linux-kernel - [tip: irq/core] genirq/chip: Rework irq_set_irq

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Message-ID: <174660885411.406.16646641237641068739.tip-bot2@tip-bot2>
Date: Wed, 07 May 2025 09:07:34 -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/chip: Rework irq_set_irq_type()

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

Commit-ID:     fa870e0f3551cfff90c7d0261e8f208a83097946
Gitweb:        https://git.kernel.org/tip/fa870e0f3551cfff90c7d0261e8f208a83097946
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Tue, 29 Apr 2025 08:55:20 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Wed, 07 May 2025 09:08:13 +02:00

genirq/chip: Rework irq_set_irq_type()

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

Fixup the kernel doc comment while at it.

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/20250429065421.355673840@linutronix.de


---
 kernel/irq/chip.c | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 92bf81a..0904886 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -54,22 +54,15 @@ int irq_set_chip(unsigned int irq, const struct irq_chip *chip)
 EXPORT_SYMBOL(irq_set_chip);
 
 /**
- *	irq_set_irq_type - set the irq trigger type for an irq
- *	@irq:	irq number
- *	@type:	IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
+ * irq_set_irq_type - set the irq trigger type for an irq
+ * @irq:	irq number
+ * @type:	IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
  */
 int irq_set_irq_type(unsigned int irq, unsigned int type)
 {
-	unsigned long flags;
-	struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
-	int ret = 0;
-
-	if (!desc)
-		return -EINVAL;
-
-	ret = __irq_set_trigger(desc, type);
-	irq_put_desc_busunlock(desc, flags);
-	return ret;
+	scoped_irqdesc_get_and_buslock(irq, IRQ_GET_DESC_CHECK_GLOBAL)
+		return __irq_set_trigger(scoped_irqdesc, type);
+	return -EINVAL;
 }
 EXPORT_SYMBOL(irq_set_irq_type);