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gpiolib: cleanup chained handler and data 

Clean up chained handler and handler data if they were set by
gpiochip_set_chained_irqchip().

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Dmitry Eremin-Solenikov 2015-05-12 20:12:23 +03:00 committed by Linus Walleij
parent 845c877009
commit 25e4fe92a2
2 changed files with 8 additions and 0 deletions
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7
drivers/gpio/gpiolib.c
View File

@ -443,6 +443,8 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
*/
irq_set_handler_data(parent_irq, gpiochip);
irq_set_chained_handler(parent_irq, parent_handler);
gpiochip->irq_parent = parent_irq;
}
/* Set the parent IRQ for all affected IRQs */
@ -551,6 +553,11 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
acpi_gpiochip_free_interrupts(gpiochip);
if (gpiochip->irq_parent) {
irq_set_chained_handler(gpiochip->irq_parent, NULL);
irq_set_handler_data(gpiochip->irq_parent, NULL);
}
/* Remove all IRQ mappings and delete the domain */
if (gpiochip->irqdomain) {
for (offset = 0; offset < gpiochip->ngpio; offset++)

1
include/linux/gpio/driver.h
View File

@ -121,6 +121,7 @@ struct gpio_chip {
unsigned int irq_base;
irq_flow_handler_t irq_handler;
unsigned int irq_default_type;
int irq_parent;
#endif
#if defined(CONFIG_OF_GPIO)