From 95968c7e0e78d98b7aa9bfaf7735000d1a1b16b2 Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <stenzek@gmail.com>
Date: Fri, 14 Oct 2022 19:37:11 +1000
Subject: [PATCH] CommonHotkeys: Fix target speed going below zero

Also clamps to 100% for challenge mode.
---
 pcsx2/Frontend/CommonHotkeys.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pcsx2/Frontend/CommonHotkeys.cpp b/pcsx2/Frontend/CommonHotkeys.cpp
index feac34b122..da2523e61c 100644
--- a/pcsx2/Frontend/CommonHotkeys.cpp
+++ b/pcsx2/Frontend/CommonHotkeys.cpp
@@ -41,7 +41,8 @@ void CommonHost::Internal::ResetVMHotkeyState()
 
 static void HotkeyAdjustTargetSpeed(double delta)
 {
-	EmuConfig.Framerate.NominalScalar = EmuConfig.GS.LimitScalar + delta;
+	const double min_speed = Achievements::ChallengeModeActive() ? 1.0 : 0.1;
+	EmuConfig.Framerate.NominalScalar = std::max(min_speed, EmuConfig.GS.LimitScalar + delta);
 	VMManager::SetLimiterMode(LimiterModeType::Nominal);
 	gsUpdateFrequency(EmuConfig);
 	GetMTGS().SetVSync(EmuConfig.GetEffectiveVsyncMode());