This is a note to let you know that I've just added the patch titled
net: mscc: ocelot: ANA_AUTOAGE_AGE_PERIOD holds a value in seconds, not ms
to the 5.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-mscc-ocelot-ana_autoage_age_period-holds-a-value.patch
and it can be found in the queue-5.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e62c16ec7eba96e1cc880097c473877e1bc9a3cb
Author: Vladimir Oltean <vladimir.oltean@xxxxxxx>
Date: Mon May 4 01:20:27 2020 +0300
net: mscc: ocelot: ANA_AUTOAGE_AGE_PERIOD holds a value in seconds, not ms
[ 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@xxxxxxx>
Reviewed-by: Florian Faineli <f.fainelli@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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);
