From e02ef3c3bed2f8e98ec9481cdea1a6253c34e9d1 Mon Sep 17 00:00:00 2001
From: Morph <39850852+Morph1984@users.noreply.github.com>
Date: Thu, 8 Oct 2020 08:18:50 -0400
Subject: [PATCH] controllers/npad: Stop games from vibrating incorrect
 controllers

Fixes vibration in 1-2 Switch and potentially other games where they would vibrate both players' joycons at the same time.
---
 src/core/hle/service/hid/controllers/npad.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/core/hle/service/hid/controllers/npad.cpp b/src/core/hle/service/hid/controllers/npad.cpp
index 8a5e5abcf..f865e3f5f 100644
--- a/src/core/hle/service/hid/controllers/npad.cpp
+++ b/src/core/hle/service/hid/controllers/npad.cpp
@@ -688,6 +688,16 @@ void Controller_NPad::VibrateController(const std::vector<DeviceHandle>& vibrati
             continue;
         }
 
+        // Some games try to send mismatched parameters in the device handle, block these.
+        if ((connected_controllers[npad_index].type == NPadControllerType::JoyLeft &&
+             (vibration_device_handles[i].npad_type == NpadType::JoyconRight ||
+              vibration_device_handles[i].device_index == DeviceIndex::Right)) ||
+            (connected_controllers[npad_index].type == NPadControllerType::JoyRight &&
+             (vibration_device_handles[i].npad_type == NpadType::JoyconLeft ||
+              vibration_device_handles[i].device_index == DeviceIndex::Left))) {
+            continue;
+        }
+
         using namespace Settings::NativeButton;
         const auto& button_state = buttons[npad_index];