net: mscc: ocelot: ANA_AUTOAGE_AGE_PERIOD holds a value in seconds, not ms

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@nxp.com>
Reviewed-by: Florian Faineli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 887b3cc..02350c3 100644 (file)
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -1451,8 +1451,15 @@ 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);