linux-kernel - [RFC PATCH v3 10/13] ASoC: fsl: asrc_dma: protect for_each_dpcm

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Message-Id: <20211013143050.244444-11-pierre-louis.bossart@linux.intel.com>
Date:   Wed, 13 Oct 2021 09:30:47 -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>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Shengjiu Wang <shengjiu.wang@...il.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        linuxppc-dev@...ts.ozlabs.org (open list:FREESCALE SOC SOUND DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Subject: [RFC PATCH v3 10/13] ASoC: fsl: asrc_dma: 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/fsl/fsl_asrc_dma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/fsl/fsl_asrc_dma.c b/sound/soc/fsl/fsl_asrc_dma.c
index cd9b36ec0ecb..b67097503836 100644
--- a/sound/soc/fsl/fsl_asrc_dma.c
+++ b/sound/soc/fsl/fsl_asrc_dma.c
@@ -151,6 +151,7 @@ static int fsl_asrc_dma_hw_params(struct snd_soc_component *component,
 	int ret, width;
 
 	/* Fetch the Back-End dma_data from DPCM */
+	snd_soc_dpcm_fe_lock_irq(rtd, stream);
 	for_each_dpcm_be(rtd, stream, dpcm) {
 		struct snd_soc_pcm_runtime *be = dpcm->be;
 		struct snd_pcm_substream *substream_be;
@@ -164,6 +165,7 @@ static int fsl_asrc_dma_hw_params(struct snd_soc_component *component,
 		dev_be = dai->dev;
 		break;
 	}
+	snd_soc_dpcm_fe_unlock_irq(rtd, stream);
 
 	if (!dma_params_be) {
 		dev_err(dev, "failed to get the substream of Back-End\n");
-- 
2.25.1