diff options
Diffstat (limited to 'drivers/usb/misc/usblcd.c')
| -rw-r--r-- | drivers/usb/misc/usblcd.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/misc/usblcd.c b/drivers/usb/misc/usblcd.c index 499d7508be9a..90aede90553e 100644 --- a/drivers/usb/misc/usblcd.c +++ b/drivers/usb/misc/usblcd.c @@ -74,10 +74,12 @@ static int lcd_open(struct inode *inode, struct file *file) struct usb_interface *interface; int subminor, r; + lock_kernel(); subminor = iminor(inode); interface = usb_find_interface(&lcd_driver, subminor); if (!interface) { + unlock_kernel(); err ("USBLCD: %s - error, can't find device for minor %d", __func__, subminor); return -ENODEV; @@ -87,6 +89,7 @@ static int lcd_open(struct inode *inode, struct file *file) dev = usb_get_intfdata(interface); if (!dev) { mutex_unlock(&open_disc_mutex); + unlock_kernel(); return -ENODEV; } @@ -98,11 +101,13 @@ static int lcd_open(struct inode *inode, struct file *file) r = usb_autopm_get_interface(interface); if (r < 0) { kref_put(&dev->kref, lcd_delete); + unlock_kernel(); return r; } /* save our object in the file's private structure */ file->private_data = dev; + unlock_kernel(); return 0; } |