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irqchip/loongson-pch-msi: Use bitmap_zalloc() to allocate bitmap 

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: 632dcc2c75 ("irqchip: Add Loongson PCH MSI controller")
Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210209071051.2078435-1-chenhuacai@loongson.cn
This commit is contained in:
Huacai Chen 2021-02-09 15:10:51 +08:00 committed by Marc Zyngier
parent be1abc5ba4
commit c1f664d240
1 changed files with 1 additions and 1 deletions
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2
drivers/irqchip/irq-loongson-pch-msi.c
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@ -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;