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From: "Pali Rohár" <pali@kernel.org>
To: Andrew Lunn <andrew@lunn.ch>,
	Gregory Clement <gregory.clement@bootlin.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Marc Zyngier <maz@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] irqchip/armada-370-xp: Do not allow mapping IRQ 0 and 1
Date: Mon, 25 Apr 2022 13:37:06 +0200	[thread overview]
Message-ID: <20220425113706.29310-2-pali@kernel.org> (raw)
In-Reply-To: <20220425113706.29310-1-pali@kernel.org>

IRQs 0 and 1 cannot be mapped, they are handled internally by this driver
and this driver does not call generic_handle_domain_irq() for these IRQs.
So do not allow mapping these IRQs and correctly propagate error from the
.irq_map callback.

Signed-off-by: Pali Rohár <pali@kernel.org>
Cc: stable@vger.kernel.org
---
 drivers/irqchip/irq-armada-370-xp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index 1120084cba09..ebd76ea1c69b 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -546,6 +546,10 @@ static struct irq_chip armada_370_xp_irq_chip = {
 static int armada_370_xp_mpic_irq_map(struct irq_domain *h,
 				      unsigned int virq, irq_hw_number_t hw)
 {
+	/* IRQs 0 and 1 cannot be mapped, they are handled internally */
+	if (hw <= 1)
+		return -EINVAL;
+
 	armada_370_xp_irq_mask(irq_get_irq_data(virq));
 	if (!is_percpu_irq(hw))
 		writel(hw, per_cpu_int_base +
-- 
2.20.1


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WARNING: multiple messages have this Message-ID (diff)
From: "Pali Rohár" <pali@kernel.org>
To: Andrew Lunn <andrew@lunn.ch>,
	Gregory Clement <gregory.clement@bootlin.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Marc Zyngier <maz@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] irqchip/armada-370-xp: Do not allow mapping IRQ 0 and 1
Date: Mon, 25 Apr 2022 13:37:06 +0200	[thread overview]
Message-ID: <20220425113706.29310-2-pali@kernel.org> (raw)
In-Reply-To: <20220425113706.29310-1-pali@kernel.org>

IRQs 0 and 1 cannot be mapped, they are handled internally by this driver
and this driver does not call generic_handle_domain_irq() for these IRQs.
So do not allow mapping these IRQs and correctly propagate error from the
.irq_map callback.

Signed-off-by: Pali Rohár <pali@kernel.org>
Cc: stable@vger.kernel.org
---
 drivers/irqchip/irq-armada-370-xp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index 1120084cba09..ebd76ea1c69b 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -546,6 +546,10 @@ static struct irq_chip armada_370_xp_irq_chip = {
 static int armada_370_xp_mpic_irq_map(struct irq_domain *h,
 				      unsigned int virq, irq_hw_number_t hw)
 {
+	/* IRQs 0 and 1 cannot be mapped, they are handled internally */
+	if (hw <= 1)
+		return -EINVAL;
+
 	armada_370_xp_irq_mask(irq_get_irq_data(virq));
 	if (!is_percpu_irq(hw))
 		writel(hw, per_cpu_int_base +
-- 
2.20.1


  reply	other threads:[~2022-04-25 11:39 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-25 11:37 [PATCH 1/2] irqchip/armada-370-xp: Do not touch Performance Counter Overflow on A375, A38x, A39x Pali Rohár
2022-04-25 11:37 ` Pali Rohár
2022-04-25 11:37 ` Pali Rohár [this message]
2022-04-25 11:37   ` [PATCH 2/2] irqchip/armada-370-xp: Do not allow mapping IRQ 0 and 1 Pali Rohár
2022-04-29 12:30   ` Andrew Lunn
2022-04-29 12:30     ` Andrew Lunn
2022-05-01 12:02     ` Pali Rohár
2022-05-01 12:02       ` Pali Rohár
2022-05-06 11:22   ` Marc Zyngier
2022-05-06 11:22     ` Marc Zyngier
2022-05-06 11:25   ` [irqchip: irq/irqchip-next] " irqchip-bot for Pali Rohár
2022-04-29 12:23 ` [PATCH 1/2] irqchip/armada-370-xp: Do not touch Performance Counter Overflow on A375, A38x, A39x Andrew Lunn
2022-04-29 12:23   ` Andrew Lunn
2022-04-29 13:05   ` Pali Rohár
2022-04-29 13:05     ` Pali Rohár
2022-04-29 22:23     ` Andrew Lunn
2022-04-29 22:23       ` Andrew Lunn
2022-04-29 22:31       ` Pali Rohár
2022-04-29 22:31         ` Pali Rohár
2022-04-29 22:39         ` Andrew Lunn
2022-04-29 22:39           ` Andrew Lunn
2022-05-06 11:25 ` [irqchip: irq/irqchip-next] " irqchip-bot for Pali Rohár

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