staging: vt6656: make spin_lock_irq() human readable

Don't require FIRMWAREbDownload() to, first off, unlock a held lock.
Thus do all locking in main_usb.c and hold it for a insignificantly
shorter period of time. This makes the affected area significantly more
readable though.
Signed-off-by: Martin Kepplinger <martink@posteo.de>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/firmware.c

@@ -55,7 +55,6 @@ int FIRMWAREbDownload(struct vnt_private *pDevice) __must_hold(&pDevice->lock)
 	int ii, rc;
 
 	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->Download firmware\n");
-	spin_unlock_irq(&pDevice->lock);
 
 	rc = request_firmware(&fw, FIRMWARE_NAME, dev);
 	if (rc) {
@@ -92,7 +91,6 @@ int FIRMWAREbDownload(struct vnt_private *pDevice) __must_hold(&pDevice->lock)
 out:
 	kfree(pBuffer);
 
-	spin_lock_irq(&pDevice->lock);
 	return result;
 }
 MODULE_FIRMWARE(FIRMWARE_NAME);

drivers/staging/vt6656/main_usb.c

@@ -319,7 +319,11 @@ static int device_init_registers(struct vnt_private *pDevice)
 	memcpy(pDevice->abySNAP_Bridgetunnel, abySNAP_Bridgetunnel, ETH_ALEN);
 
 	if (!FIRMWAREbCheckVersion(pDevice)) {
+
+		spin_unlock_irq(&pDevice->lock);
 		if (FIRMWAREbDownload(pDevice) == true) {
+
+			spin_lock_irq(&pDevice->lock);
 			if (FIRMWAREbBrach2Sram(pDevice) == false) {
 				DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
 					" FIRMWAREbBrach2Sram fail\n");
@@ -329,7 +333,6 @@ static int device_init_registers(struct vnt_private *pDevice)
 		} else {
 			DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
 				" FIRMWAREbDownload fail\n");
-			spin_unlock_irq(&pDevice->lock);
 			return false;
 		}
 	}