From af18d8b89930aecc742982634adaf97dfb43ed3b Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Fri, 14 Aug 2009 15:31:25 -0700 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/sky2.c | 95 +++++++++++++++++++++++----------------------- 1 file changed, 48 insertions(+), 47 deletions(-) diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 3ae4b42fe4d7..301f8a6f8c08 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -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; -- 2.20.1