From 4a7756137df3efd31eef5b29869f6567c932e52c Mon Sep 17 00:00:00 2001
From: Meng Wang <mengw@codeaurora.org>
Date: Sun, 24 Nov 2019 23:16:30 -0800
Subject: [PATCH] ALSA: pcm: add locks for accessing runtime resource

Add spin lock to resolve race conditions while
accessing substream runtime resource.

CRs-fixed: 2112713
Change-Id: I8db743303ceb50205d62adfc02caf6ecab635d47
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>
Signed-off-by: Meng Wang <mengw@codeaurora.org>
---
 include/sound/pcm.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index bbe6eb1ff5d2..cf563e968513 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -475,6 +475,9 @@ struct snd_pcm_substream {
 #endif /* CONFIG_SND_VERBOSE_PROCFS */
 	/* misc flags */
 	unsigned int hw_opened: 1;
+#ifdef CONFIG_AUDIO_QGKI
+	spinlock_t runtime_lock;
+#endif
 };
 
 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)