gpio: Add missing spin_lock_init in gpio-ml-ioh driver

This bug was introduced by commit 54be5663
"gpio-ml-ioh: Support interrupt function" which adds a spinlock to struct
ioh_gpio but never init the spinlock.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
index 03d6dd5dcb77..f0febe5b8221 100644
--- a/drivers/gpio/gpio-ml-ioh.c
+++ b/drivers/gpio/gpio-ml-ioh.c
@@ -448,6 +448,7 @@ static int __devinit ioh_gpio_probe(struct pci_dev *pdev,
                 chip->reg = chip->base;
                 chip->ch = i;
                 mutex_init(&chip->lock);
+                spin_lock_init(&chip->spinlock);
                 ioh_gpio_setup(chip, num_ports[i]);
                 ret = gpiochip_add(&chip->gpio);
                 if (ret) {