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>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 2c1e639f66bd..96a678842cde 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -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)