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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 <linus.walleij@linaro.org>
Link: http://lkml.kernel.org/r/1397550484-7119-1-git-send-email-linus.walleij@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Linus Walleij 2014-04-15 10:28:04 +02:00 committed by Thomas Gleixner
parent 55101e2d6c
commit f6da9fe45c
1 changed files with 6 additions and 0 deletions
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6
drivers/irqchip/irq-vic.c
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@ -24,6 +24,7 @@
#include <linux/list.h> #include <linux/list.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/irq.h> #include <linux/irq.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h> #include <linux/irqdomain.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_address.h> #include <linux/of_address.h>
@ -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) static void vic_handle_irq_cascaded(unsigned int irq, struct irq_desc *desc)
{ {
u32 stat, hwirq; u32 stat, hwirq;
struct irq_chip *host_chip = irq_desc_get_chip(desc);
struct vic_device *vic = irq_desc_get_handler_data(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))) { while ((stat = readl_relaxed(vic->base + VIC_IRQ_STATUS))) {
hwirq = ffs(stat) - 1; hwirq = ffs(stat) - 1;
generic_handle_irq(irq_find_mapping(vic->domain, hwirq)); generic_handle_irq(irq_find_mapping(vic->domain, hwirq));
} }
chained_irq_exit(host_chip, desc);
} }
/* /*