net: dsa: bcm_sf2: Fix driver removal

With the DSA core doing the call to dsa_port_disable() we do not need to
do that within the driver itself. This could cause an use after free
since past dsa_unregister_switch() we should not be accessing any
dsa_switch internal structures.

Fixes: 0394a63acf ("net: dsa: enable and disable all ports")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/bcm_sf2.c

@@ -1215,10 +1215,10 @@ static int bcm_sf2_sw_remove(struct platform_device *pdev)
 	struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
 
 	priv->wol_ports_mask = 0;
+	/* Disable interrupts */
+	bcm_sf2_intr_disable(priv);
 	dsa_unregister_switch(priv->dev->ds);
 	bcm_sf2_cfp_exit(priv->dev->ds);
-	/* Disable all ports and interrupts */
-	bcm_sf2_sw_suspend(priv->dev->ds);
 	bcm_sf2_mdio_unregister(priv);
 
 	return 0;