net: ethernet: mtk_eth_soc: fix possible memory leak in mtk_probe()

If mtk_wed_add_hw() has been called, mtk_wed_exit() needs be called
in error path or removing module to free the memory allocated in
mtk_wed_add_hw().

Fixes: 804775dfc288 ("net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED)")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 4fba7cb..7cd3815 100644 (file)
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -4060,19 +4060,23 @@ static int mtk_probe(struct platform_device *pdev)
                        eth->irq[i] = platform_get_irq(pdev, i);
                if (eth->irq[i] < 0) {
                        dev_err(&pdev->dev, "no IRQ%d resource found\n", i);
-                       return -ENXIO;
+                       err = -ENXIO;
+                       goto err_wed_exit;
                }
        }
        for (i = 0; i < ARRAY_SIZE(eth->clks); i++) {
                eth->clks[i] = devm_clk_get(eth->dev,
                                            mtk_clks_source_name[i]);
                if (IS_ERR(eth->clks[i])) {
-                       if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER)
-                               return -EPROBE_DEFER;
+                       if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER) {
+                               err = -EPROBE_DEFER;
+                               goto err_wed_exit;
+                       }
                        if (eth->soc->required_clks & BIT(i)) {
                                dev_err(&pdev->dev, "clock %s not found\n",
                                        mtk_clks_source_name[i]);
-                               return -EINVAL;
+                               err = -EINVAL;
+                               goto err_wed_exit;
                        }
                        eth->clks[i] = NULL;
                }
@@ -4083,7 +4087,7 @@ static int mtk_probe(struct platform_device *pdev)
 
        err = mtk_hw_init(eth);
        if (err)
-               return err;
+               goto err_wed_exit;
 
        eth->hwlro = MTK_HAS_CAPS(eth->soc->caps, MTK_HWLRO);
 
@@ -4179,6 +4183,8 @@ err_free_dev:
        mtk_free_dev(eth);
 err_deinit_hw:
        mtk_hw_deinit(eth);
+err_wed_exit:
+       mtk_wed_exit();
 
        return err;
 }
@@ -4198,6 +4204,7 @@ static int mtk_remove(struct platform_device *pdev)
                phylink_disconnect_phy(mac->phylink);
        }
 
+       mtk_wed_exit();
        mtk_hw_deinit(eth);
 
        netif_napi_del(&eth->tx_napi);