diff --git a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
index 95ce7e5d96..74aa6de3a3 100644
--- a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
@@ -135,22 +135,15 @@ void ControllerInterface::Shutdown()
 //
 // Update input for all devices, return true if all devices returned successful
 //
-bool ControllerInterface::UpdateInput()
+void ControllerInterface::UpdateInput()
 {
 	std::unique_lock<std::recursive_mutex> lk(update_lock, std::defer_lock);
 
 	if (!lk.try_lock())
-		return false;
-
-	size_t ok_count = 0;
+		return;
 
 	for (ciface::Core::Device* d : m_devices)
-	{
-		if (d->UpdateInput())
-			++ok_count;
-	}
-
-	return (m_devices.size() == ok_count);
+		d->UpdateInput();
 }
 
 //
@@ -158,22 +151,15 @@ bool ControllerInterface::UpdateInput()
 //
 // Update output for all devices, return true if all devices returned successful
 //
-bool ControllerInterface::UpdateOutput()
+void ControllerInterface::UpdateOutput()
 {
 	std::unique_lock<std::recursive_mutex> lk(update_lock, std::defer_lock);
 
 	if (!lk.try_lock())
-		return false;
-
-	size_t ok_count = 0;
+		return;
 
 	for (ciface::Core::Device* d : m_devices)
-	{
-		if (d->UpdateOutput())
-			++ok_count;
-	}
-
-	return (m_devices.size() == ok_count);
+		d->UpdateOutput();
 }
 
 //
diff --git a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h
index 56723b123f..9600aded63 100644
--- a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h
+++ b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h
@@ -120,8 +120,8 @@ public:
 	bool IsInit() const { return m_is_init; }
 
 	void UpdateReference(ControlReference* control, const ciface::Core::DeviceQualifier& default_device) const;
-	bool UpdateInput();
-	bool UpdateOutput();
+	void UpdateInput();
+	void UpdateOutput();
 
 	std::recursive_mutex update_lock;
 
diff --git a/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.cpp b/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.cpp
index 0c1ed5aa18..bc8638293e 100644
--- a/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.cpp
@@ -177,7 +177,7 @@ std::string Joystick::GetSource() const
 
 // update IO
 
-bool Joystick::UpdateInput()
+void Joystick::UpdateInput()
 {
 	HRESULT hr = 0;
 
@@ -215,9 +215,7 @@ bool Joystick::UpdateInput()
 
 	// try reacquire if input lost
 	if (DIERR_INPUTLOST == hr || DIERR_NOTACQUIRED == hr)
-		hr = m_device->Acquire();
-
-	return SUCCEEDED(hr);
+		m_device->Acquire();
 }
 
 // get name
diff --git a/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.h b/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.h
index 17770afe5a..f1af8102cd 100644
--- a/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.h
+++ b/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.h
@@ -52,7 +52,7 @@ private:
 	};
 
 public:
-	bool UpdateInput();
+	void UpdateInput() override;
 
 	Joystick(const LPDIRECTINPUTDEVICE8 device, const unsigned int index);
 	~Joystick();
diff --git a/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.cpp b/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.cpp
index 692826aebb..c96e51a830 100644
--- a/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.cpp
@@ -139,7 +139,7 @@ void GetMousePos(ControlState* const x, ControlState* const y)
 	*y = (ControlState)point.y / (ControlState)win_height * 2 - 1;
 }
 
-bool KeyboardMouse::UpdateInput()
+void KeyboardMouse::UpdateInput()
 {
 	DIMOUSESTATE2 tmp_mouse;
 
@@ -175,11 +175,7 @@ bool KeyboardMouse::UpdateInput()
 
 		// update mouse cursor
 		GetMousePos(&m_state_in.cursor.x, &m_state_in.cursor.y);
-
-		return true;
 	}
-
-	return false;
 }
 
 std::string KeyboardMouse::GetName() const
diff --git a/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.h b/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.h
index 0f3dfece83..704635057e 100644
--- a/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.h
+++ b/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.h
@@ -77,7 +77,7 @@ private:
 	};
 
 public:
-	bool UpdateInput();
+	void UpdateInput() override;
 
