Commit abbea718 authored Feb 24, 2006 by Andrew Victor Committed by Russell King Feb 24, 2006

[ARM] 3348/1: Disable GPIO interrupts



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>

parent f52ee141

arch/arm/mach-at91rm9200/gpio.c

+12 −2

Original line number	Diff line number	Diff line
		@@ -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)
		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;