diff options
| author | Michael Ellerman <michael@ellerman.id.au> | 2005-05-12 18:09:45 +1000 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-05-15 18:08:06 -0400 |
| commit | b2e0852e1eee7c445b1789bef41204b64f981102 (patch) | |
| tree | a1c0465f681b7aae24d0ade106f68593e74a8346 /drivers/net/iseries_veth.c | |
| parent | 41664c03f6c96a1f8a91714309b36f1b5ca85610 (diff) | |
[PATCH] iseries_veth: Cleanup skbs to prevent unregister_netdevice() hanging
Hi Andrew, Jeff,
The iseries_veth driver is badly behaved in that it will keep TX packets
hanging around forever if they're not ACK'ed and the queue never fills up.
This causes the unregister_netdevice code to wait forever when we try to take
the device down, because there's still skbs around with references to our
struct net_device.
There's already code to cleanup any un-ACK'ed packets in veth_stop_connection()
but it's being called after we unregister the net_device, which is too late.
The fix is to rearrange the module exit function so that we cleanup any
outstanding skbs and then unregister the driver.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Diffstat (limited to 'drivers/net/iseries_veth.c')
| -rw-r--r-- | drivers/net/iseries_veth.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/net/iseries_veth.c b/drivers/net/iseries_veth.c index 1edecb10993d..13ed8dc1e91d 100644 --- a/drivers/net/iseries_veth.c +++ b/drivers/net/iseries_veth.c @@ -1388,18 +1388,25 @@ void __exit veth_module_cleanup(void) { int i; - vio_unregister_driver(&veth_driver); + /* Stop the queues first to stop any new packets being sent. */ + for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) + if (veth_dev[i]) + netif_stop_queue(veth_dev[i]); + /* Stop the connections before we unregister the driver. This + * ensures there's no skbs lying around holding the device open. */ for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) veth_stop_connection(i); HvLpEvent_unregisterHandler(HvLpEvent_Type_VirtualLan); /* Hypervisor callbacks may have scheduled more work while we - * were destroying connections. Now that we've disconnected from + * were stoping connections. Now that we've disconnected from * the hypervisor make sure everything's finished. */ flush_scheduled_work(); + vio_unregister_driver(&veth_driver); + for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) veth_destroy_connection(i); |