summaryrefslogtreecommitdiffstats
path: root/drivers/usb/misc/adutux.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/misc/adutux.c')
-rw-r--r--drivers/usb/misc/adutux.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/misc/adutux.c b/drivers/usb/misc/adutux.c
index 306e97825b36..ac8ad91c2dac 100644
--- a/drivers/usb/misc/adutux.c
+++ b/drivers/usb/misc/adutux.c
@@ -25,6 +25,7 @@
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/mutex.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#ifdef CONFIG_USB_DEBUG
@@ -274,6 +275,7 @@ static int adu_open(struct inode *inode, struct file *file)
dbg(2,"%s : enter", __func__);
+ lock_kernel();
subminor = iminor(inode);
if ((retval = mutex_lock_interruptible(&adutux_mutex))) {
@@ -332,6 +334,7 @@ static int adu_open(struct inode *inode, struct file *file)
exit_no_device:
mutex_unlock(&adutux_mutex);
exit_no_lock:
+ unlock_kernel();
dbg(2,"%s : leave, return value %d ", __func__, retval);
return retval;
}