multi_usrp_rfnoc: Fix get_device()->get_tree()

Property tree access via the device tree was resulting in a segmentation
fault because the device::_tree member was not properly initialized for
the redirector_device class.  The redirector_device also had a
get_tree() method that was not actually called because the get_tree()
method in the parent class was not declared virtual and all calls to
get_tree() were done on the parent class (i.e. get_device()->get_tree().

- Added initializer for device::_tree member in redirector_device class
  constructor
- Removed redirector_device::get_tree() method

Signed-off-by: michael-west <michael.west@ettus.com>

1 files changed, 3 insertions, 6 deletions

diff --git a/host/lib/usrp/multi_usrp_rfnoc.cpp b/host/lib/usrp/multi_usrp_rfnoc.cpp
index 6d0de68f9..f87e52190 100644
--- a/host/lib/usrp/multi_usrp_rfnoc.cpp
+++ b/host/lib/usrp/multi_usrp_rfnoc.cpp
@@ -74,7 +74,9 @@ constexpr char LOG_ID[]             = "MULTI_USRP";
 class redirector_device : public uhd::device
 {
 public:
-    redirector_device(multi_usrp* musrp_ptr) : _musrp(musrp_ptr) {}
+    redirector_device(multi_usrp* musrp_ptr) : _musrp(musrp_ptr) {
+        _tree = musrp_ptr->get_tree();
+    }
 
     rx_streamer::sptr get_rx_stream(const stream_args_t& args) override
     {
@@ -102,11 +104,6 @@ public:
         return false;
     }
 
-    uhd::property_tree::sptr get_tree(void) const
-    {
-        return _musrp->get_tree();
-    }
-
     device_filter_t get_device_type() const
     {
         return USRP;