printer gadget: BKL pushdown

Add explicit lock_kernel() calls to printer_open()

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

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index 76be75e3ab8f..ec8f2eb041ca 100644
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -462,6 +462,7 @@ printer_open(struct inode *inode, struct file *fd)
         unsigned long           flags;
         int                     ret = -EBUSY;
 
+        lock_kernel();
         dev = container_of(inode->i_cdev, struct printer_dev, printer_cdev);
 
         spin_lock_irqsave(&dev->lock, flags);
@@ -477,7 +478,7 @@ printer_open(struct inode *inode, struct file *fd)
         spin_unlock_irqrestore(&dev->lock, flags);
 
         DBG(dev, "printer_open returned %x\n", ret);
-
+        unlock_kernel();
         return ret;
 }