X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fchar%2Fscx200_gpio.c;h=1d9100561c8a3e70cd4132d153b73164232bb4f4;hb=9ea319b61613085f501a79cf8d405cb221d084f3;hp=99e5272e3c53e1ef1aa32f0733b1bbf0e9f2487e;hpb=f0eef25339f92f7cd4aeea23d9ae97987a5a1e82;p=linux-2.6

diff --git a/drivers/char/scx200_gpio.c b/drivers/char/scx200_gpio.c
index 99e5272e3c..1d9100561c 100644
--- a/drivers/char/scx200_gpio.c
+++ b/drivers/char/scx200_gpio.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 
@@ -51,6 +52,7 @@ static int scx200_gpio_open(struct inode *inode, struct file *file)
 	unsigned m = iminor(inode);
 	file->private_data = &scx200_gpio_ops;
 
+	cycle_kernel_lock();
 	if (m >= MAX_PINS)
 		return -EINVAL;
 	return nonseekable_open(inode, file);