 	KeyboardMouse(const LPDIRECTINPUTDEVICE8 kb_device, const LPDIRECTINPUTDEVICE8 mo_device);
 	~KeyboardMouse();
diff --git a/Source/Core/InputCommon/ControllerInterface/Device.h b/Source/Core/InputCommon/ControllerInterface/Device.h
index abc7a68185..6f54f9adf5 100644
--- a/Source/Core/InputCommon/ControllerInterface/Device.h
+++ b/Source/Core/InputCommon/ControllerInterface/Device.h
@@ -100,8 +100,8 @@ public:
 	virtual std::string GetName() const = 0;
 	virtual int GetId() const = 0;
 	virtual std::string GetSource() const = 0;
-	virtual bool UpdateInput() { return true; }
-	virtual bool UpdateOutput() { return true; }
+	virtual void UpdateInput() {}
+	virtual void UpdateOutput() {}
 
 	const std::vector<Input*>& Inputs() const { return m_inputs; }
 	const std::vector<Output*>& Outputs() const { return m_outputs; }
diff --git a/Source/Core/InputCommon/ControllerInterface/ForceFeedback/ForceFeedbackDevice.cpp b/Source/Core/InputCommon/ControllerInterface/ForceFeedback/ForceFeedbackDevice.cpp
index 4350444492..f8efad343a 100644
--- a/Source/Core/InputCommon/ControllerInterface/ForceFeedback/ForceFeedbackDevice.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/ForceFeedback/ForceFeedbackDevice.cpp
@@ -133,10 +133,8 @@ bool ForceFeedbackDevice::InitForceFeedback(const LPDIRECTINPUTDEVICE8 device, i
 	return true;
 }
 
-bool ForceFeedbackDevice::UpdateOutput()
+void ForceFeedbackDevice::UpdateOutput()
 {
-	size_t ok_count = 0;
-
 	DIEFFECT eff;
 	memset(&eff, 0, sizeof(eff));
 	eff.dwSize = sizeof(DIEFFECT);
@@ -151,22 +149,16 @@ bool ForceFeedbackDevice::UpdateOutput()
 				eff.cbTypeSpecificParams = state.size;
 				eff.lpvTypeSpecificParams = state.params;
 				// set params and start effect
-				ok_count += SUCCEEDED(state.iface->SetParameters(&eff, DIEP_TYPESPECIFICPARAMS | DIEP_START));
+				state.iface->SetParameters(&eff, DIEP_TYPESPECIFICPARAMS | DIEP_START);
 			}
 			else
 			{
-				ok_count += SUCCEEDED(state.iface->Stop());
+				state.iface->Stop();
 			}
 
 			state.params = nullptr;
 		}
-		else
-		{
-			++ok_count;
-		}
 	}
-
-	return (m_state_out.size() == ok_count);
 }
 
 template<>
diff --git a/Source/Core/InputCommon/ControllerInterface/ForceFeedback/ForceFeedbackDevice.h b/Source/Core/InputCommon/ControllerInterface/ForceFeedback/ForceFeedbackDevice.h
index 31a1884aae..8b26ffeff2 100644
--- a/Source/Core/InputCommon/ControllerInterface/ForceFeedback/ForceFeedbackDevice.h
+++ b/Source/Core/InputCommon/ControllerInterface/ForceFeedback/ForceFeedbackDevice.h
@@ -52,7 +52,7 @@ private:
 
 public:
 	bool InitForceFeedback(const LPDIRECTINPUTDEVICE8, int cAxes);
-	bool UpdateOutput();
+	void UpdateOutput() override;
 
 	virtual ~ForceFeedbackDevice();
 private:
diff --git a/Source/Core/InputCommon/ControllerInterface/OSX/OSXKeyboard.h b/Source/Core/InputCommon/ControllerInterface/OSX/OSXKeyboard.h
index c38235c2b8..06e686fc6a 100644
--- a/Source/Core/InputCommon/ControllerInterface/OSX/OSXKeyboard.h
+++ b/Source/Core/InputCommon/ControllerInterface/OSX/OSXKeyboard.h
@@ -53,7 +53,7 @@ private:
 	};
 
 public:
-	bool UpdateInput() override;
+	void UpdateInput() override;
 
