linux-kernel - [ 31/53] gpio: Add missing spin_lock

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Date:	Fri, 18 May 2012 03:33:25 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Axel Lin <axel.lin@...il.com>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: [ 31/53] gpio: Add missing spin_lock_init in gpio-ml-ioh driver

3.2.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Axel Lin <axel.lin@...il.com>

commit 7e3a70fb7bccada029c188c89bfbf3c0a63c1500 upstream.

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@...il.com>
Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/gpio/gpio-ml-ioh.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
index 03d6dd5..f0febe5 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) {
-- 
1.7.10



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