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| author | Andre Werner <andre.werner@systec-electronic.com> | 2024-01-29 14:55:04 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-01-31 16:22:28 -0800 |
| commit | 61c81872815f46006982bb80460c0c80a949b35b (patch) | |
| tree | 7e3c7565cdc31d97aedec9306da9d319595eaf36 /drivers/net/phy/phy_device.c | |
| parent | 96b93f08357c4cc858ec7543464f07e461e5713a (diff) | |
| download | linux-61c81872815f46006982bb80460c0c80a949b35b.tar.gz linux-61c81872815f46006982bb80460c0c80a949b35b.tar.bz2 linux-61c81872815f46006982bb80460c0c80a949b35b.zip | |
net: phy: phy_device: Prevent nullptr exceptions on ISR
If phydev->irq is set unconditionally, check
for valid interrupt handler or fall back to polling mode to prevent
nullptr exceptions in interrupt service routine.
Signed-off-by: Andre Werner <andre.werner@systec-electronic.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20240129135734.18975-2-andre.werner@systec-electronic.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/phy/phy_device.c')
| -rw-r--r-- | drivers/net/phy/phy_device.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index dd778c7fde1d..52828d1c64f7 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1413,6 +1413,11 @@ int phy_sfp_probe(struct phy_device *phydev, } EXPORT_SYMBOL(phy_sfp_probe); +static bool phy_drv_supports_irq(struct phy_driver *phydrv) +{ + return phydrv->config_intr && phydrv->handle_interrupt; +} + /** * phy_attach_direct - attach a network device to a given PHY device pointer * @dev: network device to attach @@ -1527,6 +1532,9 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, if (phydev->dev_flags & PHY_F_NO_IRQ) phydev->irq = PHY_POLL; + if (!phy_drv_supports_irq(phydev->drv) && phy_interrupt_is_valid(phydev)) + phydev->irq = PHY_POLL; + /* Port is set to PORT_TP by default and the actual PHY driver will set * it to different value depending on the PHY configuration. If we have * the generic PHY driver we can't figure it out, thus set the old @@ -2992,11 +3000,6 @@ s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev, } EXPORT_SYMBOL(phy_get_internal_delay); -static bool phy_drv_supports_irq(struct phy_driver *phydrv) -{ - return phydrv->config_intr && phydrv->handle_interrupt; -} - static int phy_led_set_brightness(struct led_classdev *led_cdev, enum led_brightness value) { |