From f6da9fe45c3074b909084ae9da5f55034ebffeb4 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 15 Apr 2014 10:28:04 +0200 Subject: [PATCH] irqchip: vic: Properly chain the cascaded IRQs We are flagging the parent IRQ as chained, then we must also make sure to call the chained_irq_[enter|exit] functions for things to work smoothly. Signed-off-by: Linus Walleij Link: http://lkml.kernel.org/r/1397550484-7119-1-git-send-email-linus.walleij@linaro.org Signed-off-by: Thomas Gleixner --- drivers/irqchip/irq-vic.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/irqchip/irq-vic.c b/drivers/irqchip/irq-vic.c index 37dab0b472cd..7d35287f9e90 100644 --- a/drivers/irqchip/irq-vic.c +++ b/drivers/irqchip/irq-vic.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -228,12 +229,17 @@ static int handle_one_vic(struct vic_device *vic, struct pt_regs *regs) static void vic_handle_irq_cascaded(unsigned int irq, struct irq_desc *desc) { u32 stat, hwirq; + struct irq_chip *host_chip = irq_desc_get_chip(desc); struct vic_device *vic = irq_desc_get_handler_data(desc); + chained_irq_enter(host_chip, desc); + while ((stat = readl_relaxed(vic->base + VIC_IRQ_STATUS))) { hwirq = ffs(stat) - 1; generic_handle_irq(irq_find_mapping(vic->domain, hwirq)); } + + chained_irq_exit(host_chip, desc); } /*