X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=drivers%2Fchar%2Fcs5535_gpio.c;h=04ba906b4880eb4337a4d539beb30a29778b97d2;hb=242ab7ad689accafd5e87ffd22b85cf1bf7fbbef;hp=c0a4a0bb509e77397875b023bc4ad4f1324946bf;hpb=a01e035ebb552223c03f2d9138ffc73f2d4d3965;p=cascardo%2Flinux.git

diff --git a/drivers/char/cs5535_gpio.c b/drivers/char/cs5535_gpio.c
index c0a4a0bb509e..04ba906b4880 100644
--- a/drivers/char/cs5535_gpio.c
+++ b/drivers/char/cs5535_gpio.c
@@ -17,6 +17,7 @@
 #include <linux/cdev.h>
 #include <linux/ioport.h>
 #include <linux/pci.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 
@@ -157,6 +158,7 @@ static int cs5535_gpio_open(struct inode *inode, struct file *file)
 {
 	u32 m = iminor(inode);
 
+	cycle_kernel_lock();
 	/* the mask says which pins are usable by this driver */
 	if ((mask & (1 << m)) == 0)
 		return -EINVAL;