linux-kernel - [tip: irq/core] platform/x86: intel_int0002_vgpio: Use generic_handle_irq

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Date:   Mon, 19 Sep 2022 13:25:50 -0000
From:   "tip-bot2 for Sebastian Andrzej Siewior" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org, maz@...nel.org
Subject: [tip: irq/core] platform/x86: intel_int0002_vgpio: Use
 generic_handle_irq_safe()

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     c6a91405ac5cd5baa03fea061e11b05788223160
Gitweb:        https://git.kernel.org/tip/c6a91405ac5cd5baa03fea061e11b05788223160
Author:        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
AuthorDate:    Mon, 19 Sep 2022 14:44:28 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Mon, 19 Sep 2022 15:08:38 +02:00

platform/x86: intel_int0002_vgpio: Use generic_handle_irq_safe()

On PREEMPT_RT enabled kernels the demultiplex interrupt handler is force
threaded and runs with interrupts enabled. The invocation of
generic_handle_irq() with interrupts enabled triggers a lockdep warning due
to a non-irq safe lock acquisition.

Instead of disabling interrupts on the driver level, use
generic_handle_domain_irq_safe().

[ tglx: Split out from combo patch ]

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/r/YnkfWFzvusFFktSt@linutronix.de
---
 drivers/platform/x86/intel/int0002_vgpio.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/platform/x86/intel/int0002_vgpio.c b/drivers/platform/x86/intel/int0002_vgpio.c
index 617dbf9..97cfbc5 100644
--- a/drivers/platform/x86/intel/int0002_vgpio.c
+++ b/drivers/platform/x86/intel/int0002_vgpio.c
@@ -125,8 +125,7 @@ static irqreturn_t int0002_irq(int irq, void *data)
 	if (!(gpe_sts_reg & GPE0A_PME_B0_STS_BIT))
 		return IRQ_NONE;
 
-	generic_handle_irq(irq_find_mapping(chip->irq.domain,
-					    GPE0A_PME_B0_VIRT_GPIO_PIN));
+	generic_handle_domain_irq_safe(chip->irq.domain, GPE0A_PME_B0_VIRT_GPIO_PIN);
 
 	pm_wakeup_hard_event(chip->parent);