printer gadget: BKL pushdown
Add explicit lock_kernel() calls to printer_open()
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index 76be75e..ec8f2eb 100644
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -462,6 +462,7 @@
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 @@
spin_unlock_irqrestore(&dev->lock, flags);
DBG(dev, "printer_open returned %x\n", ret);
-
+ unlock_kernel();
return ret;
}