehea_adapter *adapter)
+{
+        int i;
+
+        for (i=0; i < EHEA_MAX_PORTS; i++)
+                if (adapter->port[i])
+                        return;
+
+        ehea_rem_mr(&adapter->mr);
+}
+
+static int ehea_add_adapter_mr (struct ehea_adapter *adapter)
+{
+        int i;
+
+        for (i=0; i < EHEA_MAX_PORTS; i++)
+                if (adapter->port[i])
+                        return 0;
+
+        return ehea_reg_kernel_mr(adapter, &adapter->mr);
+}
+
 static int ehea_up(struct net_device *dev)
 {
         int ret, i;
@@ -2583,7 +2605,6 @@ static int ehea_setup_ports(struct ehea_adapter *adapter)
         struct device_node *eth_dn = NULL;
 
         u32 *dn_log_port_id;
-        int port_setup_ok = 0;
         int i = 0;
 
         lhea_dn = adapter->ebus_dev->ofdev.node;
@@ -2597,6 +2618,12 @@ static int ehea_setup_ports(struct ehea_adapter *adapter)
                         continue;
                 }
 
+                if (ehea_add_adapter_mr(adapter)) {
+                        ehea_error("creating MR failed");
+                        of_node_put(eth_dn);
+                        return -EIO;
+                }
+
                 adapter->port[i] = ehea_setup_single_port(adapter,
                                                           *dn_log_port_id,
                                                           eth_dn);
@@ -2604,18 +2631,13 @@ static int ehea_setup_ports(struct ehea_adapter *adapter)
                         ehea_info("%s -> logical port id #%d",
                                   adapter->port[i]->netdev->name,
                                   *dn_log_port_id);
+                else
+                        ehea_remove_adapter_mr(adapter);
+
                 i++;
         };
 
-        /* Check for succesfully set up ports */
-        for (i = 0; i < EHEA_MAX_PORTS; i++)
-                if (adapter->port[i])
-                        port_setup_ok++;
-
-        if (port_setup_ok)
-                return 0;       /* At least some ports are setup correctly */
-
-        return -EINVAL;
+        return 0;
 }
 
 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
@@ -2667,6 +2689,11 @@ static ssize_t ehea_probe_port(struct device *dev,
                 return -EINVAL;
         }
 
+        if (ehea_add_adapter_mr(adapter)) {
+                ehea_error("creating MR failed");
+                return -EIO;
+        }
+
         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
 
         of_node_put(eth_dn);
@@ -2680,8 +2707,10 @@ static ssize_t ehea_probe_port(struct device *dev,
 
                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
                           logical_port_id);
-        } else
+        } else {
+                ehea_remove_adapter_mr(adapter);
                 return -EIO;
+        }
 
         return (ssize_t) count;
 }
@@ -2716,6 +2745,8 @@ static ssize_t ehea_remove_port(struct device *dev,
                 return -EINVAL;
         }
 
+        ehea_remove_adapter_mr(adapter);
+
         return (ssize_t) count;
 }
 
@@ -2776,18 +2807,13 @@ static int __devinit ehea_probe_adapter(struct ibmebus_dev *dev,
 
         dev->ofdev.dev.driver_data = adapter;
 
-        ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
-        if (ret) {
-                dev_err(&dev->ofdev.dev, "reg_mr_adapter failed\n");
-                goto out_free_ad;
-        }
 
         /* initialize adapter and ports */
         /* get adapter properties */
         ret = ehea_sense_adapter_attr(adapter);
         if (ret) {
                 dev_err(&dev->ofdev.dev, "sense_adapter_attr failed: %d", ret);
-                goto out_free_res;
+                goto out_free_ad;
         }
 
         adapter->neq = ehea_create_eq(adapter,
@@ -2795,7 +2821,7 @@ static int __devinit ehea_probe_adapter(struct ibmebus_dev *dev,
         if (!adapter->neq) {
                 ret = -EIO;
                 dev_err(&dev->ofdev.dev, "NEQ creation failed");
-                goto out_free_res;
+                goto out_free_ad;
         }
 
         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
@@ -2840,9 +2866,6 @@ out_free_irq:
 out_kill_eq:
         ehea_destroy_eq(adapter->neq);
 
-out_free_res:
-        ehea_rem_mr(&adapter->mr);
-
 out_free_ad:
         kfree(adapter);
 out:
@@ -2868,7 +2891,7 @@ static int __devexit ehea_remove(struct ibmebus_dev *dev)
         tasklet_kill(&adapter->neq_tasklet);
 
         ehea_destroy_eq(adapter->neq);
-        ehea_rem_mr(&adapter->mr);
+        ehea_remove_adapter_mr(adapter);
         kfree(adapter);
         return 0;
 }