[PATCH] thermal: int340x: processor_thermal: Support shared interrupts

From: Srinivas Pandruvada
Date: Wed Jun 19 2024 - 00:44:41 EST


On some systems the processor thermal device interrupt is shared with
other PCI devices. In this case return IRQ_NONE from the interrupt
handler when the interrupt is not for the processor thermal device.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
Fixes: f0658708e863 ("thermal: int340x: processor_thermal: Use non MSI interrupts by default")
Cc: <stable@xxxxxxxxxxxxxxx> # v6.7+
---
This was only observed on a non production system. So not urgent.

.../intel/int340x_thermal/processor_thermal_device_pci.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
index 14e34eabc419..4a1bfebb1b8e 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
@@ -150,7 +150,7 @@ static irqreturn_t proc_thermal_irq_handler(int irq, void *devid)
{
struct proc_thermal_pci *pci_info = devid;
struct proc_thermal_device *proc_priv;
- int ret = IRQ_HANDLED;
+ int ret = IRQ_NONE;
u32 status;

proc_priv = pci_info->proc_priv;
@@ -175,6 +175,7 @@ static irqreturn_t proc_thermal_irq_handler(int irq, void *devid)
/* Disable enable interrupt flag */
proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_INT_ENABLE_0, 0);
pkg_thermal_schedule_work(&pci_info->work);
+ ret = IRQ_HANDLED;
}

pci_write_config_byte(pci_info->pdev, 0xdc, 0x01);
--
2.44.0