target/linux/brcm63xx/patches-4.14/001-4.15-11-bcm63xx_enet-use-managed-functions-for-clock-ioremap.patch

   1 From 179a445ae4ef36ec44f4aea18e5f42d21334d186 Mon Sep 17 00:00:00 2001
   2 From: Jonas Gorski <jonas.gorski@gmail.com>
   3 Date: Sat, 25 Feb 2017 12:39:25 +0100
   4 Subject: [PATCH 4/6] bcm63xx_enet: use managed functions for clock/ioremap
   5
   6 Use managed functions where possible to reduce the amount of resource
   7 handling on error and remove paths.
   8
   9 Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
  10 ---
  11  drivers/net/ethernet/broadcom/bcm63xx_enet.c | 54 +++++++---------------------
  12  1 file changed, 12 insertions(+), 42 deletions(-)
  13
  14 --- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
  15 +++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
  16 @@ -1768,14 +1768,14 @@ static int bcm_enet_probe(struct platfor
  17                 clk_name = "enet1";
  18         }
  19
  20 -       priv->mac_clk = clk_get(&pdev->dev, clk_name);
  21 +       priv->mac_clk = devm_clk_get(&pdev->dev, clk_name);
  22         if (IS_ERR(priv->mac_clk)) {
  23                 ret = PTR_ERR(priv->mac_clk);
  24                 goto out;
  25         }
  26         ret = clk_prepare_enable(priv->mac_clk);
  27         if (ret)
  28 -               goto out_put_clk_mac;
  29 +               goto out;
  30
  31         /* initialize default and fetch platform data */
  32         priv->rx_ring_size = BCMENET_DEF_RX_DESC;
  33 @@ -1803,7 +1803,7 @@ static int bcm_enet_probe(struct platfor
  34
  35         if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
  36                 /* using internal PHY, enable clock */
  37 -               priv->phy_clk = clk_get(&pdev->dev, "ephy");
  38 +               priv->phy_clk = devm_clk_get(&pdev->dev, "ephy");
  39                 if (IS_ERR(priv->phy_clk)) {
  40                         ret = PTR_ERR(priv->phy_clk);
  41                         priv->phy_clk = NULL;
  42 @@ -1811,7 +1811,7 @@ static int bcm_enet_probe(struct platfor
  43                 }
  44                 ret = clk_prepare_enable(priv->phy_clk);
  45                 if (ret)
  46 -                       goto out_put_clk_phy;
  47 +                       goto out_disable_clk_mac;
  48         }
  49
  50         /* do minimal hardware init to be able to probe mii bus */
  51 @@ -1908,14 +1908,8 @@ out_uninit_hw:
  52         if (priv->phy_clk)
  53                 clk_disable_unprepare(priv->phy_clk);
  54
  55 -out_put_clk_phy:
  56 -       if (priv->phy_clk)
  57 -               clk_put(priv->phy_clk);
  58 -
  59  out_disable_clk_mac:
  60         clk_disable_unprepare(priv->mac_clk);
  61 -out_put_clk_mac:
  62 -       clk_put(priv->mac_clk);
  63  out:
  64         free_netdev(dev);
  65         return ret;
  66 @@ -1951,12 +1945,10 @@ static int bcm_enet_remove(struct platfo
  67         }
  68
  69         /* disable hw block clocks */
  70 -       if (priv->phy_clk) {
  71 +       if (priv->phy_clk)
  72                 clk_disable_unprepare(priv->phy_clk);
  73 -               clk_put(priv->phy_clk);
  74 -       }
  75 +
  76         clk_disable_unprepare(priv->mac_clk);
  77 -       clk_put(priv->mac_clk);
  78
  79         free_netdev(dev);
  80         return 0;
  81 @@ -2739,26 +2731,20 @@ static int bcm_enetsw_probe(struct platf
  82         if (ret)
  83                 goto out;
  84
  85 -       if (!request_mem_region(res_mem->start, resource_size(res_mem),
  86 -                               "bcm63xx_enetsw")) {
  87 -               ret = -EBUSY;
  88 +       priv->base = devm_ioremap_resource(&pdev->dev, res_mem);
  89 +       if (IS_ERR(priv->base)) {
  90 +               ret = PTR_ERR(priv->base);
  91                 goto out;
  92         }
  93
  94 -       priv->base = ioremap(res_mem->start, resource_size(res_mem));
  95 -       if (priv->base == NULL) {
  96 -               ret = -ENOMEM;
  97 -               goto out_release_mem;
  98 -       }
  99 -
 100 -       priv->mac_clk = clk_get(&pdev->dev, "enetsw");
 101 +       priv->mac_clk = devm_clk_get(&pdev->dev, "enetsw");
 102         if (IS_ERR(priv->mac_clk)) {
 103                 ret = PTR_ERR(priv->mac_clk);
 104 -               goto out_unmap;
 105 +               goto out;
 106         }
 107         ret = clk_prepare_enable(priv->mac_clk);
 108         if (ret)
 109 -               goto out_put_clk;
 110 +               goto out;
 111
 112         priv->rx_chan = 0;
 113         priv->tx_chan = 1;
 114 @@ -2790,15 +2776,6 @@ static int bcm_enetsw_probe(struct platf
 115
 116  out_disable_clk:
 117         clk_disable_unprepare(priv->mac_clk);
 118 -
 119 -out_put_clk:
 120 -       clk_put(priv->mac_clk);
 121 -
 122 -out_unmap:
 123 -       iounmap(priv->base);
 124 -
 125 -out_release_mem:
 126 -       release_mem_region(res_mem->start, resource_size(res_mem));
 127  out:
 128         free_netdev(dev);
 129         return ret;
 130 @@ -2810,20 +2787,13 @@ static int bcm_enetsw_remove(struct plat
 131  {
 132         struct bcm_enet_priv *priv;
 133         struct net_device *dev;
 134 -       struct resource *res;
 135
 136         /* stop netdevice */
 137         dev = platform_get_drvdata(pdev);
 138         priv = netdev_priv(dev);
 139         unregister_netdev(dev);
 140
 141 -       /* release device resources */
 142 -       iounmap(priv->base);
 143 -       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 144 -       release_mem_region(res->start, resource_size(res));
 145 -
 146         clk_disable_unprepare(priv->mac_clk);
 147 -       clk_put(priv->mac_clk);
 148
 149         free_netdev(dev);
 150         return 0;