Staging: vt6655: fix missing unlock on error in vCommandTimer()

Add the missing unlock on the error handle path in function
vCommandTimer.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/wcmd.c

@@ -412,6 +412,7 @@ vCommandTimer (
 		if (!is_channel_valid(pMgmt->uScanChannel)) {
                     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Invalid channel pMgmt->uScanChannel = %d \n",pMgmt->uScanChannel);
                     s_bCommandComplete(pDevice);
+                    spin_unlock_irq(&pDevice->lock);
                     return;
                 }
 //printk("chester-pMgmt->uScanChannel=%d,pDevice->byMaxChannel=%d\n",pMgmt->uScanChannel,pDevice->byMaxChannel);