diff --git a/app/HGProductionTool/mainwindow.cpp b/app/HGProductionTool/mainwindow.cpp
index ff4b43c..c5fc2eb 100644
--- a/app/HGProductionTool/mainwindow.cpp
+++ b/app/HGProductionTool/mainwindow.cpp
@@ -82,9 +82,10 @@ MainWindow::~MainWindow()
     sane_exit();
 
     HGPdtToolDb_DestroyUserMgr(m_pdtToolDbuserMgr);
-    m_pdtToolDbuserMgr = NULL;
+    m_pdtToolDbuserMgr = nullptr;
 
     HGBase_DestroyLock(m_lock);
+    m_lock = nullptr;
     delete ui;
 }
 
@@ -232,29 +233,26 @@ int MainWindow::sane_ex_callback(SANE_Handle hdev, int code, void *data, unsigne
     {
         SANE_Device_Ex* sane_dev = (SANE_Device_Ex*)data;
         emit p->sane_dev_arrive(sane_dev->name);
-        return 0;
     }
     else if (SANE_EVENT_DEVICE_LEFT == code)
     {
         SANE_Device* sane_dev = (SANE_Device*)data;
         emit p->sane_dev_remove(sane_dev->name);
-        return 0;
     }
 
-    if (!hdev)
+    if (code == SANE_EVENT_STATUS || code == SANE_EVENT_ERROR || code == SANE_EVENT_WORKING
+            || code == SANE_EVENT_IMAGE_OK || code == SANE_EVENT_SCAN_FINISHED)
     {
-        return -1;
+        HGBase_EnterLock(p->m_lock);
+        Form_mainInterface* interface = p->FindInterface(hdev);
+        if (nullptr != interface)
+        {
+            if (nullptr != interface->getScanner() && nullptr != interface->getScanner()->cb_)
+                interface->getScanner()->cb_(hdev, code, data, len, interface->getScanner());
+        }
+        HGBase_LeaveLock(p->m_lock);
     }
 
-    HGBase_EnterLock(p->m_lock);
-    Form_mainInterface* interface = p->FindInterface(hdev);
-    if (nullptr != interface)
-    {
-        if (nullptr != interface->getScanner() && nullptr != interface->getScanner()->cb_)
-            interface->getScanner()->cb_(hdev, code, data, len, interface->getScanner());
-    }
-    HGBase_LeaveLock(p->m_lock);
-
     return 0;
 }
 
diff --git a/db/HGPdtToolDb/HGPdtToolDbImpl.cpp b/db/HGPdtToolDb/HGPdtToolDbImpl.cpp
index 16390da..4d45f44 100644
--- a/db/HGPdtToolDb/HGPdtToolDbImpl.cpp
+++ b/db/HGPdtToolDb/HGPdtToolDbImpl.cpp
@@ -87,7 +87,7 @@ HGResult HGPdtToolDbUserMgrImpl::Create(const HGChar* host, HGUShort port, const
 	}
 
 	unsigned int timeout = 2;
-	mysql_options(sql, MYSQL_OPT_CONNECT_TIMEOUT, (const char*)&timeout);
+	mysql_options(sql, MYSQL_OPT_CONNECT_TIMEOUT, &timeout);
 
 	if (NULL == mysql_real_connect(sql, host, "huago", "huago", "huago_production_tool", port, NULL, 0))
 	{