From: Mike McCormack Date: Wed, 22 Jul 2009 03:57:56 +0000 (-0700) Subject: sky2: Avoid races in sky2_down X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a947a39d52f5b647a2fd5eca55d39e722a2fa90f;p=linux-beck.git sky2: Avoid races in sky2_down Reset rx chain before trying to drain it. Shut interrupts off last, incase there's something to report. Signed-off-by: Mike McCormack Acked-by: Stephen Hemminger Signed-off-by: David S. Miller --- diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index ba768dfa59e0..3550c5dcd93c 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -1818,12 +1818,6 @@ static int sky2_down(struct net_device *dev) if (netif_msg_ifdown(sky2)) printk(KERN_INFO PFX "%s: disabling interface\n", dev->name); - /* Disable port IRQ */ - imask = sky2_read32(hw, B0_IMSK); - imask &= ~portirq_msk[port]; - sky2_write32(hw, B0_IMSK, imask); - sky2_read32(hw, B0_IMSK); - /* Force flow control off */ sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF); @@ -1863,8 +1857,6 @@ static int sky2_down(struct net_device *dev) sky2_write32(hw, RB_ADDR(txqaddr[port], RB_CTRL), RB_RST_SET); - sky2_rx_stop(sky2); - sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_SET); sky2_write8(hw, SK_REG(port, TX_GMF_CTRL_T), GMF_RST_SET); @@ -1874,6 +1866,14 @@ static int sky2_down(struct net_device *dev) sky2_write32(hw, STAT_ISR_TIMER_CNT, 0); sky2_read8(hw, STAT_ISR_TIMER_CTRL); + sky2_rx_stop(sky2); + + /* Disable port IRQ */ + imask = sky2_read32(hw, B0_IMSK); + imask &= ~portirq_msk[port]; + sky2_write32(hw, B0_IMSK, imask); + sky2_read32(hw, B0_IMSK); + synchronize_irq(hw->pdev->irq); napi_synchronize(&hw->napi);