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phy: fixed: Fix removal of phys. 

The fixed phys delete function simply removed the fixed phy from the
internal linked list and freed the memory. It however did not
unregister the associated phy device. This meant it was still possible
to find the phy device on the mdio bus.

Make fixed_phy_del() an internal function and add a
fixed_phy_unregister() to unregisters the phy device and then uses
fixed_phy_del() to free resources.

Modify DSA to use this new API function, so we don't leak phys.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2016-03-12 00:01:40 +01:00 committed by David S. Miller
parent ec777e6b42
commit 5bcbe0f35f
3 changed files with 12 additions and 8 deletions
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11
drivers/net/phy/fixed_phy.c
View File

@ -285,7 +285,7 @@ int fixed_phy_add(unsigned int irq, int phy_addr,
}
EXPORT_SYMBOL_GPL(fixed_phy_add);
void fixed_phy_del(int phy_addr)
static void fixed_phy_del(int phy_addr)
{
struct fixed_mdio_bus *fmb = &platform_fmb;
struct fixed_phy *fp, *tmp;
@ -300,7 +300,6 @@ void fixed_phy_del(int phy_addr)
}
}
}
EXPORT_SYMBOL_GPL(fixed_phy_del);
static int phy_fixed_addr;
static DEFINE_SPINLOCK(phy_fixed_addr_lock);
@ -371,6 +370,14 @@ struct phy_device *fixed_phy_register(unsigned int irq,
}
EXPORT_SYMBOL_GPL(fixed_phy_register);
void fixed_phy_unregister(struct phy_device *phy)
{
phy_device_remove(phy);
fixed_phy_del(phy->mdio.addr);
}
EXPORT_SYMBOL_GPL(fixed_phy_unregister);
static int __init fixed_mdio_bus_init(void)
{
struct fixed_mdio_bus *fmb = &platform_fmb;

5
include/linux/phy_fixed.h
View File

@ -19,7 +19,7 @@ extern struct phy_device *fixed_phy_register(unsigned int irq,
struct fixed_phy_status *status,
int link_gpio,
struct device_node *np);
extern void fixed_phy_del(int phy_addr);
extern void fixed_phy_unregister(struct phy_device *phydev);
extern int fixed_phy_set_link_update(struct phy_device *phydev,
int (*link_update)(struct net_device *,
struct fixed_phy_status *));
@ -40,9 +40,8 @@ static inline struct phy_device *fixed_phy_register(unsigned int irq,
{
return ERR_PTR(-ENODEV);
}
static inline int fixed_phy_del(int phy_addr)
static inline void fixed_phy_unregister(struct phy_device *phydev)
{
return -ENODEV;
}
static inline int fixed_phy_set_link_update(struct phy_device *phydev,
int (*link_update)(struct net_device *,

4
net/dsa/dsa.c
View File

@ -447,11 +447,9 @@ static void dsa_switch_destroy(struct dsa_switch *ds)
if (of_phy_is_fixed_link(port_dn)) {
phydev = of_phy_find_device(port_dn);
if (phydev) {
int addr = phydev->mdio.addr;
phy_device_free(phydev);
of_node_put(port_dn);
fixed_phy_del(addr);
fixed_phy_unregister(phydev);
}
}
}