[PATCH v1 4/5] fpga: bridge: Use standard dev_release for class driver

[Russ Weight <russell.h.weight@xxxxxxxxx>]

The FPGA bridge class driver data structure is being treated as a managed
resource instead of using standard dev_release call-back to release the
class data structure. This change populates the class.dev_release function
and changes the fpga_bridge_free() function to call put_device(). It also
changes fpga_bridge_unregister() to call device_del() instead of
device_unregister().

Signed-off-by: Russ Weight <russell.h.weight@xxxxxxxxx>
---
 drivers/fpga/fpga-bridge.c | 48 +++++++++++++++++++-------------------
 1 file changed, 24 insertions(+), 24 deletions(-)

diff --git a/drivers/fpga/fpga-bridge.c b/drivers/fpga/fpga-bridge.c
index 05c6d4f2d043..59f40f26035d 100644
--- a/drivers/fpga/fpga-bridge.c
+++ b/drivers/fpga/fpga-bridge.c
@@ -313,7 +313,7 @@ ATTRIBUTE_GROUPS(fpga_bridge);
 
 /**
  * fpga_bridge_create - create and initialize a struct fpga_bridge
- * @dev:	FPGA bridge device from pdev
+ * @parent:	FPGA bridge device from pdev
  * @name:	FPGA bridge name
  * @br_ops:	pointer to structure of fpga bridge ops
  * @priv:	FPGA bridge private data
@@ -323,7 +323,7 @@ ATTRIBUTE_GROUPS(fpga_bridge);
  *
  * Return: struct fpga_bridge or NULL
  */
-struct fpga_bridge *fpga_bridge_create(struct device *dev, const char *name,
+struct fpga_bridge *fpga_bridge_create(struct device *parent, const char *name,
 				       const struct fpga_bridge_ops *br_ops,
 				       void *priv)
 {
@@ -331,7 +331,7 @@ struct fpga_bridge *fpga_bridge_create(struct device *dev, const char *name,
 	int id, ret;
 
 	if (!name || !strlen(name)) {
-		dev_err(dev, "Attempt to register with no name!\n");
+		dev_err(parent, "Attempt to register with no name!\n");
 		return NULL;
 	}
 
@@ -340,8 +340,10 @@ struct fpga_bridge *fpga_bridge_create(struct device *dev, const char *name,
 		return NULL;
 
 	id = ida_simple_get(&fpga_bridge_ida, 0, 0, GFP_KERNEL);
-	if (id < 0)
-		goto error_kfree;
+	if (id < 0) {
+		kfree(bridge);
+		return NULL;
+	}
 
 	mutex_init(&bridge->mutex);
 	INIT_LIST_HEAD(&bridge->node);
@@ -353,22 +355,17 @@ struct fpga_bridge *fpga_bridge_create(struct device *dev, const char *name,
 	device_initialize(&bridge->dev);
 	bridge->dev.groups = br_ops->groups;
 	bridge->dev.class = fpga_bridge_class;
-	bridge->dev.parent = dev;
-	bridge->dev.of_node = dev->of_node;
+	bridge->dev.parent = parent;
+	bridge->dev.of_node = parent->of_node;
 	bridge->dev.id = id;
 
 	ret = dev_set_name(&bridge->dev, "br%d", id);
-	if (ret)
-		goto error_device;
+	if (ret) {
+		put_device(&bridge->dev);
+		return NULL;
+	}
 
 	return bridge;
-
-error_device:
-	ida_simple_remove(&fpga_bridge_ida, id);
-error_kfree:
-	kfree(bridge);
-
-	return NULL;
 }
 EXPORT_SYMBOL_GPL(fpga_bridge_create);
 
@@ -378,8 +375,7 @@ EXPORT_SYMBOL_GPL(fpga_bridge_create);
  */
 void fpga_bridge_free(struct fpga_bridge *bridge)
 {
-	ida_simple_remove(&fpga_bridge_ida, bridge->dev.id);
-	kfree(bridge);
+	put_device(&bridge->dev);
 }
 EXPORT_SYMBOL_GPL(fpga_bridge_free);
 
@@ -387,12 +383,12 @@ static void devm_fpga_bridge_release(struct device *dev, void *res)
 {
 	struct fpga_bridge *bridge = *(struct fpga_bridge **)res;
 
-	fpga_bridge_free(bridge);
+	put_device(&bridge->dev);
 }
 
 /**
  * devm_fpga_bridge_create - create and init a managed struct fpga_bridge
- * @dev:	FPGA bridge device from pdev
+ * @parent:	FPGA bridge device from pdev
  * @name:	FPGA bridge name
  * @br_ops:	pointer to structure of fpga bridge ops
  * @priv:	FPGA bridge private data
@@ -408,7 +404,7 @@ static void devm_fpga_bridge_release(struct device *dev, void *res)
  *  Return: struct fpga_bridge or NULL
  */
 struct fpga_bridge
-*devm_fpga_bridge_create(struct device *dev, const char *name,
+*devm_fpga_bridge_create(struct device *parent, const char *name,
 			 const struct fpga_bridge_ops *br_ops, void *priv)
 {
 	struct fpga_bridge **ptr, *bridge;
@@ -417,12 +413,12 @@ struct fpga_bridge
 	if (!ptr)
 		return NULL;
 
-	bridge = fpga_bridge_create(dev, name, br_ops, priv);
+	bridge = fpga_bridge_create(parent, name, br_ops, priv);
 	if (!bridge) {
 		devres_free(ptr);
 	} else {
 		*ptr = bridge;
-		devres_add(dev, ptr);
+		devres_add(parent, ptr);
 	}
 
 	return bridge;
@@ -469,12 +465,16 @@ void fpga_bridge_unregister(struct fpga_bridge *bridge)
 	if (bridge->br_ops && bridge->br_ops->fpga_bridge_remove)
 		bridge->br_ops->fpga_bridge_remove(bridge);
 
-	device_unregister(&bridge->dev);
+	device_del(&bridge->dev);
 }
 EXPORT_SYMBOL_GPL(fpga_bridge_unregister);
 
 static void fpga_bridge_dev_release(struct device *dev)
 {
+	struct fpga_bridge *bridge = to_fpga_bridge(dev);
+
+	ida_simple_remove(&fpga_bridge_ida, bridge->dev.id);
+	kfree(bridge);
 }
 
 static int __init fpga_bridge_dev_init(void)
-- 
2.25.1