diff options
| author | Tomas Paukrt <tomaspaukrt@email.cz> | 2024-09-06 13:52:40 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-09-11 02:20:15 +0300 |
| commit | 3f62ea572b3e8e3f10c39a9cb4f04ca9ae5f2952 (patch) | |
| tree | 9017f5cc6cf49c721cc55edfdd8e3fb5040d557f /drivers/net | |
| parent | 48aa361c5db0b380c2b75c24984c0d3e7c1e8c09 (diff) | |
| download | linux-3f62ea572b3e8e3f10c39a9cb4f04ca9ae5f2952.tar.xz | |
net: phy: dp83822: Fix NULL pointer dereference on DP83825 devices
The probe() function is only used for DP83822 and DP83826 PHY,
leaving the private data pointer uninitialized for the DP83825 models
which causes a NULL pointer dereference in the recently introduced/changed
functions dp8382x_config_init() and dp83822_set_wol().
Add the dp8382x_probe() function, so all PHY models will have a valid
private data pointer to fix this issue and also prevent similar issues
in the future.
Fixes: 9ef9ecfa9e9f ("net: phy: dp8382x: keep WOL settings across suspends")
Signed-off-by: Tomas Paukrt <tomaspaukrt@email.cz>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/66w.ZbGt.65Ljx42yHo5.1csjxu@seznam.cz
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/phy/dp83822.c | 35 |
1 files changed, 22 insertions, 13 deletions
diff --git a/drivers/net/phy/dp83822.c b/drivers/net/phy/dp83822.c index efeb643c1373..fc247f479257 100644 --- a/drivers/net/phy/dp83822.c +++ b/drivers/net/phy/dp83822.c @@ -271,8 +271,7 @@ static int dp83822_config_intr(struct phy_device *phydev) DP83822_ENERGY_DET_INT_EN | DP83822_LINK_QUAL_INT_EN); - /* Private data pointer is NULL on DP83825 */ - if (!dp83822 || !dp83822->fx_enabled) + if (!dp83822->fx_enabled) misr_status |= DP83822_ANEG_COMPLETE_INT_EN | DP83822_DUP_MODE_CHANGE_INT_EN | DP83822_SPEED_CHANGED_INT_EN; @@ -292,8 +291,7 @@ static int dp83822_config_intr(struct phy_device *phydev) DP83822_PAGE_RX_INT_EN | DP83822_EEE_ERROR_CHANGE_INT_EN); - /* Private data pointer is NULL on DP83825 */ - if (!dp83822 || !dp83822->fx_enabled) + if (!dp83822->fx_enabled) misr_status |= DP83822_ANEG_ERR_INT_EN | DP83822_WOL_PKT_INT_EN; @@ -691,10 +689,9 @@ static int dp83822_read_straps(struct phy_device *phydev) return 0; } -static int dp83822_probe(struct phy_device *phydev) +static int dp8382x_probe(struct phy_device *phydev) { struct dp83822_private *dp83822; - int ret; dp83822 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83822), GFP_KERNEL); @@ -703,6 +700,20 @@ static int dp83822_probe(struct phy_device *phydev) phydev->priv = dp83822; + return 0; +} + +static int dp83822_probe(struct phy_device *phydev) +{ + struct dp83822_private *dp83822; + int ret; + + ret = dp8382x_probe(phydev); + if (ret) + return ret; + + dp83822 = phydev->priv; + ret = dp83822_read_straps(phydev); if (ret) return ret; @@ -717,14 +728,11 @@ static int dp83822_probe(struct phy_device *phydev) static int dp83826_probe(struct phy_device *phydev) { - struct dp83822_private *dp83822; - - dp83822 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83822), - GFP_KERNEL); - if (!dp83822) - return -ENOMEM; + int ret; - phydev->priv = dp83822; + ret = dp8382x_probe(phydev); + if (ret) + return ret; dp83826_of_init(phydev); @@ -795,6 +803,7 @@ static int dp83822_resume(struct phy_device *phydev) PHY_ID_MATCH_MODEL(_id), \ .name = (_name), \ /* PHY_BASIC_FEATURES */ \ + .probe = dp8382x_probe, \ .soft_reset = dp83822_phy_reset, \ .config_init = dp8382x_config_init, \ .get_wol = dp83822_get_wol, \ |