tree fd61f42ecad239577edf680efe3f93ac95b70a26
parent 48683d72f8146dfb896e05c90d3544bbad63778c
author Michael Ellerman <michael@ellerman.id.au> 1125538157 +1000
committer Jeff Garzik <jgarzik@pobox.com> 1125542565 -0400

[PATCH] iseries_veth: Add a per-connection ack timer

Currently the iseries_veth driver contravenes the specification in
Documentation/networking/driver.txt, in that if packets are not acked by
the other LPAR they will sit around forever.

This patch adds a per-connection timer which fires if we've had no acks for
five seconds. This is superior to the generic TX timer because it catches
the case of a small number of packets being sent and never acked.

This fixes a bug we were seeing on real systems, where some IPv6 neighbour
discovery packets would not be acked and then prevent the module from being
removed, due to skbs lying around.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>