tree 6162ce2896e1a7139f019c09dc37f09d213a211b
parent 5e50da01d0ce7ef0ba3ed6cfabd62f327da0aca6
author Patrick McHardy <kaber@trash.net> 1164850603 -0800
committer David S. Miller <davem@sunset.davemloft.net> 1165123904 -0800

[NET_SCHED]: Fix endless loops (part 3): HFSC

Convert HFSC to use qdisc_tree_decrease_len() and add a callback
for deactivating a class when its child queue becomes empty.

All queue purging goes through hfsc_purge_queue(), which is used in
three cases: grafting, class creation (when a leaf class is turned
into an intermediate class by attaching a new class) and class
deletion. In all cases qdisc_tree_decrease_len() is needed.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>