tree a1c0465f681b7aae24d0ade106f68593e74a8346
parent 41664c03f6c96a1f8a91714309b36f1b5ca85610
author Michael Ellerman <michael@ellerman.id.au> 1115885385 +1000
committer Jeff Garzik <jgarzik@pobox.com> 1116194886 -0400

[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>