diff options
Diffstat (limited to 'drivers/usb/class/cdc-wdm.c')
| -rw-r--r-- | drivers/usb/class/cdc-wdm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c index 18aafcb08fc8..b75a3d8bb02f 100644 --- a/drivers/usb/class/cdc-wdm.c +++ b/drivers/usb/class/cdc-wdm.c @@ -19,6 +19,7 @@ #include <linux/uaccess.h> #include <linux/bitops.h> #include <linux/poll.h> +#include <linux/smp_lock.h> #include <linux/usb.h> #include <linux/usb/cdc.h> #include <asm/byteorder.h> @@ -516,6 +517,7 @@ static int wdm_open(struct inode *inode, struct file *file) struct usb_interface *intf; struct wdm_device *desc; + lock_kernel(); mutex_lock(&wdm_mutex); intf = usb_find_interface(&wdm_driver, minor); if (!intf) @@ -548,6 +550,7 @@ static int wdm_open(struct inode *inode, struct file *file) usb_autopm_put_interface(desc->intf); out: mutex_unlock(&wdm_mutex); + unlock_kernel(); return rv; } |