From 0d1a5831449c4f31993ca4838dd1c39707e96cce Mon Sep 17 00:00:00 2001
From: refractionpcsx2 <refraction@gmail.com>
Date: Wed, 7 Oct 2020 14:05:27 +0100
Subject: [PATCH] DMA: Handle undefined Chain mode tags Fixes DT Racer speed
 issues

---
 pcsx2/Hw.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pcsx2/Hw.cpp b/pcsx2/Hw.cpp
index d2beae16cc..6ec0fe1f0d 100644
--- a/pcsx2/Hw.cpp
+++ b/pcsx2/Hw.cpp
@@ -399,6 +399,10 @@ bool hwDmacSrcChain(DMACh& dma, int id)
 			dma.madr = dma.tadr + 16;
 			//Don't Increment tadr; breaks Soul Calibur II and III
 			return true;
+		// Undefined Tag handling ends the DMA, maintaining the bad TADR and Tag in upper CHCR
+		// Some games such as DT racer try to use RET tags on IPU, which it doesn't support
+		default:
+			return true;
 	}
 
 	return false;