usbdev: BKL pushdown

Add explicit lock_kernel() calls to usbdev_open()

Signed-off-by: Jonathan Corbet <corbet@lwn.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index de17738f3acb..9218cca21043 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -565,6 +565,7 @@ static int usbdev_open(struct inode *inode, struct file *file)
         struct dev_state *ps;
         int ret;
 
+        lock_kernel();
         /* Protect against simultaneous removal or release */
         mutex_lock(&usbfs_mutex);
 
@@ -611,6 +612,7 @@ static int usbdev_open(struct inode *inode, struct file *file)
         if (ret)
                 kfree(ps);
         mutex_unlock(&usbfs_mutex);
+        unlock_kernel();
         return ret;
 }