[PATCH 07/12] soc: fsl: qe: Handle spurious interrupts

From: Paul Louvel <hidden>
Date: 2026-07-03 13:30:58
Also in: linux-arm-kernel, linux-devicetree, linux-gpio, lkml
Reply to: Paul Louvel, 2026-07-03

When no interrupt bits are set in the event register, call
handle_bad_irq() to account for the spurious interrupt before
exiting the cascade handler.

Signed-off-by: Paul Louvel <redacted>
---
 drivers/soc/fsl/qe/qe_ports_ic.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/soc/fsl/qe/qe_ports_ic.c b/drivers/soc/fsl/qe/qe_ports_ic.c
index 27b62f4e3afb..c8b73b0aa233 100644
--- a/drivers/soc/fsl/qe/qe_ports_ic.c
+++ b/drivers/soc/fsl/qe/qe_ports_ic.c

@@ -77,9 +77,15 @@ static void qepic_cascade(struct irq_desc *desc)
 	chained_irq_enter(chip, desc);
 
 	event = in_be32(data->reg + CEPIER);
+	if (!event) {
+		handle_bad_irq(desc);
+		goto out;
+	}
+
 	for_each_set_bit(bit, &event, 32)
 		generic_handle_domain_irq(data->host, 32 - bit);
 
+out:
 	chained_irq_exit(chip, desc);
 }

-- 
2.55.0

Paul Louvel · 2026-07-03
[PATCH 01/12] soc: fsl: qe: Add chained_irq_{enter,exit}() calls in cascade handler · Paul Louvel · 2026-07-03
[PATCH 03/12] dt-bindings: soc: fsl: qe: Convert QE GPIO to DT schema · Paul Louvel · 2026-07-03
Re: [PATCH 03/12] dt-bindings: soc: fsl: qe: Convert QE GPIO to DT schema · Krzysztof Kozlowski · 2026-07-06
Re: [PATCH 03/12] dt-bindings: soc: fsl: qe: Convert QE GPIO to DT schema · Paul Louvel · 2026-07-06
[PATCH 04/12] dt-bindings: soc: fsl: qe: Add support of IRQ in QE GPIO · Paul Louvel · 2026-07-03
Re: [PATCH 04/12] dt-bindings: soc: fsl: qe: Add support of IRQ in QE GPIO · Krzysztof Kozlowski · 2026-07-06
Re: [PATCH 04/12] dt-bindings: soc: fsl: qe: Add support of IRQ in QE GPIO · Paul Louvel · 2026-07-06
Re: [PATCH 04/12] dt-bindings: soc: fsl: qe: Add support of IRQ in QE GPIO · Krzysztof Kozlowski · 2026-07-08
[PATCH 05/12] soc: fsl: qe: Use generic_handle_domain_irq() · Paul Louvel · 2026-07-03
[PATCH 06/12] soc: fsl: qe: Iterate over all pending interrupts in cascade handler · Paul Louvel · 2026-07-03
[PATCH 02/12] dt-bindings: soc: fsl: qe: Set #interrupt-cells to 2 to support interrupt type encoding · Paul Louvel · 2026-07-03
Re: [PATCH 02/12] dt-bindings: soc: fsl: qe: Set #interrupt-cells to 2 to support interrupt type encoding · Krzysztof Kozlowski · 2026-07-08
[PATCH 08/12] soc: fsl: qe: Convert to generic IRQ chip · Paul Louvel · 2026-07-03
Re: [PATCH 08/12] soc: fsl: qe: Convert to generic IRQ chip · Christophe Leroy (CS GROUP) · 2026-07-06
Re: [PATCH 08/12] soc: fsl: qe: Convert to generic IRQ chip · Paul Louvel · 2026-07-06
[PATCH 07/12] soc: fsl: qe: Handle spurious interrupts · Paul Louvel · 2026-07-03
[PATCH 09/12] soc: fsl: qe: Rename irq variable to parent_irq · Paul Louvel · 2026-07-03
[PATCH 11/12] soc: fsl: qe: Remove useless struct member · Paul Louvel · 2026-07-03
[PATCH 10/12] soc: fsl: qe: Rename host member to domain in struct qepic_data · Paul Louvel · 2026-07-03
[PATCH 12/12] soc: fsl: qe: Add support of IRQs in QE GPIO · Paul Louvel · 2026-07-03
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