3 files changed, 20 insertions, 8 deletions
diff --git a/host/lib/transport/libusb1_zero_copy.cpp b/host/lib/transport/libusb1_zero_copy.cpp
index 1b6712871..6dee69711 100644
--- a/host/lib/transport/libusb1_zero_copy.cpp
+++ b/host/lib/transport/libusb1_zero_copy.cpp
@@ -33,6 +33,11 @@ using namespace uhd::transport;
 static const size_t DEFAULT_NUM_XFERS = 16;     //num xfers
 static const size_t DEFAULT_XFER_SIZE = 32*512; //bytes
 
+//! helper function: handles all async callbacks
+static void libusb_async_cb(libusb_transfer *lut){
+    (*static_cast<boost::function<void()> *>(lut->user_data))();
+}
+
 /***********************************************************************
  * Reusable managed receiver buffer:
  *  - Associated with a particular libusb transfer struct.
@@ -79,7 +84,8 @@ public:
     void commit(size_t len){
         if (_expired) return;
         _lut->length = len;
-        UHD_ASSERT_THROW(libusb_submit_transfer(_lut) == 0);
+        if(len == 0) libusb_async_cb(_lut);
+        else UHD_ASSERT_THROW(libusb_submit_transfer(_lut) == 0);
         _expired = true;
     }
 
@@ -100,11 +106,6 @@ private:
     bool _expired;
 };
 
-//! helper function: handles all async callbacks
-static void libusb_async_cb(libusb_transfer *lut){
-    (*static_cast<boost::function<void()> *>(lut->user_data))();
-}
-
 /***********************************************************************
  * USB zero_copy device class
  **********************************************************************/
diff --git a/host/lib/usrp/usrp1/io_impl.cpp b/host/lib/usrp/usrp1/io_impl.cpp
index 8beeccf8f..b3268298e 100644
--- a/host/lib/usrp/usrp1/io_impl.cpp
+++ b/host/lib/usrp/usrp1/io_impl.cpp
@@ -18,6 +18,7 @@
 #include "../../transport/vrt_packet_handler.hpp"
 #include "usrp_commands.h"
 #include "usrp1_impl.hpp"
+#include <uhd/utils/safe_call.hpp>
 #include <uhd/utils/thread_priority.hpp>
 #include <uhd/transport/bounded_buffer.hpp>
 #include <boost/bind.hpp>
@@ -114,7 +115,7 @@ struct usrp1_impl::io_impl{
     }
 
     ~io_impl(void){
-        flush_send_buff();
+        UHD_SAFE_CALL(flush_send_buff();)
     }
 
     zero_copy_if::sptr data_transport;
diff --git a/host/lib/usrp/usrp1/usrp1_impl.cpp b/host/lib/usrp/usrp1/usrp1_impl.cpp
index caea7c043..7005c59f2 100644
--- a/host/lib/usrp/usrp1/usrp1_impl.cpp
+++ b/host/lib/usrp/usrp1/usrp1_impl.cpp
@@ -19,6 +19,7 @@
 #include "usrp1_ctrl.hpp"
 #include "fpga_regs_standard.h"
 #include "usrp_spi_defs.h"
+#include <uhd/utils/safe_call.hpp>
 #include <uhd/transport/usb_control.hpp>
 #include <uhd/usrp/device_props.hpp>
 #include <uhd/usrp/mboard_props.hpp>
@@ -199,7 +200,16 @@ usrp1_impl::usrp1_impl(uhd::transport::usb_zero_copy::sptr data_transport,
 }
 
 usrp1_impl::~usrp1_impl(void){
-    /* NOP */
+    //Safely destruct all RAII objects in a device.
+    //This prevents the mboard deconstructor from throwing,
+    //which allows the device to be safely deconstructed.
+    BOOST_FOREACH(dboard_slot_t slot, _dboard_slots){
+        UHD_SAFE_CALL(_dboard_managers[slot].reset();)
+        UHD_SAFE_CALL(_dboard_ifaces[slot].reset();)
+        UHD_SAFE_CALL(_codec_ctrls[slot].reset();)
+    }
+    UHD_SAFE_CALL(_clock_ctrl.reset();)
+    UHD_SAFE_CALL(_io_impl.reset();)
 }
 
 bool usrp1_impl::recv_async_msg(uhd::async_metadata_t &, double timeout){