[PATCH] net: mediatek: fix PPE resource leak on remove

[Guangshuo Li]

mtk_ppe_init() initializes the l2_flows rhashtable for each PPE
instance.

The probe failure path releases these resources with
mtk_ppe_deinit(). However, after a successful probe, mtk_remove()
tears down the network devices without calling mtk_ppe_deinit(),
leaving the PPE rhashtable resources allocated.

Call mtk_ppe_deinit() during device removal before freeing the network
devices.

This issue was found by manual code inspection.

Fixes: 33fc42de3327 ("net: ethernet: mtk_eth_soc: support creating mac address based offload entries")
Cc: stable at vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244 at gmail.com>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index be3bd025c41a..04d0a1eec4cf 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -5394,6 +5394,7 @@ static void mtk_remove(struct platform_device *pdev)
 
 	netif_napi_del(&eth->tx_napi);
 	netif_napi_del(&eth->rx_napi);
+	mtk_ppe_deinit(eth);
 	mtk_cleanup(eth);
 	free_netdev(eth->dummy_dev);
 	mtk_mdio_cleanup(eth);
-- 
2.43.0