Index: trunk/libffado/src/fireworks/fireworks_device.cpp
===================================================================
--- trunk/libffado/src/fireworks/fireworks_device.cpp (revision 665)
+++ trunk/libffado/src/fireworks/fireworks_device.cpp (revision 668)
@@ -176,4 +176,9 @@
 //     c.showEfcCmd();
 
+    if ( cmd.getResponse() != AVC::AVCCommand::eR_Accepted) {
+        debugError( "EfcOverAVCCmd not accepted\n" );
+        return false;
+    }
+
     if (   c.m_header.retval != EfcCmd::eERV_Ok
         && c.m_header.retval != EfcCmd::eERV_FlashBusy) {
Index: trunk/libffado/src/fireworks/efc/efc_cmds_ioconfig.cpp
===================================================================
--- trunk/libffado/src/fireworks/efc/efc_cmds_ioconfig.cpp (revision 665)
+++ trunk/libffado/src/fireworks/efc/efc_cmds_ioconfig.cpp (revision 668)
@@ -72,5 +72,7 @@
     result &= EfcCmd::deserialize ( de );
 
-    EFC_DESERIALIZE_AND_SWAP(de, &m_value, result);
+    if (m_type == eCT_Get) {
+        EFC_DESERIALIZE_AND_SWAP(de, &m_value, result);
+    }
 
     return result;
Index: trunk/libffado/src/fireworks/efc/efc_cmds_mixer.cpp
===================================================================
--- trunk/libffado/src/fireworks/efc/efc_cmds_mixer.cpp (revision 665)
+++ trunk/libffado/src/fireworks/efc/efc_cmds_mixer.cpp (revision 668)
@@ -85,4 +85,9 @@
         result &= se.write(htonl(m_value), "Value" );
     }
+
+    if(!result) {
+        debugWarning("Serialization failed\n");
+    }
+
     return result;
 }
@@ -95,6 +100,12 @@
     result &= EfcCmd::deserialize ( de );
 
-    EFC_DESERIALIZE_AND_SWAP(de, (quadlet_t *)&m_channel, result);
-    EFC_DESERIALIZE_AND_SWAP(de, &m_value, result);
+    if (m_type == eCT_Get) {
+        EFC_DESERIALIZE_AND_SWAP(de, (quadlet_t *)&m_channel, result);
+        EFC_DESERIALIZE_AND_SWAP(de, &m_value, result);
+    }
+
+    if(!result) {
+        debugWarning("Deserialization failed\n");
+    }
 
     return result;
Index: trunk/libffado/src/fireworks/efc/efc_avc_cmd.cpp
===================================================================
--- trunk/libffado/src/fireworks/efc/efc_avc_cmd.cpp (revision 629)
+++ trunk/libffado/src/fireworks/efc/efc_avc_cmd.cpp (revision 668)
@@ -60,4 +60,8 @@
     result &= m_cmd->serialize( se );
 
+    if(!result) {
+        debugWarning("Serialization failed\n");
+    }
+
     return result;
 }
@@ -78,4 +82,8 @@
     result &= m_cmd->deserialize( de );
     
+    if(!result) {
+        debugWarning("Deserialization failed\n");
+    }
+    
     return result;
 }
Index: trunk/libffado/src/fireworks/efc/efc_cmds_monitor.cpp
===================================================================
--- trunk/libffado/src/fireworks/efc/efc_cmds_monitor.cpp (revision 663)
+++ trunk/libffado/src/fireworks/efc/efc_cmds_monitor.cpp (revision 668)
@@ -130,7 +130,13 @@
     result &= EfcCmd::deserialize ( de );
 
-    EFC_DESERIALIZE_AND_SWAP(de, (quadlet_t *)&m_input, result);
-    EFC_DESERIALIZE_AND_SWAP(de, (quadlet_t *)&m_output, result);
-    EFC_DESERIALIZE_AND_SWAP(de, &m_value, result);
+    if (m_type == eCT_Get) {
+        EFC_DESERIALIZE_AND_SWAP(de, (quadlet_t *)&m_input, result);
+        EFC_DESERIALIZE_AND_SWAP(de, (quadlet_t *)&m_output, result);
+        EFC_DESERIALIZE_AND_SWAP(de, &m_value, result);
+    }
+
+    if(!result) {
+        debugWarning("Deserialization failed\n");
+    }
 
     return result;