linux-kernel - [tip: irq/drivers] irqchip/alpine-msi: Convert to lock guards

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Message-ID: <175155123134.406.9342162435788928180.tip-bot2@tip-bot2>
Date: Thu, 03 Jul 2025 14:00:31 -0000
From: "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>, Nam Cao <namcao@...utronix.de>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: irq/drivers] irqchip/alpine-msi: Convert to lock guards

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

Commit-ID:     71476f915f92cd9fb209f8729d700703ec3c36bc
Gitweb:        https://git.kernel.org/tip/71476f915f92cd9fb209f8729d700703ec3c36bc
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Thu, 26 Jun 2025 16:49:05 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Thu, 03 Jul 2025 15:49:25 +02:00

irqchip/alpine-msi: Convert to lock guards

Convert lock/unlock pairs to guards and tidy up the code.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Nam Cao <namcao@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/all/7886b9595aaf8e102f79364784f68dec9c49b023.1750860131.git.namcao@linutronix.de

---
 drivers/irqchip/irq-alpine-msi.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/irqchip/irq-alpine-msi.c b/drivers/irqchip/irq-alpine-msi.c
index 7e379a6..cf188e5 100644
--- a/drivers/irqchip/irq-alpine-msi.c
+++ b/drivers/irqchip/irq-alpine-msi.c
@@ -60,19 +60,12 @@ static int alpine_msix_allocate_sgi(struct alpine_msix_data *priv, int num_req)
 {
 	int first;
 
-	spin_lock(&priv->msi_map_lock);
-
-	first = bitmap_find_next_zero_area(priv->msi_map, priv->num_spis, 0,
-					   num_req, 0);
-	if (first >= priv->num_spis) {
-		spin_unlock(&priv->msi_map_lock);
+	guard(spinlock)(&priv->msi_map_lock);
+	first = bitmap_find_next_zero_area(priv->msi_map, priv->num_spis, 0, num_req, 0);
+	if (first >= priv->num_spis)
 		return -ENOSPC;
-	}
 
 	bitmap_set(priv->msi_map, first, num_req);
-
-	spin_unlock(&priv->msi_map_lock);
-
 	return priv->spi_first + first;
 }
 
@@ -80,11 +73,8 @@ static void alpine_msix_free_sgi(struct alpine_msix_data *priv, unsigned int sgi
 {
 	int first = sgi - priv->spi_first;
 
-	spin_lock(&priv->msi_map_lock);
-
+	guard(spinlock)(&priv->msi_map_lock);
 	bitmap_clear(priv->msi_map, first, num_req);
-
-	spin_unlock(&priv->msi_map_lock);
 }
 
 static void alpine_msix_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)