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| author |   Michael Ellerman <michael@ellerman.id.au> | 2005-06-09 12:36:33 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-09 15:39:52 -0700 |
| commit | 243cd55e021baf28babdd88112ac03ae5cd4bb9c (patch) | |
| tree | f1bf0f1f17ed03f92f0bbce12b3f958dde028906 /drivers | |
| parent | [PATCH] ppc32: add 405EP cpu_spec entry (diff) | |
| download | linux-dev-243cd55e021baf28babdd88112ac03ae5cd4bb9c.tar.xz linux-dev-243cd55e021baf28babdd88112ac03ae5cd4bb9c.zip | |
[PATCH] iseries_veth: Supress spurious WARN_ON() at module unload
My patch from a few weeks back (now in mainline), called "Cleanup skbs to
prevent unregister_netdevice() hanging", can cause our TX timeout code to
fire on machines with lots of VLANs (because it takes > 2 seconds between
when we stop the queues and when we're finished stopping the connections).
When that happens the TX timeout code freaks out and does a WARN_ON()
because as far as it's concerned there shouldn't be a TX timeout happening,
which is fair enough.
I have a "proper" fix for this, which is to a) do refcounting on
connections and b) implement a proper ack timer so we don't keep unacked
skbs lying around for ever. But for 2.6.12 I propose just supressing the
WARN_ON(). Users will still see the "NETDEV WATCHDOG" warning, but that's
not nearly as bad as a WARN_ON() which users interpret as an Oops.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/iseries_veth.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/net/iseries_veth.c b/drivers/net/iseries_veth.c index 13ed8dc1e91d..55af32e9bf08 100644 --- a/drivers/net/iseries_veth.c +++ b/drivers/net/iseries_veth.c @@ -802,13 +802,14 @@ static void veth_tx_timeout(struct net_device *dev) spin_lock_irqsave(&port->pending_gate, flags); + if (!port->pending_lpmask) { + spin_unlock_irqrestore(&port->pending_gate, flags); + return; + } + printk(KERN_WARNING "%s: Tx timeout! Resetting lp connections: %08x\n", dev->name, port->pending_lpmask); - /* If we've timed out the queue must be stopped, which should - * only ever happen when there is a pending packet. */ - WARN_ON(! port->pending_lpmask); - for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { struct veth_lpar_connection *cnx = veth_cnx[i]; |