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sky2: Avoid race in sky2_change_mtu

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netif_stop_queue does not ensure all in-progress transmits are complete,
 so use netif_tx_disable() instead.

Secondly, make sure NAPI polls are disabled before stopping the tx queue,
 otherwise sky2_status_intr might trigger a TX queue wakeup between when
 we stop the queue and NAPI is disabled.

Signed-off-by: Mike McCormack <mikem@ring3k.org>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mike McCormack 2010-05-13 06:12:49 +00:00 committed by David S. Miller
parent 37652522fa
commit df01093bb0
1 changed files with 1 additions and 1 deletions
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2
drivers/net/sky2.c
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@ -2275,8 +2275,8 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu)
sky2_write32(hw, B0_IMSK, 0);
dev->trans_start = jiffies; /* prevent tx timeout */
netif_stop_queue(dev);
napi_disable(&hw->napi);
netif_tx_disable(dev);
synchronize_irq(hw->pdev->irq);