V4L/DVB (6812): media: video: usbvision: remove ctrlUrbLock

The ctrlUrbLock has all it's users commented out, and so it's unused.  This
patch removes it.
Signed-off-by: NDaniel Walker <dwalker@mvista.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NThierry MERLE <thierry.merle@free.fr>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/usbvision/usbvision-core.c

@@ -1561,13 +1561,10 @@ static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
 	if (len > 8) {
 		return -EFAULT;
 	}
-//	down(&usbvision->ctrlUrbLock);
 	if (usbvision->ctrlUrbBusy) {
-//		up(&usbvision->ctrlUrbLock);
 		return -EBUSY;
 	}
 	usbvision->ctrlUrbBusy = 1;
-//	up(&usbvision->ctrlUrbLock);
 
 	usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
 	usbvision->ctrlUrbSetup.bRequest     = USBVISION_OP_CODE;

drivers/media/video/usbvision/usbvision-video.c

@@ -1651,7 +1651,6 @@ static struct usb_usbvision *usbvision_alloc(struct usb_device *dev)
 		goto err_exit;
 	}
 	init_waitqueue_head(&usbvision->ctrlUrb_wq);
-	init_MUTEX(&usbvision->ctrlUrbLock);	/* to 1 == available */
 
 	usbvision_init_powerOffTimer(usbvision);
 

drivers/media/video/usbvision/usbvision.h

@@ -370,7 +370,6 @@ struct usb_usbvision {
 	int ctrlUrbBusy;
 	struct usb_ctrlrequest ctrlUrbSetup;
 	wait_queue_head_t ctrlUrb_wq;					// Processes waiting
-	struct semaphore ctrlUrbLock;
 
 	/* configuration part */
 	int have_tuner;