netdev - [PATCH net] net: sfp: fix unbind

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Message-Id: <E1icHww-00043d-U9@rmk-PC.armlinux.org.uk>
Date:   Tue, 03 Dec 2019 23:51:22 +0000
From:   Russell King <rmk+kernel@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: [PATCH net] net: sfp: fix unbind

When unbinding, we don't correctly tear down the module state, leaving
(for example) the hwmon registration behind. Ensure everything is
properly removed by sending a remove event at unbind.

Fixes: 6b0da5c9c1a3 ("net: sfp: track upstream's attachment state in state machine")
Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
---
 drivers/net/phy/sfp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index 8d05e888d3f8..78f53da1e34e 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -2294,6 +2294,10 @@ static int sfp_remove(struct platform_device *pdev)
 
 	sfp_unregister_socket(sfp->sfp_bus);
 
+	rtnl_lock();
+	sfp_sm_event(sfp, SFP_E_REMOVE);
+	rtnl_unlock();
+
 	return 0;
 }
 
-- 
2.20.1