David S. Miller 5fb662297b pkt_sched: Use qdisc_lock() on already sampled root qdisc. ...

Based upon a bug report by Jeff Kirsher.

Don't use qdisc_root_lock() in these cases as the root
qdisc could have been changed, and we'd thus lock the
wrong object.

Tested by Emil S Tantilov who confirms that this seems
to fix the problem.

Signed-off-by: David S. Miller <davem@davemloft.net>

2008-08-02 20:02:43 -07:00

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