From: Huacai Chen chenhuacai@loongson.cn
commit c1f664d2400e73d5ca0fcd067fa5847d2c789c11 upstream.
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 Signed-off-by: Marc Zyngier maz@kernel.org Link: https://lore.kernel.org/r/20210209071051.2078435-1-chenhuacai@loongson.cn Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/irqchip/irq-loongson-pch-msi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- 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_no 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;