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[ARM] 3348/1: Disable GPIO interrupts

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Patch from Andrew Victor

disable_irq() lazily disables the interrupt, so the IRQ is only disabled
once the interrupt occurs again.  The GPIO interrupt handler therefore
must first check disable_depth to see if the IRQ needs to be disabled.

Orignal patch by Bill Gatliff.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Andrew Victor 2006-02-24 22:27:50 +00:00 committed by Russell King
parent f52ee1410d
commit abbea71872
1 changed files with 12 additions and 2 deletions
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14
arch/arm/mach-at91rm9200/gpio.c
View file

@ -274,8 +274,18 @@ static void gpio_irq_handler(unsigned irq, struct irqdesc *desc, struct pt_regs
gpio = &irq_desc[pin];
while (isr) {
if (isr & 1)
gpio->handle(pin, gpio, regs);
if (isr & 1) {
if (unlikely(gpio->disable_depth)) {
/*
* The core ARM interrupt handler lazily disables IRQs so
* another IRQ must be generated before it actually gets
* here to be disabled on the GPIO controller.
*/
gpio_irq_mask(pin);
}
else
gpio->handle(pin, gpio, regs);
}
pin++;
gpio++;
isr >>= 1;