linux-kernel - [PATCH 6.8 540/715] ALSA: hda/tas2781: add lock to system

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Date: Sun, 24 Mar 2024 18:31:59 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Gergo Koteles <soyer@....hu>,
	Takashi Iwai <tiwai@...e.de>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.8 540/715] ALSA: hda/tas2781: add lock to system_suspend

From: Gergo Koteles <soyer@....hu>

[ Upstream commit c58e6ed55a1bb9811d6d936d001b068bb0419467 ]

Add the missing lock around tasdevice_tuning_switch().

Fixes: 5be27f1e3ec9 ("ALSA: hda/tas2781: Add tas2781 HDA driver")
Signed-off-by: Gergo Koteles <soyer@....hu>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Message-ID: <c666da13d4bc48cd1ab1357479e0c6096541372c.1709918447.git.soyer@....hu>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/pci/hda/tas2781_hda_i2c.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/pci/hda/tas2781_hda_i2c.c b/sound/pci/hda/tas2781_hda_i2c.c
index ee3e0afc9b313..750e49fbb91e5 100644
--- a/sound/pci/hda/tas2781_hda_i2c.c
+++ b/sound/pci/hda/tas2781_hda_i2c.c
@@ -885,9 +885,13 @@ static int tas2781_system_suspend(struct device *dev)
 	if (ret)
 		return ret;
 
+	mutex_lock(&tas_hda->priv->codec_lock);
+
 	/* Shutdown chip before system suspend */
 	tasdevice_tuning_switch(tas_hda->priv, 1);
 
+	mutex_unlock(&tas_hda->priv->codec_lock);
+
 	/*
 	 * Reset GPIO may be shared, so cannot reset here.
 	 * However beyond this point, amps may be powered down.
-- 
2.43.0