 	Keyboard(IOHIDDeviceRef device, std::string name, int index, void *window);
 
diff --git a/Source/Core/InputCommon/ControllerInterface/OSX/OSXKeyboard.mm b/Source/Core/InputCommon/ControllerInterface/OSX/OSXKeyboard.mm
index 5a97b27488..0e876f4173 100644
--- a/Source/Core/InputCommon/ControllerInterface/OSX/OSXKeyboard.mm
+++ b/Source/Core/InputCommon/ControllerInterface/OSX/OSXKeyboard.mm
@@ -54,7 +54,7 @@ Keyboard::Keyboard(IOHIDDeviceRef device, std::string name, int index, void *win
 		AddInput(new Button(i, m_mousebuttons[i]));
 }
 
-bool Keyboard::UpdateInput()
+void Keyboard::UpdateInput()
 {
 	CGRect bounds = CGRectZero;
 	uint32_t windowid[1] = { m_windowid };
@@ -85,8 +85,6 @@ bool Keyboard::UpdateInput()
 	m_mousebuttons[0] = CGEventSourceButtonState(kCGEventSourceStateHIDSystemState, kCGMouseButtonLeft);
 	m_mousebuttons[1] = CGEventSourceButtonState(kCGEventSourceStateHIDSystemState, kCGMouseButtonRight);
 	m_mousebuttons[2] = CGEventSourceButtonState(kCGEventSourceStateHIDSystemState, kCGMouseButtonCenter);
-
-	return true;
 }
 
 std::string Keyboard::GetName() const
diff --git a/Source/Core/InputCommon/ControllerInterface/SDL/SDL.cpp b/Source/Core/InputCommon/ControllerInterface/SDL/SDL.cpp
index b745f7b2d4..5428778163 100644
--- a/Source/Core/InputCommon/ControllerInterface/SDL/SDL.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/SDL/SDL.cpp
@@ -316,15 +316,13 @@ void Joystick::TriangleEffect::SetState(ControlState state)
 }
 #endif
 
-bool Joystick::UpdateInput()
+void Joystick::UpdateInput()
 {
 	// each joystick is doin this, o well
 	SDL_JoystickUpdate();
-
-	return true;
 }
 
-bool Joystick::UpdateOutput()
+void Joystick::UpdateOutput()
 {
 #ifdef USE_SDL_HAPTIC
 	for (auto &i : m_state_out)
@@ -359,7 +357,6 @@ bool Joystick::UpdateOutput()
 		}
 	}
 #endif
-	return true;
 }
 
 std::string Joystick::GetName() const
diff --git a/Source/Core/InputCommon/ControllerInterface/SDL/SDL.h b/Source/Core/InputCommon/ControllerInterface/SDL/SDL.h
index 76fc028ec9..d1aeb38f4a 100644
--- a/Source/Core/InputCommon/ControllerInterface/SDL/SDL.h
+++ b/Source/Core/InputCommon/ControllerInterface/SDL/SDL.h
@@ -134,8 +134,8 @@ private:
 #endif
 
 public:
-	bool UpdateInput() override;
-	bool UpdateOutput() override;
+	void UpdateInput() override;
+	void UpdateOutput() override;
 
 	Joystick(SDL_Joystick* const joystick, const int sdl_index, const unsigned int index);
 	~Joystick();
diff --git a/Source/Core/InputCommon/ControllerInterface/XInput/XInput.cpp b/Source/Core/InputCommon/ControllerInterface/XInput/XInput.cpp
index 961b92270b..68d7eeb479 100644
--- a/Source/Core/InputCommon/ControllerInterface/XInput/XInput.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/XInput/XInput.cpp
@@ -203,23 +203,19 @@ std::string Device::GetSource() const
 
 // Update I/O
 
-bool Device::UpdateInput()
+void Device::UpdateInput()
 {
-	return (ERROR_SUCCESS == PXInputGetState(m_index, &m_state_in));
+	PXInputGetState(m_index, &m_state_in);
 }
 
