linux-kernel - [tip: irq/core] genirq/manage: Rework irq_get_irqchip

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Message-ID: <174660883980.406.4109849283258238676.tip-bot2@tip-bot2>
Date: Wed, 07 May 2025 09:07:19 -0000
From: "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org, maz@...nel.org
Subject: [tip: irq/core] genirq/manage: Rework irq_get_irqchip_state()

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

Commit-ID:     782249a997472acec7e8d8f04177750192712a19
Gitweb:        https://git.kernel.org/tip/782249a997472acec7e8d8f04177750192712a19
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Tue, 29 Apr 2025 08:55:52 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Wed, 07 May 2025 09:08:16 +02:00

genirq/manage: Rework irq_get_irqchip_state()

Use the new guards to get and lock the interrupt descriptor and tidy up the
code.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lore.kernel.org/all/20250429065422.612184618@linutronix.de


---
 kernel/irq/manage.c | 22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index fd5fcf3..1783c52 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -2678,24 +2678,14 @@ static int __irq_get_irqchip_state(struct irq_data *data, enum irqchip_irq_state
  * This function should be called with preemption disabled if the interrupt
  * controller has per-cpu registers.
  */
-int irq_get_irqchip_state(unsigned int irq, enum irqchip_irq_state which,
-			  bool *state)
+int irq_get_irqchip_state(unsigned int irq, enum irqchip_irq_state which, bool *state)
 {
-	struct irq_desc *desc;
-	struct irq_data *data;
-	unsigned long flags;
-	int err = -EINVAL;
-
-	desc = irq_get_desc_buslock(irq, &flags, 0);
-	if (!desc)
-		return err;
-
-	data = irq_desc_get_irq_data(desc);
-
-	err = __irq_get_irqchip_state(data, which, state);
+	scoped_irqdesc_get_and_buslock(irq, 0) {
+		struct irq_data *data = irq_desc_get_irq_data(scoped_irqdesc);
 
-	irq_put_desc_busunlock(desc, flags);
-	return err;
+		return __irq_get_irqchip_state(data, which, state);
+	}
+	return -EINVAL;
 }
 EXPORT_SYMBOL_GPL(irq_get_irqchip_state);