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From: Huacai Chen <chenhuacai@loongson.cn>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Thomas Gleixner <tglx@linutronix.de>,
	Marc Zyngier <maz@kernel.org>
Cc: linux-mips@vger.kernel.org, Jiaxun Yang <jiaxun.yang@flygoat.com>,
	Huacai Chen <chenhuacai@loongson.cn>,
	stable@vger.kernel.org
Subject: [PATCH] irqchip/loongson-pch-msi: Use bitmap_zalloc() to allocate bitmap
Date: Tue,  9 Feb 2021 15:10:51 +0800
Message-ID: <20210209071051.2078435-1-chenhuacai@loongson.cn> (raw)

Currently we use bitmap_alloc() to allocate msi bitmap which should be
initialized with zero. This is obviously wrong but it works because msi
can fallback to legacy interrupt mode. So use bitmap_zalloc() instead.

Fixes: 632dcc2c75ef6de3272aa ("irqchip: Add Loongson PCH MSI controller")
Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
 drivers/irqchip/irq-loongson-pch-msi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-loongson-pch-msi.c b/drivers/irqchip/irq-loongson-pch-msi.c
index 12aeeab43289..32562b7e681b 100644
--- a/drivers/irqchip/irq-loongson-pch-msi.c
+++ b/drivers/irqchip/irq-loongson-pch-msi.c
@@ -225,7 +225,7 @@ static int pch_msi_init(struct device_node *node,
 		goto err_priv;
 	}
 
-	priv->msi_map = bitmap_alloc(priv->num_irqs, GFP_KERNEL);
+	priv->msi_map = bitmap_zalloc(priv->num_irqs, GFP_KERNEL);
 	if (!priv->msi_map) {
 		ret = -ENOMEM;
 		goto err_priv;
-- 
2.27.0


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