From f9ce4a4a8ed0d5ead686ea3313349489dab6bedd Mon Sep 17 00:00:00 2001
From: Drew Galbraith <dgalbraith33@gmail.com>
Date: Sat, 25 Nov 2023 13:06:14 -0800
Subject: [PATCH] [Zion] Don't ignore DriverManager Register return code.

---
 zion/interrupt/driver_manager.h | 3 ++-
 zion/syscall/ipc.cpp            | 4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/zion/interrupt/driver_manager.h b/zion/interrupt/driver_manager.h
index c2ad11b..db205c8 100644
--- a/zion/interrupt/driver_manager.h
+++ b/zion/interrupt/driver_manager.h
@@ -15,7 +15,8 @@ class DriverManager {
 
   void WriteMessage(uint64_t irq_num, IpcMessage&& message);
 
-  glcr::ErrorCode RegisterListener(uint64_t irq_num, glcr::RefPtr<Port> port);
+  [[nodiscard]] glcr::ErrorCode RegisterListener(uint64_t irq_num,
+                                                 glcr::RefPtr<Port> port);
 
  private:
   glcr::HashMap<uint64_t, glcr::RefPtr<Port>> driver_map_;
diff --git a/zion/syscall/ipc.cpp b/zion/syscall/ipc.cpp
index e18f84a..a49e1ed 100644
--- a/zion/syscall/ipc.cpp
+++ b/zion/syscall/ipc.cpp
@@ -160,9 +160,9 @@ glcr::ErrorCode IrqRegister(ZIrqRegisterReq* req) {
   auto& proc = gScheduler->CurrentProcess();
 
   glcr::RefPtr<Port> port = glcr::MakeRefCounted<Port>();
+
   *req->port_cap = proc.AddNewCapability(port);
-  DriverManager::Get().RegisterListener(req->irq_num, port);
-  return glcr::OK;
+  return DriverManager::Get().RegisterListener(req->irq_num, port);
 }
 
 glcr::ErrorCode EndpointCreate(ZEndpointCreateReq* req) {