net: stmmac: platform: provide stmmac_pltfr_remove_no_dt()

Add a variant of stmmac_pltfr_remove() that only frees resources
allocated by stmmac_pltfr_probe() and - unlike stmmac_pltfr_remove() -
does not call stmmac_remove_config_dt().

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20230623100417.93592-8-brgl@bgdev.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Bartosz Golaszewski

drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c

@@ -762,6 +762,23 @@ int stmmac_pltfr_probe(struct platform_device *pdev,
 }
 EXPORT_SYMBOL_GPL(stmmac_pltfr_probe);
 
+/**
+ * stmmac_pltfr_remove_no_dt
+ * @pdev: pointer to the platform device
+ * Description: This undoes the effects of stmmac_pltfr_probe() by removing the
+ * driver and calling the platform's exit() callback.
+ */
+void stmmac_pltfr_remove_no_dt(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+	struct plat_stmmacenet_data *plat = priv->plat;
+
+	stmmac_dvr_remove(&pdev->dev);
+	stmmac_pltfr_exit(pdev, plat);
+}
+EXPORT_SYMBOL_GPL(stmmac_pltfr_remove_no_dt);
+
 /**
  * stmmac_pltfr_remove
  * @pdev: platform device pointer
@@ -774,8 +791,7 @@ void stmmac_pltfr_remove(struct platform_device *pdev)
 	struct stmmac_priv *priv = netdev_priv(ndev);
 	struct plat_stmmacenet_data *plat = priv->plat;
 
-	stmmac_dvr_remove(&pdev->dev);
-	stmmac_pltfr_exit(pdev, plat);
+	stmmac_pltfr_remove_no_dt(pdev);
 	stmmac_remove_config_dt(pdev, plat);
 }
 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);

drivers/net/ethernet/stmicro/stmmac/stmmac_platform.h

@@ -27,6 +27,7 @@ void stmmac_pltfr_exit(struct platform_device *pdev,
 int stmmac_pltfr_probe(struct platform_device *pdev,
 		       struct plat_stmmacenet_data *plat,
 		       struct stmmac_resources *res);
+void stmmac_pltfr_remove_no_dt(struct platform_device *pdev);
 void stmmac_pltfr_remove(struct platform_device *pdev);
 extern const struct dev_pm_ops stmmac_pltfr_pm_ops;