linux-kernel - [RFC PATCH v3 08/13] ASoC: soc-compress: protect for_each_dpcm

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Message-Id: <20211013143050.244444-9-pierre-louis.bossart@linux.intel.com>
Date:   Wed, 13 Oct 2021 09:30:45 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     alsa-devel@...a-project.org
Cc:     tiwai@...e.de, broonie@...nel.org, vkoul@...nel.org,
        Sameer Pujar <spujar@...dia.com>,
        Gyeongtaek Lee <gt82.lee@...sung.com>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [RFC PATCH v3 08/13] ASoC: soc-compress: protect for_each_dpcm_be() loops

Follow the locking model used within soc-pcm.c

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
---
 sound/soc/soc-compress.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index 8e2494a9f3a7..a1fc4083c88a 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -158,8 +158,10 @@ static int soc_compr_open_fe(struct snd_compr_stream *cstream)
 	ret = dpcm_be_dai_startup(fe, stream);
 	if (ret < 0) {
 		/* clean up all links */
+		snd_soc_dpcm_fe_lock_irq(fe, stream);
 		for_each_dpcm_be(fe, stream, dpcm)
 			dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
+		snd_soc_dpcm_fe_unlock_irq(fe, stream);
 
 		dpcm_be_disconnect(fe, stream);
 		fe->dpcm[stream].runtime = NULL;
@@ -224,8 +226,10 @@ static int soc_compr_free_fe(struct snd_compr_stream *cstream)
 	dpcm_be_dai_shutdown(fe, stream);
 
 	/* mark FE's links ready to prune */
+	snd_soc_dpcm_fe_lock_irq(fe, stream);
 	for_each_dpcm_be(fe, stream, dpcm)
 		dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
+	snd_soc_dpcm_fe_unlock_irq(fe, stream);
 
 	dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
 
-- 
2.25.1