DevMgr:attachAllUnattachedDevicesFromKnownListReq: acquire qutex

We should acquire the qutex here before iterating through the list
of DA specs.

smocore/deviceManager/deviceManager.cpp

@@ -623,37 +623,92 @@ void DeviceManager::attachAllUnattachedDevicesFromCmdlineReq(
 	attachAllUnattachedDevicesFromReq(specs, std::move(cb));
 }
 
+class DeviceManager::AttachAllUnattachedDevicesFromKnownListReq
+:	public SerializedAsynchronousContinuation<
+		attachAllUnattachedDevicesFromReqCbFn>
+{
+public:
+	AttachAllUnattachedDevicesFromKnownListReq(
+		const std::shared_ptr<ComponentThread> &caller,
+		Callback<attachAllUnattachedDevicesFromReqCbFn> cb,
+		std::vector<std::reference_wrapper<Qutex>> requiredLocks)
+	:	SerializedAsynchronousContinuation<
+			attachAllUnattachedDevicesFromReqCbFn>(
+			caller, cb, requiredLocks)
+	{}
+
+public:
+	void attachAllUnattachedDevicesFromKnownListReq1_posted(
+		[[maybe_unused]]
+		std::shared_ptr<AttachAllUnattachedDevicesFromKnownListReq> context
+		)
+	{
+		// Create a vector to hold unattached device specs
+		auto unattachedSpecs = std::make_shared<
+			std::vector<DeviceAttachmentSpec>>();
+
+		// Cycle through all DA specs in deviceAttachmentSpecs
+		for (const auto& spec : DeviceManager::deviceAttachmentSpecs)
+		{
+			bool isAttached = false;
+
+			// Cross reference with attachedDeviceRoles
+			for (const auto& role : DeviceManager::attachedDeviceRoles)
+			{
+				if (*role->deviceAttachmentSpec == *spec)
+				{
+					isAttached = true;
+					break;
+				}
+			}
+
+			// If spec doesn't appear in attachedDeviceRoles, add it to vector
+			if (!isAttached) {
+				unattachedSpecs->push_back(*spec);
+			}
+		}
+
+		// Release the DeviceManager qutex early before calling the inner method
+		DeviceManager::getInstance().qutex.release();
+
+		// Pass the vector to the existing function
+		DeviceManager::getInstance().attachAllUnattachedDevicesFromReq(
+			unattachedSpecs,
+			{context, std::bind(
+				&AttachAllUnattachedDevicesFromKnownListReq
+					::attachAllUnattachedDevicesFromKnownListReq2,
+				context.get(), context,
+				std::placeholders::_1)});
+	}
+
+	void attachAllUnattachedDevicesFromKnownListReq2(
+		[[maybe_unused]]
+		std::shared_ptr<AttachAllUnattachedDevicesFromKnownListReq> context,
+		AsynchronousLoop loop
+		)
+	{
+		callOriginalCb(loop);
+	}
+};
+
 void DeviceManager::attachAllUnattachedDevicesFromKnownListReq(
 	Callback<attachAllUnattachedDevicesFromReqCbFn> cb
 	)
 {
-	// Create a vector to hold unattached device specs
-	auto unattachedSpecs = std::make_shared<
-		std::vector<DeviceAttachmentSpec>>();
+	const auto& caller = ComponentThread::getSelf();
+	
+	auto request = std::make_shared<AttachAllUnattachedDevicesFromKnownListReq>(
+		caller, cb,
+		LockSet<attachAllUnattachedDevicesFromReqCbFn>::Set{
+			std::ref(DeviceManager::getInstance().qutex)
+		});
 
-	// Cycle through all DA specs in deviceAttachmentSpecs
-	for (const auto& spec : deviceAttachmentSpecs)
-	{
-		bool isAttached = false;
-
-		// Cross reference with attachedDeviceRoles
-		for (const auto& role : attachedDeviceRoles)
-		{
-			if (*role->deviceAttachmentSpec == *spec)
-			{
-				isAttached = true;
-				break;
-			}
-		}
-
-		// If spec doesn't appear in attachedDeviceRoles, add it to the vector
-		if (!isAttached) {
-			unattachedSpecs->push_back(*spec);
-		}
-	}
-
-	// Pass the vector to the existing function
-	attachAllUnattachedDevicesFromReq(unattachedSpecs, std::move(cb));
+	AttachAllUnattachedDevicesFromKnownListReq::LockerAndInvoker lockvoker(
+		*request, mrntt::mrntt.thread,
+		std::bind(
+			&AttachAllUnattachedDevicesFromKnownListReq
+				::attachAllUnattachedDevicesFromKnownListReq1_posted,
+			request.get(), request));
 }
 
 class DeviceManager::DetachAllAttachedDeviceRoles