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Date: Sun, 10 May 2020 19:42:47 +0300 From: Vladimir Oltean <olteanv@...il.com> To: andrew@...n.ch, f.fainelli@...il.com, vivien.didelot@...il.com Cc: davem@...emloft.net, kuba@...nel.org, rmk+kernel@...linux.org.uk, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH net-next 07/15] net: dsa: sja1105: exit sja1105_vlan_filtering when called multiple times From: Vladimir Oltean <vladimir.oltean@....com> VLAN filtering is a global property for sja1105, and that means that we rely on the DSA core to not call us more than once. But we need to introduce some per-port state for the tagger, namely the xmit_tpid, and the best place to do that is where the xmit_tpid changes, namely in sja1105_vlan_filtering. So at the moment, exit early from the function to avoid unnecessarily resetting the switch for each port call. Then we'll change the xmit_tpid prior to the early exit in the next patch. Signed-off-by: Vladimir Oltean <vladimir.oltean@....com> --- drivers/net/dsa/sja1105/sja1105_main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c index 15db37067bf1..8cf17238bc6a 100644 --- a/drivers/net/dsa/sja1105/sja1105_main.c +++ b/drivers/net/dsa/sja1105/sja1105_main.c @@ -2141,6 +2141,9 @@ static int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled) else state = SJA1105_VLAN_FILTERING_FULL; + if (priv->vlan_state == state) + return 0; + priv->vlan_state = state; table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS]; -- 2.17.1
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