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cnic: Refine registration with bnx2.

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Register and unregister with bnx2 during NETDEV_UP and NETDEV_DOWN
events.  This simplifies the sequence of events and allows locking
fixes in the next patch.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2009-08-14 15:49:44 +00:00 committed by David S. Miller
parent 64c6460875
commit a3059b12ad
1 changed files with 37 additions and 14 deletions
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51
drivers/net/cnic.c
View file

@ -2393,6 +2393,37 @@ static int cnic_start_bnx2_hw(struct cnic_dev *dev)
return 0;
}
static int cnic_register_netdev(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
struct cnic_eth_dev *ethdev = cp->ethdev;
int err;
if (!ethdev)
return -ENODEV;
if (ethdev->drv_state & CNIC_DRV_STATE_REGD)
return 0;
err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
if (err)
printk(KERN_ERR PFX "%s: register_cnic failed\n",
dev->netdev->name);
return err;
}
static void cnic_unregister_netdev(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
struct cnic_eth_dev *ethdev = cp->ethdev;
if (!ethdev)
return;
ethdev->drv_unregister_cnic(dev->netdev);
}
static int cnic_start_hw(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
@ -2402,13 +2433,6 @@ static int cnic_start_hw(struct cnic_dev *dev)
if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
return -EALREADY;
err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
if (err) {
printk(KERN_ERR PFX "%s: register_cnic failed\n",
dev->netdev->name);
goto err2;
}
dev->regview = ethdev->io_base;
cp->chip_id = ethdev->chip_id;
pci_dev_get(dev->pcidev);
@ -2438,18 +2462,13 @@ static int cnic_start_hw(struct cnic_dev *dev)
return 0;
err1:
ethdev->drv_unregister_cnic(dev->netdev);
cp->free_resc(dev);
pci_dev_put(dev->pcidev);
err2:
return err;
}
static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
struct cnic_eth_dev *ethdev = cp->ethdev;
cnic_disable_bnx2_int_sync(dev);
cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
@ -2461,8 +2480,6 @@ static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
cnic_setup_5709_context(dev, 0);
cnic_free_irq(dev);
ethdev->drv_unregister_cnic(dev->netdev);
cnic_free_resc(dev);
}
@ -2646,6 +2663,10 @@ static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
else if (event == NETDEV_UNREGISTER)
cnic_ulp_exit(dev);
else if (event == NETDEV_UP) {
if (cnic_register_netdev(dev) != 0) {
cnic_put(dev);
goto done;
}
mutex_lock(&cnic_lock);
if (!cnic_start_hw(dev))
cnic_ulp_start(dev);
@ -2672,6 +2693,7 @@ static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
cnic_ulp_stop(dev);
cnic_stop_hw(dev);
mutex_unlock(&cnic_lock);
cnic_unregister_netdev(dev);
} else if (event == NETDEV_UNREGISTER) {
write_lock(&cnic_dev_lock);
list_del_init(&dev->list);
@ -2703,6 +2725,7 @@ static void cnic_release(void)
}
cnic_ulp_exit(dev);
cnic_unregister_netdev(dev);
list_del_init(&dev->list);
cnic_free_dev(dev);
}