diff options
Diffstat (limited to 'drivers/usb/class/usbtmc.c')
| -rw-r--r-- | drivers/usb/class/usbtmc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c index 8588c0937a8..426bfc72b9b 100644 --- a/drivers/usb/class/usbtmc.c +++ b/drivers/usb/class/usbtmc.c @@ -26,6 +26,7 @@ #include <linux/uaccess.h> #include <linux/kref.h> #include <linux/mutex.h> +#include <linux/smp_lock.h> #include <linux/usb.h> #include <linux/usb/tmc.h> @@ -113,6 +114,7 @@ static int usbtmc_open(struct inode *inode, struct file *filp) struct usbtmc_device_data *data; int retval = 0; + lock_kernel(); intf = usb_find_interface(&usbtmc_driver, iminor(inode)); if (!intf) { printk(KERN_ERR KBUILD_MODNAME @@ -128,6 +130,7 @@ static int usbtmc_open(struct inode *inode, struct file *filp) filp->private_data = data; exit: + unlock_kernel(); return retval; } |