net: stmmac: dwmac-qco-ethqos: use devm_stmmac_probe_config_dt()

Significantly simplify the driver's probe() function by using the devres
variant of stmmac_probe_config_dt(). This allows to drop the goto jumps
entirely.

The remove_new() callback now needs to be switched to
stmmac_pltfr_remove_no_dt().

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20230623100417.93592-10-brgl@bgdev.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Bartosz Golaszewski

drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c

@@ -708,7 +708,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac);
+	plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
 	if (IS_ERR(plat_dat)) {
 		dev_err(dev, "dt configuration failed\n");
 		return PTR_ERR(plat_dat);
@@ -717,10 +717,8 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	plat_dat->clks_config = ethqos_clks_config;
 
 	ethqos = devm_kzalloc(dev, sizeof(*ethqos), GFP_KERNEL);
-	if (!ethqos) {
-		ret = -ENOMEM;
-		goto out_config_dt;
-	}
+	if (!ethqos)
+		return -ENOMEM;
 
 	ethqos->phy_mode = device_get_phy_mode(dev);
 	switch (ethqos->phy_mode) {
@@ -734,19 +732,15 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 		ethqos->configure_func = ethqos_configure_sgmii;
 		break;
 	case -ENODEV:
-		ret = -ENODEV;
-		goto out_config_dt;
+		return -ENODEV;
 	default:
-		ret = -EINVAL;
-		goto out_config_dt;
+		return -EINVAL;
 	}
 
 	ethqos->pdev = pdev;
 	ethqos->rgmii_base = devm_platform_ioremap_resource_byname(pdev, "rgmii");
-	if (IS_ERR(ethqos->rgmii_base)) {
-		ret = PTR_ERR(ethqos->rgmii_base);
-		goto out_config_dt;
-	}
+	if (IS_ERR(ethqos->rgmii_base))
+		return PTR_ERR(ethqos->rgmii_base);
 
 	ethqos->mac_base = stmmac_res.addr;
 
@@ -757,24 +751,20 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	ethqos->has_emac_ge_3 = data->has_emac_ge_3;
 
 	ethqos->link_clk = devm_clk_get(dev, data->link_clk_name ?: "rgmii");
-	if (IS_ERR(ethqos->link_clk)) {
-		ret = PTR_ERR(ethqos->link_clk);
-		goto out_config_dt;
-	}
+	if (IS_ERR(ethqos->link_clk))
+		return PTR_ERR(ethqos->link_clk);
 
 	ret = ethqos_clks_config(ethqos, true);
 	if (ret)
-		goto out_config_dt;
+		return ret;
 
 	ret = devm_add_action_or_reset(dev, ethqos_clks_disable, ethqos);
 	if (ret)
-		goto out_config_dt;
+		return ret;
 
 	ethqos->serdes_phy = devm_phy_optional_get(dev, "serdes");
-	if (IS_ERR(ethqos->serdes_phy)) {
-		ret = PTR_ERR(ethqos->serdes_phy);
-		goto out_config_dt;
-	}
+	if (IS_ERR(ethqos->serdes_phy))
+		return PTR_ERR(ethqos->serdes_phy);
 
 	ethqos->speed = SPEED_1000;
 	ethqos_update_link_clk(ethqos, SPEED_1000);
@@ -797,16 +787,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 		plat_dat->serdes_powerdown  = qcom_ethqos_serdes_powerdown;
 	}
 
-	ret = stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
-	if (ret)
-		goto out_config_dt;
-
-	return ret;
-
-out_config_dt:
-	stmmac_remove_config_dt(pdev, plat_dat);
-
-	return ret;
+	return stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
 }
 
 static const struct of_device_id qcom_ethqos_match[] = {
@@ -820,7 +801,7 @@ MODULE_DEVICE_TABLE(of, qcom_ethqos_match);
 
 static struct platform_driver qcom_ethqos_driver = {
 	.probe  = qcom_ethqos_probe,
-	.remove_new = stmmac_pltfr_remove,
+	.remove_new = stmmac_pltfr_remove_no_dt,
 	.driver = {
 		.name           = "qcom-ethqos",
 		.pm		= &stmmac_pltfr_pm_ops,