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| author | Jarek Poplawski <jarkao2@gmail.com> | 2010-01-04 08:48:41 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-01-12 02:55:24 -0800 |
| commit | 9db2f1bec36805e57a003f7bb90e003815d96de8 (patch) | |
| tree | 5293188063fdd95104fd1d4f0f0e5693ca99874a | |
| parent | aa4e2e171385bb77b4da8b760d26dea2aa291587 (diff) | |
| download | linux-3.10-9db2f1bec36805e57a003f7bb90e003815d96de8.tar.gz linux-3.10-9db2f1bec36805e57a003f7bb90e003815d96de8.tar.bz2 linux-3.10-9db2f1bec36805e57a003f7bb90e003815d96de8.zip | |
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>
| -rw-r--r-- | drivers/net/sky2.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 1c01b96c961..7650f739a81 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -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); } |