linux-kernel - [PATCH 1/2] linux/interrupt.h: allow "guard" notation to disable and reenable IRQ with valid IRQ check

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Message-ID: <20260121232522.154771-1-marek.vasut+renesas@mailbox.org>
Date: Thu, 22 Jan 2026 00:23:47 +0100
From: Marek Vasut <marek.vasut+renesas@...lbox.org>
To: linux-input@...r.kernel.org
Cc: Marek Vasut <marek.vasut+renesas@...lbox.org>,
	"Peter Zijlstra (Intel)" <peterz@...radead.org>,
	Cheng-Yang Chou <yphbchou0911@...il.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Frank Li <Frank.Li@....com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Jinjie Ruan <ruanjinjie@...wei.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>,
	Marc Zyngier <maz@...nel.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Thomas Gleixner <tglx@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org
Subject: [PATCH 1/2] linux/interrupt.h: allow "guard" notation to disable and reenable IRQ with valid IRQ check

Introduce disable_valid_irq scoped guard. This is an extension
of disable_irq scoped guard, which disables and enables IRQs
around a scope. The disable_valid_irq scoped guard does almost
the same, except it handles the case where IRQ is not valid,
in which case it does not do anything. This is meant to be used
by for example touch controller drivers, which can do both IRQ
driven and polling mode of operation, and this makes their code
slighly simpler.

Signed-off-by: Marek Vasut <marek.vasut+renesas@...lbox.org>
---
Cc: "Peter Zijlstra (Intel)" <peterz@...radead.org>
Cc: Cheng-Yang Chou <yphbchou0911@...il.com>
Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Frank Li <Frank.Li@....com>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Jinjie Ruan <ruanjinjie@...wei.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
Cc: Marc Zyngier <maz@...nel.org>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Thomas Gleixner <tglx@...nel.org>
Cc: linux-input@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-renesas-soc@...r.kernel.org
---
 include/linux/interrupt.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 00c01b0a43be1..becbeab4a7473 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -242,6 +242,21 @@ extern void irq_wake_thread(unsigned int irq, void *dev_id);
 DEFINE_LOCK_GUARD_1(disable_irq, int,
 		    disable_irq(*_T->lock), enable_irq(*_T->lock))
 
+static inline void disable_valid_irq(unsigned int irq)
+{
+	if (irq > 0)
+		disable_irq(irq);
+}
+
+static inline void enable_valid_irq(unsigned int irq)
+{
+	if (irq > 0)
+		enable_irq(irq);
+}
+
+DEFINE_LOCK_GUARD_1(disable_valid_irq, int,
+		    disable_valid_irq(*_T->lock), enable_valid_irq(*_T->lock))
+
 extern void disable_nmi_nosync(unsigned int irq);
 extern void disable_percpu_nmi(unsigned int irq);
 extern void enable_nmi(unsigned int irq);
-- 
2.51.0