From 112075b3ad03ba34cd4f44b5964a18f3637203c3 Mon Sep 17 00:00:00 2001
From: Ibrahn Sahir <ibrahn.sahir@gmail.com>
Date: Mon, 23 Jul 2018 12:55:34 +0100
Subject: [PATCH] correctly close handle in alsa audio driver.

(cherry picked from commit 3e85e89dc548401b779c403f182860e5dcd31927)
---
 drivers/alsa/audio_driver_alsa.cpp | 10 ++++++----
 drivers/alsa/audio_driver_alsa.h   |  1 -
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/alsa/audio_driver_alsa.cpp b/drivers/alsa/audio_driver_alsa.cpp
index 3dfecb15c9d..b64596423df 100644
--- a/drivers/alsa/audio_driver_alsa.cpp
+++ b/drivers/alsa/audio_driver_alsa.cpp
@@ -58,7 +58,10 @@ Error AudioDriverALSA::init_device() {
 #define CHECK_FAIL(m_cond)                                       \
 	if (m_cond) {                                                \
 		fprintf(stderr, "ALSA ERR: %s\n", snd_strerror(status)); \
-		snd_pcm_close(pcm_handle);                               \
+		if (pcm_handle) {                                        \
+			snd_pcm_close(pcm_handle);                           \
+			pcm_handle = NULL;                                   \
+		}                                                        \
 		ERR_FAIL_COND_V(m_cond, ERR_CANT_OPEN);                  \
 	}
 
@@ -152,7 +155,6 @@ Error AudioDriverALSA::init() {
 	active = false;
 	thread_exited = false;
 	exit_thread = false;
-	pcm_open = false;
 
 	Error err = init_device();
 	if (err == OK) {
@@ -315,9 +317,9 @@ void AudioDriverALSA::unlock() {
 
 void AudioDriverALSA::finish_device() {
 
-	if (pcm_open) {
+	if (pcm_handle) {
 		snd_pcm_close(pcm_handle);
-		pcm_open = NULL;
+		pcm_handle = NULL;
 	}
 }
 
diff --git a/drivers/alsa/audio_driver_alsa.h b/drivers/alsa/audio_driver_alsa.h
index 265a4ff58f2..0079ffb6d92 100644
--- a/drivers/alsa/audio_driver_alsa.h
+++ b/drivers/alsa/audio_driver_alsa.h
@@ -66,7 +66,6 @@ class AudioDriverALSA : public AudioDriver {
 	bool active;
 	bool thread_exited;
 	mutable bool exit_thread;
-	bool pcm_open;
 
 public:
 	const char *get_name() const {