1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/char/pc8736x_gpio.c b/drivers/char/pc8736x_gpio.c
index ecfaf180e5bd..b930de50407a 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)