luck/tmp_suning_uos_patched
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ehea: fix mutex and spinlock use

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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>
This commit is contained in:
Sebastien Dugue 2008-09-11 15:34:40 +02:00 committed by Jeff Garzik
parent d100ba33f8
commit 2eefbd63d0
1 changed files with 4 additions and 22 deletions
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26
drivers/net/ehea/ehea_main.c
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@ -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 @@ static int ehea_up(struct net_device *dev)
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 @@ static int __devinit ehea_probe_adapter(struct of_device *dev,
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;
}