From 4195441e3c6eaa3a118804dd9d8d04e5d3fe2149 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@gmail.com>
Date: Wed, 1 Feb 2012 10:51:53 +0800
Subject: [PATCH] gpio: Add missing spin_lock_init in gpio-pch driver

commit d166370ad86b33b1111af3a0cdd7de94e03789a6 upstream.

This bug was introduced by commit d568a681
"gpio-pch: add spinlock in suspend/resume processing"
which adds a spinlock to struct pch_gpio but never init the spinlock.

Reported-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpio/gpio-pch.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c
index eb574f2c5a92..779ff7067b62 100644
--- a/drivers/gpio/gpio-pch.c
+++ b/drivers/gpio/gpio-pch.c
@@ -392,6 +392,7 @@ static int __devinit pch_gpio_probe(struct pci_dev *pdev,
 	chip->reg = chip->base;
 	pci_set_drvdata(pdev, chip);
 	mutex_init(&chip->lock);
+	spin_lock_init(&chip->spinlock);
 	pch_gpio_setup(chip);
 	ret = gpiochip_add(&chip->gpio);
 	if (ret) {
-- 
2.39.5