Commit 9db2f1be authored Jan 04, 2010 by Jarek Poplawski Committed by David S. Miller Jan 12, 2010

sky2: Fix oops in sky2_xmit_frame() after TX timeout

During TX timeout procedure dev could be awoken too early, e.g. by
sky2_complete_tx() called from sky2_down(). Then sky2_xmit_frame()
can run while buffers are freed causing an oops. This patch fixes it
by adding netif_device_present() test in sky2_tx_complete().

Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=14925



With debugging by: Mike McCormack <mikem@ring3k.org>

Reported-by: Berck E. Nash <flyboy@gmail.com>
Tested-by: Berck E. Nash <flyboy@gmail.com>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent aa4e2e17

drivers/net/sky2.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1844,7 +1844,8 @@ static void sky2_tx_complete(struct sky2_port *sky2, u16 done)
		sky2->tx_cons = idx;
		smp_mb();

		if (tx_avail(sky2) > MAX_SKB_TX_LE + 4)
		/* Wake unless it's detached, and called e.g. from sky2_down() */
		if (tx_avail(sky2) > MAX_SKB_TX_LE + 4 && netif_device_present(dev))
		netif_wake_queue(dev);
		}

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