[PATCH net v4 3/4] net: phy: dp83640: clear state after PTP registration failure

[xuanqiang.luo@linux.dev]

From: Xuanqiang Luo <luoxuanqiang@kylinos.cn>

dp83640_probe() publishes its per-PHY state through phydev before
registering the PTP clock. If registration fails, the private data is
freed while phydev->mii_ts and phydev->priv still point to it, and
default_timestamp remains set.

Clear the published PHY state and reset the PTP clock pointer before
freeing the private data.

Fixes: 4715f65ffa05 ("net: Introduce a new MII time stamping interface.")
Signed-off-by: Xuanqiang Luo <luoxuanqiang@kylinos.cn>
---
 drivers/net/phy/dp83640.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index ba39d30b74705..7aa5cf0a7bb03 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -1449,6 +1449,10 @@ static int dp83640_probe(struct phy_device *phydev)
 
 no_register:
 	clock->chosen = NULL;
+	clock->ptp_clock = NULL;
+	phydev->default_timestamp = false;
+	phydev->mii_ts = NULL;
+	phydev->priv = NULL;
 	kfree(dp83640);
 no_memory:
 	dp83640_clock_put(clock);
-- 
2.43.0