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Date: Thu, 14 May 2020 14:51:35 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Vladimir Oltean <vladimir.oltean@....com>, Florian Faineli <f.fainelli@...il.com>, "David S . Miller" <davem@...emloft.net>, Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 5.6 50/62] net: mscc: ocelot: ANA_AUTOAGE_AGE_PERIOD holds a value in seconds, not ms From: Vladimir Oltean <vladimir.oltean@....com> [ Upstream commit c0d7eccbc76115b7eb337956c03d47d6a889cf8c ] One may notice that automatically-learnt entries 'never' expire, even though the bridge configures the address age period at 300 seconds. Actually the value written to hardware corresponds to a time interval 1000 times higher than intended, i.e. 83 hours. Fixes: a556c76adc05 ("net: mscc: Add initial Ocelot switch support") Signed-off-by: Vladimir Oltean <vladimir.oltean@....com> Reviewed-by: Florian Faineli <f.fainelli@...il.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/net/ethernet/mscc/ocelot.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c index 33ef8690eafe9..419e2ce2eac07 100644 --- a/drivers/net/ethernet/mscc/ocelot.c +++ b/drivers/net/ethernet/mscc/ocelot.c @@ -1444,8 +1444,15 @@ static void ocelot_port_attr_stp_state_set(struct ocelot *ocelot, int port, void ocelot_set_ageing_time(struct ocelot *ocelot, unsigned int msecs) { - ocelot_write(ocelot, ANA_AUTOAGE_AGE_PERIOD(msecs / 2), - ANA_AUTOAGE); + unsigned int age_period = ANA_AUTOAGE_AGE_PERIOD(msecs / 2000); + + /* Setting AGE_PERIOD to zero effectively disables automatic aging, + * which is clearly not what our intention is. So avoid that. + */ + if (!age_period) + age_period = 1; + + ocelot_rmw(ocelot, age_period, ANA_AUTOAGE_AGE_PERIOD_M, ANA_AUTOAGE); } EXPORT_SYMBOL(ocelot_set_ageing_time); -- 2.20.1
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