netdev - [PATCH] sky2: Avoid race in sky2_change

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Message-ID: <4BDEDB50.7000707@ring3k.org>
Date:	Mon, 03 May 2010 23:18:56 +0900
From:	Mike McCormack <mikem@...g3k.org>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	netdev@...r.kernel.org
Subject: [PATCH] sky2: Avoid race in sky2_change_mtu

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

Make sure NAPI polls are disabled, otherwise NAPI might trigger a TX
 restart between when we stop the queue and NAPI is disabled.

Signed-off-by: Mike McCormack <mikem@...g3k.org>
---
 drivers/net/sky2.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 088c797..b839bae 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -2236,8 +2236,8 @@ 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);
 
-- 
1.5.6.5

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