Commit 4a775613 authored Nov 24, 2019 by Meng Wang

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>

parent 11b286fb

include/sound/pcm.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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)