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path: root/drivers/char/pc8736x_gpio.c
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Diffstat (limited to 'drivers/char/pc8736x_gpio.c')
-rw-r--r--drivers/char/pc8736x_gpio.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/char/pc8736x_gpio.c b/drivers/char/pc8736x_gpio.c
index ecfaf18..b930de5 100644
--- a/drivers/char/pc8736x_gpio.c
+++ b/drivers/char/pc8736x_gpio.c
@@ -20,6 +20,7 @@
#include <linux/mutex.h>
#include <linux/nsc_gpio.h>
#include <linux/platform_device.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#define DEVNAME "pc8736x_gpio"
@@ -217,6 +218,7 @@ static int pc8736x_gpio_open(struct inode *inode, struct file *file)
unsigned m = iminor(inode);
file->private_data = &pc8736x_gpio_ops;
+ cycle_kernel_lock();
dev_dbg(&pdev->dev, "open %d\n", m);
if (m >= PC8736X_GPIO_CT)
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