linux-kernel - [PATCH net-next 09/17] net: dsa: b53: Let DSA handle mismatched VLAN filtering settings

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Message-Id: <20190331174232.22060-10-olteanv@gmail.com>
Date:   Sun, 31 Mar 2019 20:42:24 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     f.fainelli@...il.com, vivien.didelot@...il.com, andrew@...n.ch,
        davem@...emloft.net
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linus.walleij@...aro.org, georg.waibel@...sor-technik.de,
        Vladimir Oltean <olteanv@...il.com>
Subject: [PATCH net-next 09/17] net: dsa: b53: Let DSA handle mismatched VLAN filtering settings

The DSA core is now able to do this check prior to calling the
.port_vlan_filtering callback, so tell it that VLAN filtering is global
for this particular hardware.

Signed-off-by: Vladimir Oltean <olteanv@...il.com>
Suggested-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/net/dsa/b53/b53_common.c | 25 +++++++------------------
 1 file changed, 7 insertions(+), 18 deletions(-)

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 0852e5e08177..a779b9c3ab6e 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -966,6 +966,13 @@ static int b53_setup(struct dsa_switch *ds)
 			b53_disable_port(ds, port);
 	}
 
+	/* Let DSA handle the case were multiple bridges span the same switch
+	 * device and different VLAN awareness settings are requested, which
+	 * would be breaking filtering semantics for any of the other bridge
+	 * devices. (not hardware supported)
+	 */
+	ds->vlan_filtering_is_global = true;
+
 	return ret;
 }
 
@@ -1275,26 +1282,8 @@ EXPORT_SYMBOL(b53_phylink_mac_link_up);
 int b53_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering)
 {
 	struct b53_device *dev = ds->priv;
-	struct net_device *bridge_dev;
-	unsigned int i;
 	u16 pvid, new_pvid;
 
-	/* Handle the case were multiple bridges span the same switch device
-	 * and one of them has a different setting than what is being requested
-	 * which would be breaking filtering semantics for any of the other
-	 * bridge devices.
-	 */
-	b53_for_each_port(dev, i) {
-		bridge_dev = dsa_to_port(ds, i)->bridge_dev;
-		if (bridge_dev &&
-		    bridge_dev != dsa_to_port(ds, port)->bridge_dev &&
-		    br_vlan_enabled(bridge_dev) != vlan_filtering) {
-			netdev_err(bridge_dev,
-				   "VLAN filtering is global to the switch!\n");
-			return -EINVAL;
-		}
-	}
-
 	b53_read16(dev, B53_VLAN_PAGE, B53_VLAN_PORT_DEF_TAG(port), &pvid);
 	new_pvid = pvid;
 	if (dev->vlan_filtering_enabled && !vlan_filtering) {
-- 
2.17.1