diff options
| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2010-02-19 08:13:58 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-23 12:25:01 +0300 |
| commit | 662a96bd6f020782dfbdc0d0bd177c7dbb556687 (patch) | |
| tree | 92216bd288f7a79c556832ef404f0ad03231ead6 | |
| parent | cac43a1b7b091b17113502e4128dcb0ff7e3503d (diff) | |
| download | linux-662a96bd6f020782dfbdc0d0bd177c7dbb556687.tar.xz | |
tc35815: Remove a wrong netif_wake_queue() call which triggers BUG_ON
The netif_wake_queue() is called correctly (i.e. only on !txfull
condition) from txdone routine. So Unconditional call to the
netif_wake_queue() here is wrong. This might cause calling of
start_xmit routine on txfull state and trigger BUG_ON.
This bug does not happen when NAPI disabled. After txdone there
must be at least one free tx slot. But with NAPI, this is not
true anymore and the BUG_ON can hits on heavy load.
In this driver NAPI was enabled on 2.6.33-rc1 so this is
regression from 2.6.32 kernel.
Reported-by: Ralf Roesch <ralf.roesch@rw-gmbh.de>
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/tc35815.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/net/tc35815.c b/drivers/net/tc35815.c index 75a669d48e5e..d71c1976072e 100644 --- a/drivers/net/tc35815.c +++ b/drivers/net/tc35815.c @@ -1437,7 +1437,6 @@ static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit) /* Transmit complete. */ lp->lstats.tx_ints++; tc35815_txdone(dev); - netif_wake_queue(dev); if (ret < 0) ret = 0; } |