-bool Device::UpdateOutput()
+void Device::UpdateOutput()
 {
 	// this if statement is to make rumble work better when multiple ControllerInterfaces are using the device
 	// only calls XInputSetState if the state changed
 	if (memcmp(&m_state_out, &m_current_state_out, sizeof(m_state_out)))
 	{
 		m_current_state_out = m_state_out;
-		return (ERROR_SUCCESS == PXInputSetState(m_index, &m_state_out));
-	}
-	else
-	{
-		return true;
+		PXInputSetState(m_index, &m_state_out);
 	}
 }
 
diff --git a/Source/Core/InputCommon/ControllerInterface/XInput/XInput.h b/Source/Core/InputCommon/ControllerInterface/XInput/XInput.h
index 0092870265..17ee333e97 100644
--- a/Source/Core/InputCommon/ControllerInterface/XInput/XInput.h
+++ b/Source/Core/InputCommon/ControllerInterface/XInput/XInput.h
@@ -73,8 +73,8 @@ private:
 	};
 
 public:
-	bool UpdateInput();
-	bool UpdateOutput();
+	void UpdateInput() override;
+	void UpdateOutput() override;
 
 	Device(const XINPUT_CAPABILITIES& capabilities, u8 index);
 
diff --git a/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.cpp b/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.cpp
index 4d7cc26b4d..1d7d080d7e 100644
--- a/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.cpp
@@ -208,7 +208,7 @@ void KeyboardMouse::UpdateCursor()
 	m_state.cursor.y = win_y / (float)win_attribs.height * 2 - 1;
 }
 
-bool KeyboardMouse::UpdateInput()
+void KeyboardMouse::UpdateInput()
 {
 	XFlush(m_display);
 
@@ -282,8 +282,6 @@ bool KeyboardMouse::UpdateInput()
 	m_state.axis.y *= MOUSE_AXIS_SMOOTHING;
 	m_state.axis.y += delta_y;
 	m_state.axis.y /= MOUSE_AXIS_SMOOTHING+1.0f;
-
-	return true;
 }
 
 std::string KeyboardMouse::GetName() const
diff --git a/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.h b/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.h
index 064dd997f7..3f31aa50f2 100644
--- a/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.h
+++ b/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.h
@@ -98,7 +98,7 @@ private:
 	void UpdateCursor();
 
 public:
-	bool UpdateInput() override;
+	void UpdateInput() override;
 
 	KeyboardMouse(Window window, int opcode, int pointer_deviceid, int keyboard_deviceid);
 	~KeyboardMouse();
diff --git a/Source/Core/InputCommon/ControllerInterface/Xlib/Xlib.cpp b/Source/Core/InputCommon/ControllerInterface/Xlib/Xlib.cpp
index e938cfc1bc..9a700a9c99 100644
--- a/Source/Core/InputCommon/ControllerInterface/Xlib/Xlib.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/Xlib/Xlib.cpp
@@ -49,7 +49,7 @@ KeyboardMouse::~KeyboardMouse()
 	XCloseDisplay(m_display);
 }
 
-bool KeyboardMouse::UpdateInput()
+void KeyboardMouse::UpdateInput()
 {
 	XQueryKeymap(m_display, m_state.keyboard);
 
@@ -64,8 +64,6 @@ bool KeyboardMouse::UpdateInput()
 	// the mouse position as a range from -1 to 1
 	m_state.cursor.x = (float)win_x / (float)win_attribs.width * 2 - 1;
 	m_state.cursor.y = (float)win_y / (float)win_attribs.height * 2 - 1;
-
-	return true;
 }
 
 std::string KeyboardMouse::GetName() const
diff --git a/Source/Core/InputCommon/ControllerInterface/Xlib/Xlib.h b/Source/Core/InputCommon/ControllerInterface/Xlib/Xlib.h
index 61d520d08c..0c2f79c8b3 100644
--- a/Source/Core/InputCommon/ControllerInterface/Xlib/Xlib.h
+++ b/Source/Core/InputCommon/ControllerInterface/Xlib/Xlib.h
@@ -70,7 +70,7 @@ private:
 	};
 
 public:
-	bool UpdateInput() override;
+	void UpdateInput() override;
 
 	KeyboardMouse(Window window);
 	~KeyboardMouse();