netdev - [PATCH net-next 4/9] staging: fsl-dpaa2: ethsw: Check bridge port flags during prepare

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Date:   Wed, 13 Feb 2019 14:06:33 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     netdev@...r.kernel.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Ido Schimmel <idosch@...lanox.com>,
        linux-kernel@...r.kernel.org (open list),
        devel@...verdev.osuosl.org (open list:STAGING SUBSYSTEM),
        bridge@...ts.linux-foundation.org (moderated list:ETHERNET BRIDGE),
        jiri@...lanox.com, andrew@...n.ch, vivien.didelot@...il.com
Subject: [PATCH net-next 4/9] staging: fsl-dpaa2: ethsw: Check bridge port flags during prepare

In preparation for removing SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT,
have ethsw check that the bridge port flags that are being set are
supported when SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS is specified.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/staging/fsl-dpaa2/ethsw/ethsw.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
index 1b3943b71254..f788a9458b89 100644
--- a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
+++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
@@ -668,13 +668,16 @@ static int port_attr_stp_state_set(struct net_device *netdev,
 
 static int port_attr_br_flags_set(struct net_device *netdev,
 				  struct switchdev_trans *trans,
-				  unsigned long flags)
+				  unsigned long flags, bool pre_set)
 {
 	struct ethsw_port_priv *port_priv = netdev_priv(netdev);
 	int err = 0;
 
-	if (switchdev_trans_ph_prepare(trans))
+	if (switchdev_trans_ph_prepare(trans) && pre_set) {
+		if (flags & ~(BR_LEARNING | BR_FLOOD))
+			return -EOPNOTSUPP;
 		return 0;
+	}
 
 	/* Learning is enabled per switch */
 	err = ethsw_set_learning(port_priv->ethsw_data, flags & BR_LEARNING);
@@ -691,6 +694,7 @@ static int swdev_port_attr_set(struct net_device *netdev,
 			       const struct switchdev_attr *attr,
 			       struct switchdev_trans *trans)
 {
+	bool pre_set = false;
 	int err = 0;
 
 	switch (attr->id) {
@@ -698,9 +702,11 @@ static int swdev_port_attr_set(struct net_device *netdev,
 		err = port_attr_stp_state_set(netdev, trans,
 					      attr->u.stp_state);
 		break;
+	case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
+		pre_set = true; /* fall through */
 	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
 		err = port_attr_br_flags_set(netdev, trans,
-					     attr->u.brport_flags);
+					     attr->u.brport_flags, pre_set);
 		break;
 	case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
 		/* VLANs are supported by default  */
-- 
2.17.1