tree eddf99fddfdb6979c422c427a60a164135e0fc20
parent cdc7f8e362bcadbc312c97fb69d8d59676eec422
author Patrick McHardy <kaber@trash.net> 1142910081 -0800
committer David S. Miller <davem@davemloft.net> 1142910081 -0800

[PKT_SCHED]: Restore TBF change semantic

When TBF was converted to a classful qdisc, the semantic of the limit
parameter was broken. On initilization an inner bfifo qdisc is created
for backwards compatibility, when changing parameters however the new
limit is ignored and the current child qdisc remains in place.

Always replace the child qdisc by the default bfifo when limit is above
zero, otherwise don't touch the inner qdisc. Current tc version enforce
a limit above zero, other users can avoid creating the inner qdisc by
using zero.

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