| Message ID | 20190224001115.17497-1-linus.walleij@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] net: phy: realtek: Dummy IRQ calls for RTL8366RB | expand |
On Sun, Feb 24, 2019 at 01:11:15AM +0100, Linus Walleij wrote: > This fixes a regression introduced by > commit 0d2e778e38e0ddffab4bb2b0e9ed2ad5165c4bf7 > "net: phy: replace PHY_HAS_INTERRUPT with a check for > config_intr and ack_interrupt". > > This assumes that a PHY cannot trigger interrupt unless > it has .config_intr() or .ack_interrupt() implemented. > A later patch makes the code assume both need to be > implemented for interrupts to be present. > > But this PHY (which is inside a DSA) will happily > fire interrupts without either callback. > > Implement dummy callbacks for .config_intr() and > .ack_interrupt() in the phy header to fix this. > > Tested on the RTL8366RB on D-Link DIR-685. > > Fixes: 0d2e778e38e0 ("net: phy: replace PHY_HAS_INTERRUPT with a check for config_intr and ack_interrupt") > Cc: Heiner Kallweit <hkallweit1@gmail.com> > Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Andrew
From: Linus Walleij <linus.walleij@linaro.org> Date: Sun, 24 Feb 2019 01:11:15 +0100 > This fixes a regression introduced by > commit 0d2e778e38e0ddffab4bb2b0e9ed2ad5165c4bf7 > "net: phy: replace PHY_HAS_INTERRUPT with a check for > config_intr and ack_interrupt". > > This assumes that a PHY cannot trigger interrupt unless > it has .config_intr() or .ack_interrupt() implemented. > A later patch makes the code assume both need to be > implemented for interrupts to be present. > > But this PHY (which is inside a DSA) will happily > fire interrupts without either callback. > > Implement dummy callbacks for .config_intr() and > .ack_interrupt() in the phy header to fix this. > > Tested on the RTL8366RB on D-Link DIR-685. > > Fixes: 0d2e778e38e0 ("net: phy: replace PHY_HAS_INTERRUPT with a check for config_intr and ack_interrupt") > Cc: Heiner Kallweit <hkallweit1@gmail.com> > Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Applied.
diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c index c6010fb1aa0f..cb4a23041a94 100644 --- a/drivers/net/phy/realtek.c +++ b/drivers/net/phy/realtek.c @@ -282,6 +282,13 @@ static struct phy_driver realtek_drvs[] = { .name = "RTL8366RB Gigabit Ethernet", .features = PHY_GBIT_FEATURES, .config_init = &rtl8366rb_config_init, + /* These interrupts are handled by the irq controller + * embedded inside the RTL8366RB, they get unmasked when the + * irq is requested and ACKed by reading the status register, + * which is done by the irqchip code. + */ + .ack_interrupt = genphy_no_ack_interrupt, + .config_intr = genphy_no_config_intr, .suspend = genphy_suspend, .resume = genphy_resume, }, diff --git a/include/linux/phy.h b/include/linux/phy.h index 127fcc9c3778..333b56d8f746 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -992,6 +992,14 @@ static inline int genphy_no_soft_reset(struct phy_device *phydev) { return 0; } +static inline int genphy_no_ack_interrupt(struct phy_device *phydev) +{ + return 0; +} +static inline int genphy_no_config_intr(struct phy_device *phydev) +{ + return 0; +} int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum); int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
This fixes a regression introduced by commit 0d2e778e38e0ddffab4bb2b0e9ed2ad5165c4bf7 "net: phy: replace PHY_HAS_INTERRUPT with a check for config_intr and ack_interrupt". This assumes that a PHY cannot trigger interrupt unless it has .config_intr() or .ack_interrupt() implemented. A later patch makes the code assume both need to be implemented for interrupts to be present. But this PHY (which is inside a DSA) will happily fire interrupts without either callback. Implement dummy callbacks for .config_intr() and .ack_interrupt() in the phy header to fix this. Tested on the RTL8366RB on D-Link DIR-685. Fixes: 0d2e778e38e0 ("net: phy: replace PHY_HAS_INTERRUPT with a check for config_intr and ack_interrupt") Cc: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- ChangeLog v1->v2: - Define generic inline helpers for genphy_no_ack_interrupt and genphy_no_config_intr - Add a comment block explaining how interrupts are unmasked and ACKed in the RTL8366RB internal irqchip so it is clear what is going on. --- drivers/net/phy/realtek.c | 7 +++++++ include/linux/phy.h | 8 ++++++++ 2 files changed, 15 insertions(+) -- 2.20.1