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authorFlorian Fainelli <florian@openwrt.org>2009-05-21 17:49:47 (GMT)
committerRalf Baechle <ralf@linux-mips.org>2009-06-17 10:06:27 (GMT)
commitd36773e53f4919627d43b1010df096c5d518a1f5 (patch)
tree11d46cd95681f7e7a04340ec7c966da86e9f0e6b /arch
parent1c99dac8bf0dd5bd1a7600e81d1e5691f7338250 (diff)
downloadlinux-d36773e53f4919627d43b1010df096c5d518a1f5.tar.xz
MIPS: RB532: Check irq number when handling GPIO interrupts
This patch makes sure that we are not going to clear or change the interrupt status of a GPIO interrupt superior to 13 as this is the maximum number of GPIO interrupt source (p.232 of the RC32434 reference manual). Signed-off-by: Florian Fainelli <florian@openwrt.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/rb532/irq.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/mips/rb532/irq.c b/arch/mips/rb532/irq.c
index 53eeb5e..f078820 100644
--- a/arch/mips/rb532/irq.c
+++ b/arch/mips/rb532/irq.c
@@ -151,7 +151,8 @@ static void rb532_disable_irq(unsigned int irq_nr)
mask |= intr_bit;
WRITE_MASK(addr, mask);
- if (group == GPIO_MAPPED_IRQ_GROUP)
+ /* There is a maximum of 14 GPIO interrupts */
+ if (group == GPIO_MAPPED_IRQ_GROUP && irq_nr <= (GROUP4_IRQ_BASE + 13))
rb532_gpio_set_istat(0, irq_nr - GPIO_MAPPED_IRQ_BASE);
/*
@@ -174,7 +175,7 @@ static int rb532_set_type(unsigned int irq_nr, unsigned type)
int gpio = irq_nr - GPIO_MAPPED_IRQ_BASE;
int group = irq_to_group(irq_nr);
- if (group != GPIO_MAPPED_IRQ_GROUP)
+ if (group != GPIO_MAPPED_IRQ_GROUP || irq_nr > (GROUP4_IRQ_BASE + 13))
return (type == IRQ_TYPE_LEVEL_HIGH) ? 0 : -EINVAL;
switch (type) {