usb: gadget: printer: eliminate file global printer_mutex

The mutex is a legacy after semi-automatic Big Kernel Lock removal.
printer_open() does its own locking, so no need to duplicate it.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/legacy/printer.c b/drivers/usb/gadget/legacy/printer.c
index b7889b1..3206ebc 100644 (file)
--- a/drivers/usb/gadget/legacy/printer.c
+++ b/drivers/usb/gadget/legacy/printer.c
@@ -48,7 +48,6 @@ USB_GADGET_COMPOSITE_OPTIONS();
 #define DRIVER_DESC            "Printer Gadget"
 #define DRIVER_VERSION         "2007 OCT 06"
 
-static DEFINE_MUTEX(printer_mutex);
 static const char shortname [] = "printer";
 static const char driver_desc [] = DRIVER_DESC;
 
@@ -420,7 +419,6 @@ printer_open(struct inode *inode, struct file *fd)
        unsigned long           flags;
        int                     ret = -EBUSY;
 
-       mutex_lock(&printer_mutex);
        dev = container_of(inode->i_cdev, struct printer_dev, printer_cdev);
 
        spin_lock_irqsave(&dev->lock, flags);
@@ -436,7 +434,6 @@ printer_open(struct inode *inode, struct file *fd)
        spin_unlock_irqrestore(&dev->lock, flags);
 
        DBG(dev, "printer_open returned %x\n", ret);
-       mutex_unlock(&printer_mutex);
        return ret;
 }