From 1d1e5630de78f7253ac24b92cee6427c3ff04d56 Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Fri, 11 Sep 2020 18:26:18 +0800 Subject: [PATCH] irqchip/loongson-htvec: Fix initial interrupt clearing In htvec_reset() only the first group of initial interrupts is cleared. This sometimes causes spurious interrupts, so let's clear all groups. While at it, fix the nearby comment that to match the reality of what the driver does. Fixes: 818e915fbac518e8c78e1877 ("irqchip: Add Loongson HyperTransport Vector support") Signed-off-by: Huacai Chen Signed-off-by: Marc Zyngier Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/1599819978-13999-2-git-send-email-chenhc@lemote.com --- drivers/irqchip/irq-loongson-htvec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/irqchip/irq-loongson-htvec.c b/drivers/irqchip/irq-loongson-htvec.c index 13e6016fe4646..6392aafb9a631 100644 --- a/drivers/irqchip/irq-loongson-htvec.c +++ b/drivers/irqchip/irq-loongson-htvec.c @@ -151,7 +151,7 @@ static void htvec_reset(struct htvec *priv) /* Clear IRQ cause registers, mask all interrupts */ for (idx = 0; idx < priv->num_parents; idx++) { writel_relaxed(0x0, priv->base + HTVEC_EN_OFF + 4 * idx); - writel_relaxed(0xFFFFFFFF, priv->base); + writel_relaxed(0xFFFFFFFF, priv->base + 4 * idx); } } @@ -172,7 +172,7 @@ static int htvec_of_init(struct device_node *node, goto free_priv; } - /* Interrupt may come from any of the 4 interrupt line */ + /* Interrupt may come from any of the 8 interrupt lines */ for (i = 0; i < HTVEC_MAX_PARENT_IRQ; i++) { parent_irq[i] = irq_of_parse_and_map(node, i); if (parent_irq[i] <= 0) -- 2.30.2