linux-kernel - [PATCH v2 3/3] bridge: mrp: Restore port state when deleting MRP instance

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Message-ID: <20200521231907.3564679-4-horatiu.vultur@microchip.com>
Date:   Thu, 21 May 2020 23:19:07 +0000
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <jiri@...nulli.us>, <ivecera@...hat.com>, <davem@...emloft.net>,
        <kuba@...nel.org>, <roopa@...ulusnetworks.com>,
        <nikolay@...ulusnetworks.com>, <andrew@...n.ch>,
        <UNGLinuxDriver@...rochip.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <bridge@...ts.linux-foundation.org>
CC:     Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH v2 3/3] bridge: mrp: Restore port state when deleting MRP instance

When a MRP instance is deleted, then restore the port according to the
bridge state. If the bridge is up then the ports will be in forwarding
state otherwise will be in disabled state.

Fixes: 9a9f26e8f7ea ("bridge: mrp: Connect MRP API with the switchdev API")
Acked-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 net/bridge/br_mrp.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/net/bridge/br_mrp.c b/net/bridge/br_mrp.c
index 854e31bf0151e..528d767eb026f 100644
--- a/net/bridge/br_mrp.c
+++ b/net/bridge/br_mrp.c
@@ -223,6 +223,7 @@ static void br_mrp_test_work_expired(struct work_struct *work)
 static void br_mrp_del_impl(struct net_bridge *br, struct br_mrp *mrp)
 {
 	struct net_bridge_port *p;
+	u8 state;
 
 	/* Stop sending MRP_Test frames */
 	cancel_delayed_work_sync(&mrp->test_work);
@@ -234,20 +235,24 @@ static void br_mrp_del_impl(struct net_bridge *br, struct br_mrp *mrp)
 	p = rtnl_dereference(mrp->p_port);
 	if (p) {
 		spin_lock_bh(&br->lock);
-		p->state = BR_STATE_FORWARDING;
+		state = netif_running(br->dev) ?
+				BR_STATE_FORWARDING : BR_STATE_DISABLED;
+		p->state = state;
 		p->flags &= ~BR_MRP_AWARE;
 		spin_unlock_bh(&br->lock);
-		br_mrp_port_switchdev_set_state(p, BR_STATE_FORWARDING);
+		br_mrp_port_switchdev_set_state(p, state);
 		rcu_assign_pointer(mrp->p_port, NULL);
 	}
 
 	p = rtnl_dereference(mrp->s_port);
 	if (p) {
 		spin_lock_bh(&br->lock);
-		p->state = BR_STATE_FORWARDING;
+		state = netif_running(br->dev) ?
+				BR_STATE_FORWARDING : BR_STATE_DISABLED;
+		p->state = state;
 		p->flags &= ~BR_MRP_AWARE;
 		spin_unlock_bh(&br->lock);
-		br_mrp_port_switchdev_set_state(p, BR_STATE_FORWARDING);
+		br_mrp_port_switchdev_set_state(p, state);
 		rcu_assign_pointer(mrp->s_port, NULL);
 	}
 
-- 
2.26.2