[irqchip: irq/irqchip-next] irqchip/loongson-pch-msi: Use bitmap_zalloc() to allocate bitmap

[irqchip-bot for Huacai Chen]

The following commit has been merged into the irq/irqchip-next branch of irqchip:

Commit-ID:     c1f664d2400e73d5ca0fcd067fa5847d2c789c11
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/c1f664d2400e73d5ca0fcd067fa5847d2c789c11
Author:        Huacai Chen <chenhuacai@xxxxxxxxxxx>
AuthorDate:    Tue, 09 Feb 2021 15:10:51 +08:00
Committer:     Marc Zyngier <maz@xxxxxxxxxx>
CommitterDate: Tue, 09 Feb 2021 10:41:40 

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: 632dcc2c75ef6de3272aa ("irqchip: Add Loongson PCH MSI controller")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210209071051.2078435-1-chenhuacai@xxxxxxxxxxx
---
 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 12aeeab..32562b7 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;