[PATCH 07/11] ASoC: renesas: msiof: Explain component open return value handling

From: phucduc.bui@gmail.com
To: Vijendar Mukunda <Vijendar.Mukunda@amd.com>,
	Venkata Prasad Potturu <venkataprasad.potturu@amd.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
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	Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
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Cc: Kees Cook <kees@kernel.org>,
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	linux-sound@vger.kernel.org, asahi@lists.linux.dev,
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	bui duc phuc <phucduc.bui@gmail.com>
Subject: [PATCH 07/11] ASoC: renesas: msiof: Explain component open return value handling
Date: Fri, 16 Oct 2026 11:09:42 +0700	[thread overview]
Message-ID: <20261016040946.521195-8-phucduc.bui@gmail.com> (raw)
In-Reply-To: <20261016040946.521195-1-phucduc.bui@gmail.com>

From: bui duc phuc <phucduc.bui@gmail.com>

Add a comment explaining why .open() must return 0 on success
to ensure the component is correctly marked as opened and
prevent future changes from reintroducing the issue.

Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/renesas/fsi.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/soc/renesas/fsi.c b/sound/soc/renesas/fsi.c
index 88618e4b052d..74e2ea002fbb 100644
--- a/sound/soc/renesas/fsi.c
+++ b/sound/soc/renesas/fsi.c
@@ -1820,6 +1820,11 @@ static int fsi_pcm_open(struct snd_soc_component *component,
 	if (ret < 0)
 		return ret;
 
+	/*
+	 * ASoC only marks the component as opened when .open() returns 0.
+	 * Since snd_pcm_hw_constraint_integer() may return 1, explicitly
+	 * return 0 to ensure the component is correctly marked as opened.
+	 */
 	return 0;
 }
 
-- 
2.43.0


