[PATCH net v1 2/2] net: usb: lan78xx: Fix memory leak on device unplug by freeing PHY device

From: Oleksij Rempel
Date: Sat Nov 16 2024 - 08:06:37 EST


Add calls to `phy_device_free` after `fixed_phy_unregister` to fix a
memory leak that occurs when the device is unplugged. This ensures
proper cleanup of pseudo fixed-link PHYs.

Fixes: 89b36fb5e532 ("lan78xx: Lan7801 Support for Fixed PHY")
Cc: Raghuram Chary J <raghuramchary.jallipalli@xxxxxxxxxxxxx>
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
drivers/net/usb/lan78xx.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 094a47b8b97e..9f191b6ce821 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2380,6 +2380,7 @@ static int lan78xx_phy_init(struct lan78xx_net *dev)
if (dev->chipid == ID_REV_CHIP_ID_7801_) {
if (phy_is_pseudo_fixed_link(phydev)) {
fixed_phy_unregister(phydev);
+ phy_device_free(phydev);
} else {
phy_unregister_fixup_for_uid(PHY_KSZ9031RNX,
0xfffffff0);
@@ -4246,8 +4247,10 @@ static void lan78xx_disconnect(struct usb_interface *intf)

phy_disconnect(net->phydev);

- if (phy_is_pseudo_fixed_link(phydev))
+ if (phy_is_pseudo_fixed_link(phydev)) {
fixed_phy_unregister(phydev);
+ phy_device_free(phydev);
+ }

usb_scuttle_anchored_urbs(&dev->deferred);

--
2.39.5