From fd314950d4854edabd3900a1bd380f1d55da29b6 Mon Sep 17 00:00:00 2001
From: jmcneill <jmcneill@NetBSD.org>
Date: Sun, 26 Jul 2015 17:54:33 +0000
Subject: [PATCH] Skip stream reset if HDAUDIO_FLAG_NO_STREAM_RESET flag is
 set.

---
 sys/dev/hdaudio/hdaudio.c    | 7 ++++---
 sys/dev/hdaudio/hdaudiovar.h | 5 ++++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/sys/dev/hdaudio/hdaudio.c b/sys/dev/hdaudio/hdaudio.c
index f54d8bb99f67..9daeb426532a 100644
--- a/sys/dev/hdaudio/hdaudio.c
+++ b/sys/dev/hdaudio/hdaudio.c
@@ -1,4 +1,4 @@
-/* $NetBSD: hdaudio.c,v 1.2 2015/05/20 18:28:32 riastradh Exp $ */
+/* $NetBSD: hdaudio.c,v 1.3 2015/07/26 17:54:33 jmcneill Exp $ */
 
 /*
  * Copyright (c) 2009 Precedence Technologies Ltd <support@precedence.co.uk>
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: hdaudio.c,v 1.2 2015/05/20 18:28:32 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: hdaudio.c,v 1.3 2015/07/26 17:54:33 jmcneill Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -1215,7 +1215,8 @@ hdaudio_stream_start(struct hdaudio_stream *st, int blksize,
 	KASSERT(st->st_bdl.dma_valid == true);
 
 	hdaudio_stream_stop(st);
-	hdaudio_stream_reset(st);
+	if ((sc->sc_flags & HDAUDIO_FLAG_NO_STREAM_RESET) == 0)
+		hdaudio_stream_reset(st);
 
 	/*
 	 * Configure buffer descriptor list
diff --git a/sys/dev/hdaudio/hdaudiovar.h b/sys/dev/hdaudio/hdaudiovar.h
index ac0cfb5b5282..b3806e633af1 100644
--- a/sys/dev/hdaudio/hdaudiovar.h
+++ b/sys/dev/hdaudio/hdaudiovar.h
@@ -1,4 +1,4 @@
-/* $NetBSD: hdaudiovar.h,v 1.3 2015/05/30 13:47:03 jmcneill Exp $ */
+/* $NetBSD: hdaudiovar.h,v 1.4 2015/07/26 17:54:33 jmcneill Exp $ */
 
 /*
  * Copyright (c) 2009 Precedence Technologies Ltd <support@precedence.co.uk>
@@ -157,6 +157,9 @@ struct hdaudio_softc {
 	struct hdaudio_stream	sc_stream[HDAUDIO_MAX_STREAMS];
 	uint32_t		sc_stream_mask;
 	kmutex_t		sc_stream_mtx;
+
+	uint32_t		sc_flags;
+#define HDAUDIO_FLAG_NO_STREAM_RESET	0x0001
 };
 
 int	hdaudio_attach(device_t, struct hdaudio_softc *);