On the Loongson platform, each node is equipped with a security engine
device. However, due to a hardware flaw, only the device on node 0 can
trigger interrupts. Therefore, interrupts from other nodes are forwarded
by node 0. We need to check in the interrupt handler of node 0 whether
this interrupt is intended for other nodes, this can be accomplished via
shared interrupt handling.
Signed-off-by: Qunqin Zhao <zhaoqunqin@loongson.cn>
---
V3:
Using shared interrupts (IRQF_SHARED) instead of manually
iterating through all devices to check for interrupts.
Link to v2:
https://lore.kernel.org/all/20260427165133.23350-1-zhaoqunqin@loongson.cn/
drivers/mfd/loongson-se.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mfd/loongson-se.c b/drivers/mfd/loongson-se.c
index 3902ba377d6..e63ea40d5db 100644
--- a/drivers/mfd/loongson-se.c
+++ b/drivers/mfd/loongson-se.c
@@ -219,7 +219,7 @@ static int loongson_se_probe(struct platform_device *pdev)
for (i = 0; i < nr_irq; i++) {
irq = platform_get_irq(pdev, i);
- err = devm_request_irq(dev, irq, se_irq_handler, 0, "loongson-se", se);
+ err = devm_request_irq(dev, irq, se_irq_handler, IRQF_SHARED, "loongson-se", se);
if (err)
dev_err(dev, "failed to request IRQ: %d\n", irq);
}
@@ -228,7 +228,7 @@ static int loongson_se_probe(struct platform_device *pdev)
if (err)
return err;
- return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, engines,
+ return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, engines,
ARRAY_SIZE(engines), NULL, 0, NULL);
}
base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731
--
2.47.2