Merge master.kernel.org:/home/rmk/linux-2.6-arm

[sfrench/cifs-2.6.git] / drivers / char / scx200_gpio.c

diff --git a/drivers/char/scx200_gpio.c b/drivers/char/scx200_gpio.c
index be2c623a9862f6cfa80cfe0170acc3ce15e3161c..1d9100561c8a3e70cd4132d153b73164232bb4f4 100644 (file)
--- 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>
 
@@ -46,12 +47,12 @@ struct nsc_gpio_ops scx200_gpio_ops = {
 };
 EXPORT_SYMBOL_GPL(scx200_gpio_ops);
 
-/* No BKL needed here: no global resources used */
 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);