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net: phy: dp83640: improve phydev and driver removal handling

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Once the last user of a clock has been removed, the clock should be
removed. So far orphaned clocks are cleaned up in dp83640_free_clocks()
only. Add the logic to remove orphaned clocks in dp83640_remove().
This allows to simplify the code, and use standard macro
module_phy_driver(). dp83640 was the last external user of
phy_driver_register(), so we can stop exporting this function afterwards.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/6d4e80e7-c684-4d95-abbd-ea62b79a9a8a@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Heiner Kallweit
2025-09-20 23:33:16 +02:00
committed by Jakub Kicinski
parent 7e554f317b
commit 42e2a9e11a
1 changed files with 20 additions and 38 deletions
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58
drivers/net/phy/dp83640.c
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@@ -953,30 +953,6 @@ static void decode_status_frame(struct dp83640_private *dp83640,
}
}
static void dp83640_free_clocks(void)
{
struct dp83640_clock *clock;
struct list_head *this, *next;
mutex_lock(&phyter_clocks_lock);
list_for_each_safe(this, next, &phyter_clocks) {
clock = list_entry(this, struct dp83640_clock, list);
if (!list_empty(&clock->phylist)) {
pr_warn("phy list non-empty while unloading\n");
BUG();
}
list_del(&clock->list);
mutex_destroy(&clock->extreg_lock);
mutex_destroy(&clock->clock_lock);
put_device(&clock->bus->dev);
kfree(clock->caps.pin_config);
kfree(clock);
}
mutex_unlock(&phyter_clocks_lock);
}
static void dp83640_clock_init(struct dp83640_clock *clock, struct mii_bus *bus)
{
INIT_LIST_HEAD(&clock->list);
@@ -1479,6 +1455,7 @@ static void dp83640_remove(struct phy_device *phydev)
struct dp83640_clock *clock;
struct list_head *this, *next;
struct dp83640_private *tmp, *dp83640 = phydev->priv;
bool remove_clock = false;
if (phydev->mdio.addr == BROADCAST_ADDR)
return;
@@ -1506,11 +1483,27 @@ static void dp83640_remove(struct phy_device *phydev)
}
}
if (!clock->chosen && list_empty(&clock->phylist))
remove_clock = true;
dp83640_clock_put(clock);
kfree(dp83640);
if (remove_clock) {
mutex_lock(&phyter_clocks_lock);
list_del(&clock->list);
mutex_unlock(&phyter_clocks_lock);
mutex_destroy(&clock->extreg_lock);
mutex_destroy(&clock->clock_lock);
put_device(&clock->bus->dev);
kfree(clock->caps.pin_config);
kfree(clock);
}
}
static struct phy_driver dp83640_driver = {
static struct phy_driver dp83640_driver[] = {
{
.phy_id = DP83640_PHY_ID,
.phy_id_mask = 0xfffffff0,
.name = "NatSemi DP83640",
@@ -1521,26 +1514,15 @@ static struct phy_driver dp83640_driver = {
.config_init = dp83640_config_init,
.config_intr = dp83640_config_intr,
.handle_interrupt = dp83640_handle_interrupt,
},
};
static int __init dp83640_init(void)
{
return phy_driver_register(&dp83640_driver, THIS_MODULE);
}
static void __exit dp83640_exit(void)
{
dp83640_free_clocks();
phy_driver_unregister(&dp83640_driver);
}
module_phy_driver(dp83640_driver);
MODULE_DESCRIPTION("National Semiconductor DP83640 PHY driver");
MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
MODULE_LICENSE("GPL");
module_init(dp83640_init);
module_exit(dp83640_exit);
static const struct mdio_device_id __maybe_unused dp83640_tbl[] = {
{ DP83640_PHY_ID, 0xfffffff0 },
{ }