netdev - [PATCH net] net: hsr: hsr_slave: Fix the promiscuous mode in offload mode

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Date: Fri, 22 Mar 2024 15:34:47 +0530
From: Ravi Gunasekaran <r-gunasekaran@...com>
To: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>
CC: <r-gunasekaran@...com>, <horms@...nel.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <srk@...com>
Subject: [PATCH net] net: hsr: hsr_slave: Fix the promiscuous mode in offload mode

commit e748d0fd66ab ("net: hsr: Disable promiscuous mode in
offload mode") disables promiscuous mode of slave devices
while creating an HSR interface. But while deleting the
HSR interface, it does not take care of it. It decreases the
promiscuous mode count, which eventually enables promiscuous
mode on the slave devices when creating HSR interface again.

Fix this by not decrementing the promiscuous mode count while
deleting the HSR interface when offload is enabled.

Fixes: e748d0fd66ab ("net: hsr: Disable promiscuous mode in offload mode")
Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
---
 net/hsr/hsr_slave.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/hsr/hsr_slave.c b/net/hsr/hsr_slave.c
index e5742f2a2d52..1b6457f357bd 100644
--- a/net/hsr/hsr_slave.c
+++ b/net/hsr/hsr_slave.c
@@ -220,7 +220,8 @@ void hsr_del_port(struct hsr_port *port)
 		netdev_update_features(master->dev);
 		dev_set_mtu(master->dev, hsr_get_max_mtu(hsr));
 		netdev_rx_handler_unregister(port->dev);
-		dev_set_promiscuity(port->dev, -1);
+		if (!port->hsr->fwd_offloaded)
+			dev_set_promiscuity(port->dev, -1);
 		netdev_upper_dev_unlink(port->dev, master->dev);
 	}
 
-- 
2.17.1