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Commit e45d1c80 authored by Linus Walleij's avatar Linus Walleij
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gpio: put GPIO IRQs into their own lock class 



Another feature that is duplicated in a number of GPIO irqchips
is that these cascades IRQs are assigned their own lock class
so as to avoid warnings about lockdep recursions. Do this also
in the generic GPIO irqchip helpers for smooth transition to
this core infrastructure.

Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 1e0d9823

drivers/gpio/gpiolib.c

+7 −0
Original line number Diff line number Diff line
@@ -1377,6 +1377,12 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip, 
}

EXPORT_SYMBOL_GPL(gpiochip_set_chained_irqchip);



/*

 * This lock class tells lockdep that GPIO irqs are in a different

 * category than their parents, so it won't report false recursion.

 */

static struct lock_class_key gpiochip_irq_lock_class;



/**

 * gpiochip_irq_map() - maps an IRQ into a GPIO irqchip

 * @d: the irqdomain used by this irqchip
@@ -1393,6 +1399,7 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, 
	struct gpio_chip *chip = d->host_data;



	irq_set_chip_data(irq, chip);

	irq_set_lockdep_class(irq, &gpiochip_irq_lock_class);

	irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler);

	/* Chips that can sleep need nested thread handlers */

	if (chip->can_sleep)