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

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Message-ID: <174660885210.406.7025332084240893910.tip-bot2@tip-bot2>
Date: Wed, 07 May 2025 09:07:32 -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_chip_data()

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

Commit-ID:     b3801ddc6883169a2e020dbf06da3723446808ee
Gitweb:        https://git.kernel.org/tip/b3801ddc6883169a2e020dbf06da3723446808ee
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Tue, 29 Apr 2025 08:55:25 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Wed, 07 May 2025 09:08:14 +02:00

genirq/chip: Rework irq_set_chip_data()

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/20250429065421.532308759@linutronix.de


---
 kernel/irq/chip.c | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 13d8c89..2041225 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -115,22 +115,19 @@ int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
 }
 
 /**
- *	irq_set_chip_data - set irq chip data for an irq
- *	@irq:	Interrupt number
- *	@data:	Pointer to chip specific data
+ * irq_set_chip_data - set irq chip data for an irq
+ * @irq:	Interrupt number
+ * @data:	Pointer to chip specific data
  *
- *	Set the hardware irq chip data for an irq
+ * Set the hardware irq chip data for an irq
  */
 int irq_set_chip_data(unsigned int irq, void *data)
 {
-	unsigned long flags;
-	struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
-
-	if (!desc)
-		return -EINVAL;
-	desc->irq_data.chip_data = data;
-	irq_put_desc_unlock(desc, flags);
-	return 0;
+	scoped_irqdesc_get_and_lock(irq, 0) {
+		scoped_irqdesc->irq_data.chip_data = data;
+		return 0;
+	}
+	return -EINVAL;
 }
 EXPORT_SYMBOL(irq_set_chip_data);