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net_sched: red: Avoid devision by zero 

[ Upstream commit 5c47220342 ]

Do not allow delta value to be zero since it is used as a divisor.

Fixes: 8af2a218de ("sch_red: Adaptative RED AQM")
Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Nogah Frankel 2017-12-04 13:31:10 +02:00 committed by Greg Kroah-Hartman
parent 6e95c4f921
commit e428e8ce3a
1 changed files with 1 additions and 1 deletions
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2
include/net/red.h
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@ -179,7 +179,7 @@ static inline void red_set_parms(struct red_parms *p,
p->qth_max = qth_max << Wlog;
p->Wlog = Wlog;
p->Plog = Plog;
if (delta < 0)
if (delta <= 0)
delta = 1;
p->qth_delta = delta;
if (!max_P) {