[PATCH] net: lantiq: fix netdev leak on remove

[Guangshuo Li <lgs201920130244@gmail.com>]

ltq_etop_probe() allocates the network device with alloc_etherdev_mq(),
but the remove path does not call the matching free_netdev() after
unregistering the device.

The probe failure path releases the allocated network device with
free_netdev(). However, after a successful probe, ltq_etop_remove()
only unregisters the network device and leaves the allocation alive.

Call free_netdev() after unregister_netdev() to release the network
device during driver removal.

This issue was found by manual code inspection.

Fixes: 504d4721ee8e ("MIPS: Lantiq: Add ethernet driver")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
---
 drivers/net/ethernet/lantiq_etop.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/lantiq_etop.c b/drivers/net/ethernet/lantiq_etop.c
index 83ce3bfefa5c..ecf2f3cbf4d9 100644
--- a/drivers/net/ethernet/lantiq_etop.c
+++ b/drivers/net/ethernet/lantiq_etop.c
@@ -711,6 +711,7 @@ static void ltq_etop_remove(struct platform_device *pdev)
 		ltq_etop_hw_exit(dev);
 		ltq_etop_mdio_cleanup(dev);
 		unregister_netdev(dev);
+		free_netdev(dev);
 	}
 }
 
-- 
2.43.0