target/linux/generic/backport-5.15/728-v6.1-01-net-ethernet-mtk_eth_soc-fix-possible-memory-leak-in.patch

   1 From b3d0d98179d62f9d55635a600679c4fa362baf8d Mon Sep 17 00:00:00 2001
   2 From: Yang Yingliang <yangyingliang@huawei.com>
   3 Date: Mon, 17 Oct 2022 11:51:54 +0800
   4 Subject: [PATCH 1/3] net: ethernet: mtk_eth_soc: fix possible memory leak in
   5  mtk_probe()
   6
   7 If mtk_wed_add_hw() has been called, mtk_wed_exit() needs be called
   8 in error path or removing module to free the memory allocated in
   9 mtk_wed_add_hw().
  10
  11 Fixes: 804775dfc288 ("net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED)")
  12 Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
  13 Signed-off-by: David S. Miller <davem@davemloft.net>
  14 ---
  15  drivers/net/ethernet/mediatek/mtk_eth_soc.c | 17 ++++++++++++-----
  16  1 file changed, 12 insertions(+), 5 deletions(-)
  17
  18 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  19 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  20 @@ -4007,19 +4007,23 @@ static int mtk_probe(struct platform_dev
  21                         eth->irq[i] = platform_get_irq(pdev, i);
  22                 if (eth->irq[i] < 0) {
  23                         dev_err(&pdev->dev, "no IRQ%d resource found\n", i);
  24 -                       return -ENXIO;
  25 +                       err = -ENXIO;
  26 +                       goto err_wed_exit;
  27                 }
  28         }
  29         for (i = 0; i < ARRAY_SIZE(eth->clks); i++) {
  30                 eth->clks[i] = devm_clk_get(eth->dev,
  31                                             mtk_clks_source_name[i]);
  32                 if (IS_ERR(eth->clks[i])) {
  33 -                       if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER)
  34 -                               return -EPROBE_DEFER;
  35 +                       if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER) {
  36 +                               err = -EPROBE_DEFER;
  37 +                               goto err_wed_exit;
  38 +                       }
  39                         if (eth->soc->required_clks & BIT(i)) {
  40                                 dev_err(&pdev->dev, "clock %s not found\n",
  41                                         mtk_clks_source_name[i]);
  42 -                               return -EINVAL;
  43 +                               err = -EINVAL;
  44 +                               goto err_wed_exit;
  45                         }
  46                         eth->clks[i] = NULL;
  47                 }
  48 @@ -4030,7 +4034,7 @@ static int mtk_probe(struct platform_dev
  49
  50         err = mtk_hw_init(eth);
  51         if (err)
  52 -               return err;
  53 +               goto err_wed_exit;
  54
  55         eth->hwlro = MTK_HAS_CAPS(eth->soc->caps, MTK_HWLRO);
  56
  57 @@ -4128,6 +4132,8 @@ err_free_dev:
  58         mtk_free_dev(eth);
  59  err_deinit_hw:
  60         mtk_hw_deinit(eth);
  61 +err_wed_exit:
  62 +       mtk_wed_exit();
  63
  64         return err;
  65  }
  66 @@ -4147,6 +4153,7 @@ static int mtk_remove(struct platform_de
  67                 phylink_disconnect_phy(mac->phylink);
  68         }
  69
  70 +       mtk_wed_exit();
  71         mtk_hw_deinit(eth);
  72
  73         netif_napi_del(&eth->tx_napi);