mpmd: Skip generation of mb_controller and mb_iface for skip_init=1

The mpmd_mb_controller requires access to the fully functional FPGA,
which in turn assumes flawless initialization. skip_init doesn't init at
all, so inializing an mb_controller may not be possible, and shouldn't
be attempted. This skips init of both mb_iface and mb_controller for
skip_init, leaving it to the other code to figure out if they are
initialized.

1 files changed, 6 insertions, 3 deletions

diff --git a/host/lib/usrp/mpmd/mpmd_mboard_impl.cpp b/host/lib/usrp/mpmd/mpmd_mboard_impl.cpp
index 5c8fd5485..e7bd0cff9 100644
--- a/host/lib/usrp/mpmd/mpmd_mboard_impl.cpp
+++ b/host/lib/usrp/mpmd/mpmd_mboard_impl.cpp
@@ -290,9 +290,12 @@ mpmd_mboard_impl::mpmd_mboard_impl(
         this->dboard_info.push_back(this_db_info);
     }
 
-    // Initialize mb_iface and mb_controller
-    mb_iface = std::make_unique<mpmd_mb_iface>(mb_args, rpc);
-    mb_ctrl = std::make_shared<rfnoc::mpmd_mb_controller>(rpc, device_info);
+    if (!mb_args.has_key("skip_init")) {
+        // Initialize mb_iface and mb_controller
+        mb_iface = std::make_unique<mpmd_mb_iface>(mb_args, rpc);
+        mb_ctrl  = std::make_shared<rfnoc::mpmd_mb_controller>(rpc, device_info);
+    } // Note -- when skip_init is used, these are not initialized, and trying
+      // to use them will result in a null pointer dereference exception!
 }
 
 mpmd_mboard_impl::~mpmd_mboard_impl()