linux-kernel - [RFC PATCH v3 09/13] ASoC: sh: rcar: protect for_each_dpcm

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Message-Id: <20211013143050.244444-10-pierre-louis.bossart@linux.intel.com>
Date:   Wed, 13 Oct 2021 09:30:46 -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>, Joe Perches <joe@...ches.com>,
        Mikhail Durnev <mikhail_durnev@...tor.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [RFC PATCH v3 09/13] ASoC: sh: rcar: 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/sh/rcar/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index 978bd0406729..ccd5c2d1cdc6 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -1511,6 +1511,7 @@ static int rsnd_hw_params(struct snd_soc_component *component,
 		struct snd_soc_dpcm *dpcm;
 		int stream = substream->stream;
 
+		snd_soc_dpcm_fe_lock_irq(fe, stream);
 		for_each_dpcm_be(fe, stream, dpcm) {
 			struct snd_pcm_hw_params *be_params = &dpcm->hw_params;
 
@@ -1519,6 +1520,7 @@ static int rsnd_hw_params(struct snd_soc_component *component,
 			if (params_rate(hw_params) != params_rate(be_params))
 				io->converted_rate = params_rate(be_params);
 		}
+		snd_soc_dpcm_fe_unlock_irq(fe, stream);
 		if (io->converted_chan)
 			dev_dbg(dev, "convert channels = %d\n", io->converted_chan);
 		if (io->converted_rate) {
-- 
2.25.1