gpio: 104-idi-48: Fix missing spin_lock_init for ack_lock

Fixes: 9ae482104cb9 ("gpio: 104-idi-48: Clear pending interrupt once in IRQ handler")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c
index 6c75c83..2d2763e 100644 (file)
--- a/drivers/gpio/gpio-104-idi-48.c
+++ b/drivers/gpio/gpio-104-idi-48.c
@@ -247,6 +247,7 @@ static int idi_48_probe(struct device *dev, unsigned int id)
        idi48gpio->irq = irq[id];
 
        spin_lock_init(&idi48gpio->lock);
+       spin_lock_init(&idi48gpio->ack_lock);
 
        dev_set_drvdata(dev, idi48gpio);