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 <mikem@ring3k.org>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index ba768dfa59e050043302eb7d1cb30dff45ce3975..3550c5dcd93c599ed2e91f4424821c87523c76fb 100644 (file)
--- 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);