diff options
| author | Jarek Poplawski <jarkao2@gmail.com> | 2010-01-04 08:48:41 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-02-09 04:50:55 -0800 |
| commit | 16813330e739634925b347804d1e6a99b71c6399 (patch) | |
| tree | ba0cfb5cf743c288a84f43130fbef180fb202341 | |
| parent | 16b8efad28d99afaf50b2a2116bf8edf605a0912 (diff) | |
sky2: Fix oops in sky2_xmit_frame() after TX timeout
[ Upstream commit 9db2f1bec36805e57a003f7bb90e003815d96de8 ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 6a10d7ba5877..f3600b3eb8c5 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -1806,7 +1806,8 @@ 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); } |