From 2002fbac743b6e2391b4ed50ad9eb626768dd78a Mon Sep 17 00:00:00 2001 From: Michael Walle Date: Tue, 20 Sep 2022 16:16:19 +0200 Subject: [PATCH] net: phy: micrel: fix shared interrupt on LAN8814 Since commit ece19502834d ("net: phy: micrel: 1588 support for LAN8814 phy") the handler always returns IRQ_HANDLED, except in an error case. Before that commit, the interrupt status register was checked and if it was empty, IRQ_NONE was returned. Restore that behavior to play nice with the interrupt line being shared with others. Fixes: ece19502834d ("net: phy: micrel: 1588 support for LAN8814 phy") Signed-off-by: Michael Walle Reviewed-by: Andrew Lunn Reviewed-by: Horatiu Vultur Reviewed-by: Divya Koppera Link: https://lore.kernel.org/r/20220920141619.808117-1-michael@walle.cc Signed-off-by: Jakub Kicinski --- drivers/net/phy/micrel.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index 6f52b4f..38234d7 100644 --- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -2679,16 +2679,19 @@ static int lan8804_config_init(struct phy_device *phydev) static irqreturn_t lan8814_handle_interrupt(struct phy_device *phydev) { int irq_status, tsu_irq_status; + int ret = IRQ_NONE; irq_status = phy_read(phydev, LAN8814_INTS); - if (irq_status > 0 && (irq_status & LAN8814_INT_LINK)) - phy_trigger_machine(phydev); - if (irq_status < 0) { phy_error(phydev); return IRQ_NONE; } + if (irq_status & LAN8814_INT_LINK) { + phy_trigger_machine(phydev); + ret = IRQ_HANDLED; + } + while (1) { tsu_irq_status = lanphy_read_page_reg(phydev, 4, LAN8814_INTR_STS_REG); @@ -2697,12 +2700,15 @@ static irqreturn_t lan8814_handle_interrupt(struct phy_device *phydev) (tsu_irq_status & (LAN8814_INTR_STS_REG_1588_TSU0_ | LAN8814_INTR_STS_REG_1588_TSU1_ | LAN8814_INTR_STS_REG_1588_TSU2_ | - LAN8814_INTR_STS_REG_1588_TSU3_))) + LAN8814_INTR_STS_REG_1588_TSU3_))) { lan8814_handle_ptp_interrupt(phydev); - else + ret = IRQ_HANDLED; + } else { break; + } } - return IRQ_HANDLED; + + return ret; } static int lan8814_ack_interrupt(struct phy_device *phydev) -- 2.7.4