From: Mike McCormack <mikem@ring3k•org>
To: Stephen Hemminger <shemminger@vyatta•com>
Cc: netdev@vger•kernel.org
Subject: [PATCH 1/5] sky2: Avoid race in sky2_change_mtu
Date: Thu, 13 May 2010 08:16:31 +0900 [thread overview]
Message-ID: <4BEB36CF.70001@ring3k.org> (raw)
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>
---
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
reply other threads:[~2010-05-12 23:25 UTC|newest]
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