From c7071c43bac47c363e2752365ce32580a8c46b95 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Fri, 1 Jul 2011 02:33:20 +0300
Subject: [PATCH] cdrom: merge shalma's suggestions

http://www.gp32x.com/board/index.php?/topic/57973-pcsx-rearmed/page__view__findpost__p__952591
---
 libpcsxcore/cdrom.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/libpcsxcore/cdrom.c b/libpcsxcore/cdrom.c
index 15698399..cc377b9f 100644
--- a/libpcsxcore/cdrom.c
+++ b/libpcsxcore/cdrom.c
@@ -1937,6 +1937,7 @@ void cdrWrite3(unsigned char rt) {
 
 void psxDma3(u32 madr, u32 bcr, u32 chcr) {
 	u32 cdsize;
+	int size;
 	u8 *ptr;
 
 #ifdef CDR_LOG
@@ -1981,15 +1982,12 @@ void psxDma3(u32 madr, u32 bcr, u32 chcr) {
 			- CdlPlay
 			- Spams DMA3 and gets buffer overrun
 			*/
-
-			if( (cdr.pTransfer-cdr.Transfer) + cdsize > 2352 )
-			{
-				// avoid crash - probably should wrap here
-				//memcpy(ptr, cdr.pTransfer, cdsize);
-			}
-			else
+			size = CD_FRAMESIZE_RAW - (cdr.pTransfer - cdr.Transfer);
+			if (size > cdsize)
+				size = cdsize;
+			if (size > 0)
 			{
-				memcpy(ptr, cdr.pTransfer, cdsize);
+				memcpy(ptr, cdr.pTransfer, size);
 			}
 
 			psxCpu->Clear(madr, cdsize / 4);
-- 
2.39.5