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Date: Thu, 16 Jan 2020 12:02:33 -0500 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Vladimir Oltean <olteanv@...il.com>, Leandro Dorileo <leandro.maciel.dorileo@...el.com>, Vinicius Costa Gomes <vinicius.gomes@...el.com>, "David S . Miller" <davem@...emloft.net>, Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 4.19 515/671] net/sched: cbs: Set default link speed to 10 Mbps in cbs_set_port_rate From: Vladimir Oltean <olteanv@...il.com> [ Upstream commit 1c6c09a0ae62fa3ea8f8ead2ac3920e6fff2de64 ] The discussion to be made is absolutely the same as in the case of previous patch ("taprio: Set default link speed to 10 Mbps in taprio_set_picos_per_byte"). Nothing is lost when setting a default. Cc: Leandro Dorileo <leandro.maciel.dorileo@...el.com> Fixes: e0a7683d30e9 ("net/sched: cbs: fix port_rate miscalculation") Acked-by: Vinicius Costa Gomes <vinicius.gomes@...el.com> Signed-off-by: Vladimir Oltean <olteanv@...il.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Sasha Levin <sashal@...nel.org> --- net/sched/sch_cbs.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/net/sched/sch_cbs.c b/net/sched/sch_cbs.c index b3c8d04929df..289f66b9238d 100644 --- a/net/sched/sch_cbs.c +++ b/net/sched/sch_cbs.c @@ -185,11 +185,6 @@ static struct sk_buff *cbs_dequeue_soft(struct Qdisc *sch) s64 credits; int len; - if (atomic64_read(&q->port_rate) == -1) { - WARN_ONCE(1, "cbs: dequeue() called with unknown port rate."); - return NULL; - } - if (q->credits < 0) { credits = timediff_to_credits(now - q->last, q->idleslope); @@ -307,11 +302,19 @@ static int cbs_enable_offload(struct net_device *dev, struct cbs_sched_data *q, static void cbs_set_port_rate(struct net_device *dev, struct cbs_sched_data *q) { struct ethtool_link_ksettings ecmd; + int speed = SPEED_10; int port_rate = -1; + int err; + + err = __ethtool_get_link_ksettings(dev, &ecmd); + if (err < 0) + goto skip; + + if (ecmd.base.speed != SPEED_UNKNOWN) + speed = ecmd.base.speed; - if (!__ethtool_get_link_ksettings(dev, &ecmd) && - ecmd.base.speed != SPEED_UNKNOWN) - port_rate = ecmd.base.speed * 1000 * BYTES_PER_KBIT; +skip: + port_rate = speed * 1000 * BYTES_PER_KBIT; atomic64_set(&q->port_rate, port_rate); netdev_dbg(dev, "cbs: set %s's port_rate to: %lld, linkspeed: %d\n", -- 2.20.1
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