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net: phy: dp83822: Fix NULL pointer dereference on DP83825 devices

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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: 9ef9ecfa9e ("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>
This commit is contained in:
Tomas Paukrt 2024-09-06 12:52:40 +02:00 committed by Jakub Kicinski
parent 48aa361c5d
commit 3f62ea572b
1 changed files with 22 additions and 13 deletions
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35
drivers/net/phy/dp83822.c
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@ -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;
int ret;
dp83822 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83822),
GFP_KERNEL);
if (!dp83822)
return -ENOMEM;
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, \