From 59193248996462a84edee99cffe13be466f4977c Mon Sep 17 00:00:00 2001
From: TC1995 <mariogplayer90@gmail.com>
Date: Thu, 18 Nov 2021 22:07:27 +0100
Subject: [PATCH] Made bits 16 and 18 of the Sample Rate Converter register of
 the ES1371 not writeable, fixes hangs with most NT 4.0 ES1371 drivers while
 keeping compatibility with other operating systems' drivers.

---
 src/sound/snd_audiopci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sound/snd_audiopci.c b/src/sound/snd_audiopci.c
index d69b9a211..e93267376 100644
--- a/src/sound/snd_audiopci.c
+++ b/src/sound/snd_audiopci.c
@@ -964,7 +964,7 @@ es1371_outl(uint16_t port, uint32_t val, void *p)
 	/* Sample Rate Converter Interface Register, Address 10H
 	   Addressable as longword only */
 	case 0x10:
-		dev->sr_cir = val;
+		dev->sr_cir = val & 0xfff8ffff; /*Bits 16 to 18 are undefined*/
 		if (dev->sr_cir & SRC_RAM_WE) {
 			dev->sr_ram[dev->sr_cir >> 25] = val & 0xffff;
 			switch (dev->sr_cir >> 25) {