linux-kernel - [PATCH V3 3/5] irqchip/loongson-eiointc: Fix registration of syscore

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Message-Id: <20230407083453.6305-4-lvjianmin@loongson.cn>
Date:   Fri,  7 Apr 2023 16:34:51 +0800
From:   Jianmin Lv <lvjianmin@...ngson.cn>
To:     Thomas Gleixner <tglx@...utronix.de>, Marc Zyngier <maz@...nel.org>
Cc:     linux-kernel@...r.kernel.org, loongarch@...ts.linux.dev,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Huacai Chen <chenhuacai@...ngson.cn>,
        loongson-kernel@...ts.loongnix.cn, stable@...r.kernel.org
Subject: [PATCH V3 3/5] irqchip/loongson-eiointc: Fix registration of syscore_ops

When support suspend/resume for loongson-eiointc, the syscore_ops
is registered twice in dual-bridges machines where there are two
eiointc IRQ domains. Repeated registration of an same syscore_ops
broke syscore_ops_list. Also, cpuhp_setup_state_nocalls is only
needed to call for once. So the patch will corret them.

Fixes: a90335c2dfb4 ("irqchip/loongson-eiointc: Add suspend/resume support")
Cc: stable@...r.kernel.org
Signed-off-by: Jianmin Lv <lvjianmin@...ngson.cn>
---
 drivers/irqchip/irq-loongson-eiointc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-loongson-eiointc.c b/drivers/irqchip/irq-loongson-eiointc.c
index d16ed64feb3d..90181c42840b 100644
--- a/drivers/irqchip/irq-loongson-eiointc.c
+++ b/drivers/irqchip/irq-loongson-eiointc.c
@@ -422,10 +422,12 @@ int __init eiointc_acpi_init(struct irq_domain *parent,
 	parent_irq = irq_create_mapping(parent, acpi_eiointc->cascade);
 	irq_set_chained_handler_and_data(parent_irq, eiointc_irq_dispatch, priv);
 
-	register_syscore_ops(&eiointc_syscore_ops);
-	cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_LOONGARCH_STARTING,
+	if (nr_pics == 1) {
+		register_syscore_ops(&eiointc_syscore_ops);
+		cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_LOONGARCH_STARTING,
 				  "irqchip/loongarch/intc:starting",
 				  eiointc_router_init, NULL);
+	}
 
 	if (cpu_has_flatmode)
 		node = cpu_to_node(acpi_eiointc->node * CORES_PER_EIO_NODE);
-- 
2.31.1