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>

1 files changed, 4 insertions, 22 deletions

diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index b70c5314f537..c765ec609462 100644
--- 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;
 }