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sky2: cleanup restart operations 

This unifies the places that bounce the device (suspend/resume
and restart). And makes the operations have the same semantics
as normal dev_open/dev_stop.

This also avoids setting the multicast addresses twice when
device is brought up.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2009-08-14 15:31:25 -07:00 committed by David S. Miller
parent 1972073718
commit af18d8b899
1 changed files with 48 additions and 47 deletions
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95
drivers/net/sky2.c
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@ -1500,13 +1500,12 @@ static int sky2_up(struct net_device *dev)
sky2_write32(hw, B0_IMSK, imask);
sky2_read32(hw, B0_IMSK);
sky2_set_multicast(dev);
/* wake queue incase we are restarting */
netif_wake_queue(dev);
if (netif_msg_ifup(sky2))
printk(KERN_INFO PFX "%s: enabling interface\n", dev->name);
return 0;
err_out:
@ -3087,18 +3086,46 @@ static void sky2_reset(struct sky2_hw *hw)
sky2_write8(hw, STAT_ISR_TIMER_CTRL, TIM_START);
}
/* Take device down (offline).
* Equivalent to doing dev_stop() but this does not
* inform upper layers of the transistion.
*/
static void sky2_detach(struct net_device *dev)
{
if (netif_running(dev)) {
netif_device_detach(dev); /* stop txq */
sky2_down(dev);
}
}
/* Bring device back after doing sky2_detach */
static int sky2_reattach(struct net_device *dev)
{
int err = 0;
if (netif_running(dev)) {
err = sky2_up(dev);
if (err) {
printk(KERN_INFO PFX "%s: could not restart %d\n",
dev->name, err);
dev_close(dev);
} else {
netif_device_attach(dev);
sky2_set_multicast(dev);
}
}
return err;
}
static void sky2_restart(struct work_struct *work)
{
struct sky2_hw *hw = container_of(work, struct sky2_hw, restart_work);
struct net_device *dev;
int i, err;
int i;
rtnl_lock();
for (i = 0; i < hw->ports; i++) {
dev = hw->dev[i];
if (netif_running(dev))
sky2_down(dev);
}
for (i = 0; i < hw->ports; i++)
sky2_detach(hw->dev[i]);
napi_disable(&hw->napi);
sky2_write32(hw, B0_IMSK, 0);
@ -3106,17 +3133,8 @@ static void sky2_restart(struct work_struct *work)
sky2_write32(hw, B0_IMSK, Y2_IS_BASE);
napi_enable(&hw->napi);
for (i = 0; i < hw->ports; i++) {
dev = hw->dev[i];
if (netif_running(dev)) {
err = sky2_up(dev);
if (err) {
printk(KERN_INFO PFX "%s: could not restart %d\n",
dev->name, err);
dev_close(dev);
}
}
}
for (i = 0; i < hw->ports; i++)
sky2_reattach(hw->dev[i]);
rtnl_unlock();
}
@ -3705,7 +3723,6 @@ static int sky2_set_ringparam(struct net_device *dev,
struct ethtool_ringparam *ering)
{
struct sky2_port *sky2 = netdev_priv(dev);
int err = 0;
if (ering->rx_pending > RX_MAX_PENDING ||
ering->rx_pending < 8 ||
@ -3713,19 +3730,12 @@ static int sky2_set_ringparam(struct net_device *dev,
ering->tx_pending > TX_RING_SIZE - 1)
return -EINVAL;
if (netif_running(dev))
sky2_down(dev);
sky2_detach(dev);
sky2->rx_pending = ering->rx_pending;
sky2->tx_pending = ering->tx_pending;
if (netif_running(dev)) {
err = sky2_up(dev);
if (err)
dev_close(dev);
}
return err;
return sky2_reattach(dev);
}
static int sky2_get_regs_len(struct net_device *dev)
@ -4648,9 +4658,7 @@ static int sky2_suspend(struct pci_dev *pdev, pm_message_t state)
struct net_device *dev = hw->dev[i];
struct sky2_port *sky2 = netdev_priv(dev);
netif_device_detach(dev);
if (netif_running(dev))
sky2_down(dev);
sky2_detach(dev);
if (sky2->wol)
sky2_wol_init(sky2);
@ -4698,25 +4706,18 @@ static int sky2_resume(struct pci_dev *pdev)
sky2_write32(hw, B0_IMSK, Y2_IS_BASE);
napi_enable(&hw->napi);
rtnl_lock();
for (i = 0; i < hw->ports; i++) {
struct net_device *dev = hw->dev[i];
netif_device_attach(dev);
if (netif_running(dev)) {
err = sky2_up(dev);
if (err) {
printk(KERN_ERR PFX "%s: could not up: %d\n",
dev->name, err);
rtnl_lock();
dev_close(dev);
rtnl_unlock();
goto out;
}
}
err = sky2_reattach(hw->dev[i]);
if (err)
goto out;
}
rtnl_unlock();
return 0;
out:
rtnl_unlock();
dev_err(&pdev->dev, "resume failed (%d)\n", err);
pci_disable_device(pdev);
return err;