[PATCH 2/6] fixed_phy: add fixed_phy_unregister()

[Stas Sergeev]

A counterpart of fixed_phy_register().
Can be used on failure path, like below:

phy = fixed_phy_register(...);
phy->priv = kmalloc(...);
if (!phy->priv) {
    fixed_phy_unregister(phy);
    return -ENOMEM;
}

CC: Florian Fainelli <f.fainelli@xxxxxxxxx>
CC: netdev@xxxxxxxxxxxxxxx
CC: linux-kernel@xxxxxxxxxxxxxxx

Signed-off-by: Stas Sergeev <stsp@xxxxxxxxxxxxxxxxxxxxx>
---
 drivers/net/phy/fixed_phy.c  |   11 +++++++++++
 drivers/net/phy/phy_device.c |    7 +++++++
 include/linux/phy.h          |    1 +
 include/linux/phy_fixed.h    |    4 ++++
 4 files changed, 23 insertions(+)

diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index 8078998..c2e82a0 100644
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -275,6 +275,17 @@ struct phy_device *fixed_phy_register(unsigned int irq,
 }
 EXPORT_SYMBOL_GPL(fixed_phy_register);

+void fixed_phy_unregister(struct phy_device *phy)
+{
+	struct device_node *np = phy->dev.of_node;
+
+	fixed_phy_del(phy->addr);
+	phy_device_unregister(phy);
+	phy_device_free(phy);
+	of_node_put(np);
+}
+EXPORT_SYMBOL_GPL(fixed_phy_unregister);
+
 static int __init fixed_mdio_bus_init(void)
 {
 	struct fixed_mdio_bus *fmb = &platform_fmb;
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index bdfe51f..8923c0d 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -375,6 +375,13 @@ int phy_device_register(struct phy_device *phydev)
 }
 EXPORT_SYMBOL(phy_device_register);

+void phy_device_unregister(struct phy_device *phydev)
+{
+	phydev->bus->phy_map[phydev->addr] = NULL;
+	device_del(&phydev->dev);
+}
+EXPORT_SYMBOL(phy_device_unregister);
+
 /**
  * phy_find_first - finds the first PHY device on the bus
  * @bus: the target MII bus
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 6858098..448dda3 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -714,6 +714,7 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
 				     struct phy_c45_device_ids *c45_ids);
 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);
 int phy_device_register(struct phy_device *phy);
+void phy_device_unregister(struct phy_device *phydev);
 int phy_init_hw(struct phy_device *phydev);
 int phy_suspend(struct phy_device *phydev);
 int phy_resume(struct phy_device *phydev);
diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h
index ac82e6d..bb7d17c 100644
--- a/include/linux/phy_fixed.h
+++ b/include/linux/phy_fixed.h
@@ -17,6 +17,7 @@ extern int fixed_phy_add(unsigned int irq, int phy_id,
 extern struct phy_device *fixed_phy_register(unsigned int irq,
 					     struct fixed_phy_status *status,
 					     struct device_node *np);
+extern void fixed_phy_unregister(struct phy_device *phy);
 extern void fixed_phy_del(int phy_addr);
 extern int fixed_phy_set_link_update(struct phy_device *phydev,
 			int (*link_update)(struct phy_device *,
@@ -33,6 +34,9 @@ static inline struct phy_device *fixed_phy_register(unsigned int irq,
 {
 	return ERR_PTR(-ENODEV);
 }
+static inline void fixed_phy_unregister(struct phy_device *phy)
+{
+}
 static inline int fixed_phy_del(int phy_addr)
 {
 	return -ENODEV;
-- 
1.7.9.5
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