lib: disable non pcie types in find with resource

mpmd find doesn't respect the "resource" arg hint and can be detected
when "resource" is set. This results in incorrect device selection when
using PCIe. This change adds detection for "resource" as a prefix
in the device hints for mpmd and the other devices.

1 files changed, 4 insertions, 2 deletions

diff --git a/host/lib/usrp/x300/x300_impl.cpp b/host/lib/usrp/x300/x300_impl.cpp
index fa8425fac..663b951a1 100644
--- a/host/lib/usrp/x300/x300_impl.cpp
+++ b/host/lib/usrp/x300/x300_impl.cpp
@@ -100,7 +100,9 @@ device_addrs_t x300_find(const device_addr_t& hint_)
         return reply_addrs;
     }
 
-    if (!hint.has_key("resource")) {
+    bool has_resource_key = hint.has_key_with_prefix("resource");
+
+    if (!has_resource_key) {
         // otherwise, no address was specified, send a broadcast on each interface
         for (const transport::if_addrs_t& if_addrs : transport::get_if_addrs()) {
             // avoid the loopback device
@@ -135,7 +137,7 @@ device_addrs_t x300_find(const device_addr_t& hint_)
         }
     }
 
-    device_addrs_t pcie_addrs = pcie_manager::find(hint, hint.has_key("resource"));
+    device_addrs_t pcie_addrs = pcie_manager::find(hint, has_resource_key);
     if (not pcie_addrs.empty()) {
         addrs.insert(addrs.end(), pcie_addrs.begin(), pcie_addrs.end());
     }