From b9926da003cab58594803a2bc5a1d5bd7c670eba Mon Sep 17 00:00:00 2001 From: Calvin Johnson Date: Fri, 11 Jun 2021 13:53:53 +0300 Subject: [PATCH] net: mii_timestamper: check NULL in unregister_mii_timestamper() Callers of unregister_mii_timestamper() currently check for NULL value of mii_ts before calling it. Place the NULL check inside unregister_mii_timestamper() and update the callers accordingly. Signed-off-by: Calvin Johnson Reviewed-by: Andy Shevchenko Suggested-by: Andy Shevchenko Signed-off-by: Ioana Ciornei Acked-by: Grant Likely Signed-off-by: David S. Miller --- drivers/net/mdio/of_mdio.c | 6 ++---- drivers/net/phy/mii_timestamper.c | 3 +++ drivers/net/phy/phy_device.c | 3 +-- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/net/mdio/of_mdio.c b/drivers/net/mdio/of_mdio.c index 29f121cba314..d73c0570f19c 100644 --- a/drivers/net/mdio/of_mdio.c +++ b/drivers/net/mdio/of_mdio.c @@ -115,15 +115,13 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, else phy = get_phy_device(mdio, addr, is_c45); if (IS_ERR(phy)) { - if (mii_ts) - unregister_mii_timestamper(mii_ts); + unregister_mii_timestamper(mii_ts); return PTR_ERR(phy); } rc = of_mdiobus_phy_device_register(mdio, phy, child, addr); if (rc) { - if (mii_ts) - unregister_mii_timestamper(mii_ts); + unregister_mii_timestamper(mii_ts); phy_device_free(phy); return rc; } diff --git a/drivers/net/phy/mii_timestamper.c b/drivers/net/phy/mii_timestamper.c index b71b7456462d..51ae0593a04f 100644 --- a/drivers/net/phy/mii_timestamper.c +++ b/drivers/net/phy/mii_timestamper.c @@ -111,6 +111,9 @@ void unregister_mii_timestamper(struct mii_timestamper *mii_ts) struct mii_timestamping_desc *desc; struct list_head *this; + if (!mii_ts) + return; + /* mii_timestamper statically registered by the PHY driver won't use the * register_mii_timestamper() and thus don't have ->device set. Don't * try to unregister these. diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index f7472a0cf771..85734309b580 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -957,8 +957,7 @@ EXPORT_SYMBOL(phy_device_register); */ void phy_device_remove(struct phy_device *phydev) { - if (phydev->mii_ts) - unregister_mii_timestamper(phydev->mii_ts); + unregister_mii_timestamper(phydev->mii_ts); device_del(&phydev->mdio.dev); -- 2.11.0