linux-kernel - [PATCH] irqchip: ls-extirq: add flag IRQCHIP_SKIP_SET

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Message-Id: <20210127085509.18948-1-biwen.li@oss.nxp.com>
Date:   Wed, 27 Jan 2021 16:55:09 +0800
From:   Biwen Li <biwen.li@....nxp.com>
To:     mark.rutland@....com, leoyang.li@....com, tglx@...utronix.de,
        jason@...edaemon.net, maz@...nel.org
Cc:     linux-kernel@...r.kernel.org, jiafei.pan@....com,
        linux-arm-kernel@...ts.infradead.org, ran.wang_1@....com,
        Biwen Li <biwen.li@....com>
Subject: [PATCH] irqchip: ls-extirq: add flag IRQCHIP_SKIP_SET_WAKE to remove call trace

From: Biwen Li <biwen.li@....com>

Add flag IRQCHIP_SKIP_SET_WAKE to remove call trace as follow,
...
[   45.605239] Unbalanced IRQ 120 wake disable
[   45.609445] WARNING: CPU: 0 PID: 1124 at kernel/irq/manage.c:800 irq_set_irq_wake+0x154/0x1a0
...
[   45.645141] pstate: 60000085 (nZCv daIf -PAN -UAO -TCO BTYPE=--)
[   45.651144] pc : irq_set_irq_wake+0x154/0x1a0
[   45.655497] lr : irq_set_irq_wake+0x154/0x1a0
...
[   45.742825] Call trace:
[   45.745268]  irq_set_irq_wake+0x154/0x1a0
[   45.749278]  ds3232_resume+0x38/0x50

On ls2088ardb:
In suspend progress(# echo mem > /sys/power/state),
pm_suspend()->suspend_devices_and_enter()->dpm_suspend()->device_suspend()
->ds3232_suspend()->enable_irq_wake()->irq_set_irq_wake()
->set_irq_wake_real(), return -ENXIO, there get
"Cannot set wakeup source" in ds3232_suspend().

In resume progress(wakeup by flextimer)
dpm_resume_end()->dpm_resume()
->device_resume()->ds3232_resume()
->disable_irq_wake()->irq_set_irq_wake()
->set_irq_wake_real(), there get
kernel call trace(Unbalanced IRQ 120 wake
disable)

Signed-off-by: Biwen Li <biwen.li@....com>
---
Change in v2:
	- update description

 drivers/irqchip/irq-ls-extirq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-ls-extirq.c b/drivers/irqchip/irq-ls-extirq.c
index 564e6de0bd8e..3c6ed7b4744d 100644
--- a/drivers/irqchip/irq-ls-extirq.c
+++ b/drivers/irqchip/irq-ls-extirq.c
@@ -65,7 +65,7 @@ static struct irq_chip ls_extirq_chip = {
 	.irq_set_type		= ls_extirq_set_type,
 	.irq_retrigger		= irq_chip_retrigger_hierarchy,
 	.irq_set_affinity	= irq_chip_set_affinity_parent,
-	.flags                  = IRQCHIP_SET_TYPE_MASKED,
+	.flags                  = IRQCHIP_SET_TYPE_MASKED | IRQCHIP_SKIP_SET_WAKE,
 };
 
 static int
-- 
2.17.1