b200: explicitly detect libusb timeout

1 files changed, 19 insertions, 8 deletions

diff --git a/host/lib/usrp/b200/b200_iface.cpp b/host/lib/usrp/b200/b200_iface.cpp
index 63f01cea7..2ed4eb9ae 100644
--- a/host/lib/usrp/b200/b200_iface.cpp
+++ b/host/lib/usrp/b200/b200_iface.cpp
@@ -19,6 +19,7 @@
 
 #include <uhd/config.hpp>
 #include <uhd/utils/msg.hpp>
+#include <uhd/utils/log.hpp>
 #include <uhd/exception.hpp>
 #include <boost/functional/hash.hpp>
 #include <boost/thread/thread.hpp>
@@ -301,7 +302,7 @@ public:
     void ad9361_transact(const unsigned char in_buff[64], unsigned char out_buff[64]) {
         const int bytes_to_write = 64;
         const int bytes_to_read = 64;
-        const size_t read_retries = 3;
+        const size_t read_retries = 5;
 
         int ret = fx3_control_write(B200_VREQ_AD9361_CTRL_WRITE, 0x00, 0x00, (unsigned char *)in_buff, bytes_to_write);
         if (ret < 0)
@@ -311,15 +312,25 @@ public:
 
         for (size_t i = 0; i < read_retries; i++)
         {
-            ret = fx3_control_read(B200_VREQ_AD9361_CTRL_READ, 0x00, 0x00, out_buff, bytes_to_read, 5000);
+            ret = fx3_control_read(B200_VREQ_AD9361_CTRL_READ, 0x00, 0x00, out_buff, bytes_to_read, 3000);
             if (ret < 0)
             {
-                UHD_MSG(warning) << (boost::format("Failed to read AD9361 (%d: %s). Retrying (%d of %d)...")
-                    % ret
-                    % libusb_error_name(ret)
-                    % (i+1)
-                    % read_retries)
-                << std::endl;
+                if (ret == LIBUSB_ERROR_TIMEOUT)
+                {
+                    UHD_LOG << (boost::format("Failed to read AD9361 (%d: %s). Retrying (%d of %d)...")
+                            % ret
+                            % libusb_error_name(ret)
+                            % (i+1)
+                            % read_retries
+                        ) << std::endl;
+                }
+                else
+                {
+                    throw uhd::io_error((boost::format("Failed to read AD9361 (%d: %s)")
+                        % ret
+                        % libusb_error_name(ret)
+                    ).str());
+                }
             }
 
             if (ret == bytes_to_read)