[PATCH net-next 2/3] net: stmmac: dwmac-rk: Check platform-specific ops

[Ezequiel Garcia]

From: David Wu <david...@rock-chips.com>

Add a check for non-null struct rk_gmac_ops for the
configured PHY interface mode, failing if unsupported.

Signed-off-by: David Wu <david...@rock-chips.com>
[Ezequiel: Refactor so it fails if unsupported]
Signed-off-by: Ezequiel Garcia <ezequ...@collabora.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-rk.c    | 31 +++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c 
b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index c432a9592489..d2637d83899e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -1294,11 +1294,36 @@ static struct rk_priv_data *rk_gmac_setup(struct 
platform_device *pdev,
        return bsp_priv;
 }
 
+static int rk_gmac_check_ops(struct rk_priv_data *bsp_priv)
+{
+       switch (bsp_priv->phy_iface) {
+       case PHY_INTERFACE_MODE_RGMII:
+       case PHY_INTERFACE_MODE_RGMII_ID:
+       case PHY_INTERFACE_MODE_RGMII_RXID:
+       case PHY_INTERFACE_MODE_RGMII_TXID:
+               if (!bsp_priv->ops->set_to_rgmii)
+                       return -EINVAL;
+               break;
+       case PHY_INTERFACE_MODE_RMII:
+               if (!bsp_priv->ops->set_to_rmii)
+                       return -EINVAL;
+               break;
+       default:
+               dev_err(&bsp_priv->pdev->dev,
+                       "unsupported interface %d", bsp_priv->phy_iface);
+       }
+       return 0;
+}
+
 static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)
 {
        int ret;
        struct device *dev = &bsp_priv->pdev->dev;
 
+       ret = rk_gmac_check_ops(bsp_priv);
+       if (ret)
+               return ret;
+
        ret = gmac_clk_enable(bsp_priv, true);
        if (ret)
                return ret;
@@ -1369,10 +1394,12 @@ static void rk_fix_speed(void *priv, unsigned int speed)
        case PHY_INTERFACE_MODE_RGMII_ID:
        case PHY_INTERFACE_MODE_RGMII_RXID:
        case PHY_INTERFACE_MODE_RGMII_TXID:
-               bsp_priv->ops->set_rgmii_speed(bsp_priv, speed);
+               if (bsp_priv->ops->set_rgmii_speed)
+                       bsp_priv->ops->set_rgmii_speed(bsp_priv, speed);
                break;
        case PHY_INTERFACE_MODE_RMII:
-               bsp_priv->ops->set_rmii_speed(bsp_priv, speed);
+               if (bsp_priv->ops->set_rmii_speed)
+                       bsp_priv->ops->set_rmii_speed(bsp_priv, speed);
                break;
        default:
                dev_err(dev, "unsupported interface %d", bsp_priv->phy_iface);
-- 
2.30.0