From 018d1c667ef4dce5299dd79d38447840789c97d6 Mon Sep 17 00:00:00 2001 From: "shemminger@osdl.org" Date: Wed, 30 Nov 2005 11:45:18 -0800 Subject: [PATCH] sky2: race with MTU change Avoid possible race conditions when doing MTU and change and shutdown. Signed-off-by: Stephen Hemminger Signed-off-by: Jeff Garzik --- drivers/net/sky2.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index f56de9894208..1d5c3039f53a 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -1298,8 +1298,16 @@ static int sky2_down(struct net_device *dev) if (netif_msg_ifdown(sky2)) printk(KERN_INFO PFX "%s: disabling interface\n", dev->name); + /* Stop more packets from being queued */ netif_stop_queue(dev); + /* Disable port IRQ */ + local_irq_disable(); + hw->intr_mask &= ~((sky2->port == 0) ? Y2_IS_IRQ_PHY1 : Y2_IS_IRQ_PHY2); + sky2_write32(hw, B0_IMSK, hw->intr_mask); + local_irq_enable(); + + sky2_phy_reset(hw, port); /* Stop transmitter */ @@ -1346,6 +1354,8 @@ static int sky2_down(struct net_device *dev) /* turn off LED's */ sky2_write16(hw, B0_Y2LED, LED_STAT_OFF); + synchronize_irq(hw->pdev->irq); + sky2_tx_clean(sky2); sky2_rx_clean(sky2); @@ -1586,9 +1596,12 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu) return 0; } - local_irq_disable(); sky2_write32(hw, B0_IMSK, 0); + dev->trans_start = jiffies; /* prevent tx timeout */ + netif_stop_queue(dev); + netif_poll_disable(hw->dev[0]); + ctl = gma_read16(hw, sky2->port, GM_GP_CTRL); gma_write16(hw, sky2->port, GM_GP_CTRL, ctl & ~GM_GPCR_RX_ENA); sky2_rx_stop(sky2); @@ -1608,9 +1621,10 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu) err = sky2_rx_start(sky2); gma_write16(hw, sky2->port, GM_GP_CTRL, ctl); + netif_poll_disable(hw->dev[0]); + netif_wake_queue(dev); sky2_write32(hw, B0_IMSK, hw->intr_mask); - sky2_read32(hw, B0_IMSK); - local_irq_enable(); + return err; } -- cgit v1.2.3