ehea: fix mutex and spinlock use

  Looks like to me that the ehea_fw_handles.lock mutex and the
ehea_bcmc_regs.lock spinlock are taken much longer than necessary and could
as well be pushed inside the functions that need them
(ehea_update_firmware_handles() and ehea_update_bcmc_registrations())
rather than at each callsite.

Signed-off-by: Sebastien Dugue <sebastien.dugue@bull.net>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index b70c531..c765ec6 100644 (file)
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -219,9 +219,11 @@ static void ehea_update_firmware_handles(void)
        }
 
 out_update:
+       mutex_lock(&ehea_fw_handles.lock);
        kfree(ehea_fw_handles.arr);
        ehea_fw_handles.arr = arr;
        ehea_fw_handles.num_entries = i;
+       mutex_unlock(&ehea_fw_handles.lock);
 }
 
 static void ehea_update_bcmc_registrations(void)
@@ -293,9 +295,11 @@ static void ehea_update_bcmc_registrations(void)
        }
 
 out_update:
+       spin_lock(&ehea_bcmc_regs.lock);
        kfree(ehea_bcmc_regs.arr);
        ehea_bcmc_regs.arr = arr;
        ehea_bcmc_regs.num_entries = i;
+       spin_unlock(&ehea_bcmc_regs.lock);
 }
 
 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
@@ -1770,8 +1774,6 @@ static int ehea_set_mac_addr(struct net_device *dev, void *sa)
 
        memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
 
-       spin_lock(&ehea_bcmc_regs.lock);
-
        /* Deregister old MAC in pHYP */
        if (port->state == EHEA_PORT_UP) {
                ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
@@ -1792,7 +1794,6 @@ static int ehea_set_mac_addr(struct net_device *dev, void *sa)
 
 out_upregs:
        ehea_update_bcmc_registrations();
-       spin_unlock(&ehea_bcmc_regs.lock);
 out_free:
        kfree(cb0);
 out:
@@ -1954,8 +1955,6 @@ static void ehea_set_multicast_list(struct net_device *dev)
        }
        ehea_promiscuous(dev, 0);
 
-       spin_lock(&ehea_bcmc_regs.lock);
-
        if (dev->flags & IFF_ALLMULTI) {
                ehea_allmulti(dev, 1);
                goto out;
@@ -1985,7 +1984,6 @@ static void ehea_set_multicast_list(struct net_device *dev)
        }
 out:
        ehea_update_bcmc_registrations();
-       spin_unlock(&ehea_bcmc_regs.lock);
        return;
 }
 
@@ -2466,8 +2464,6 @@ static int ehea_up(struct net_device *dev)
        if (port->state == EHEA_PORT_UP)
                return 0;
 
-       mutex_lock(&ehea_fw_handles.lock);
-
        ret = ehea_port_res_setup(port, port->num_def_qps,
                                  port->num_add_tx_qps);
        if (ret) {
@@ -2504,8 +2500,6 @@ static int ehea_up(struct net_device *dev)
                }
        }
 
-       spin_lock(&ehea_bcmc_regs.lock);
-
        ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
        if (ret) {
                ret = -EIO;
@@ -2527,10 +2521,8 @@ out:
                ehea_info("Failed starting %s. ret=%i", dev->name, ret);
 
        ehea_update_bcmc_registrations();
-       spin_unlock(&ehea_bcmc_regs.lock);
 
        ehea_update_firmware_handles();
-       mutex_unlock(&ehea_fw_handles.lock);
 
        return ret;
 }
@@ -2580,9 +2572,6 @@ static int ehea_down(struct net_device *dev)
        if (port->state == EHEA_PORT_DOWN)
                return 0;
 
-       mutex_lock(&ehea_fw_handles.lock);
-
-       spin_lock(&ehea_bcmc_regs.lock);
        ehea_drop_multicast_list(dev);
        ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
 
@@ -2591,7 +2580,6 @@ static int ehea_down(struct net_device *dev)
        port->state = EHEA_PORT_DOWN;
 
        ehea_update_bcmc_registrations();
-       spin_unlock(&ehea_bcmc_regs.lock);
 
        ret = ehea_clean_all_portres(port);
        if (ret)
@@ -2599,7 +2587,6 @@ static int ehea_down(struct net_device *dev)
                          dev->name, ret);
 
        ehea_update_firmware_handles();
-       mutex_unlock(&ehea_fw_handles.lock);
 
        return ret;
 }
@@ -3378,7 +3365,6 @@ static int __devinit ehea_probe_adapter(struct of_device *dev,
                ehea_error("Invalid ibmebus device probed");
                return -EINVAL;
        }
-       mutex_lock(&ehea_fw_handles.lock);
 
        adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
        if (!adapter) {
@@ -3462,7 +3448,6 @@ out_free_ad:
 
 out:
        ehea_update_firmware_handles();
-       mutex_unlock(&ehea_fw_handles.lock);
        return ret;
 }
 
@@ -3481,8 +3466,6 @@ static int __devexit ehea_remove(struct of_device *dev)
 
        flush_scheduled_work();
 
-       mutex_lock(&ehea_fw_handles.lock);
-
        ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
        tasklet_kill(&adapter->neq_tasklet);
 
@@ -3492,7 +3475,6 @@ static int __devexit ehea_remove(struct of_device *dev)
        kfree(adapter);
 
        ehea_update_firmware_handles();
-       mutex_unlock(&ehea_fw_handles.lock);
 
        return 0;
 }