From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Thu, 12 Jan 2023 11:28:50 +0000 (+0200)
Subject: ASoC: Intel: bytcr_rt5640: Drop reference count of ACPI device after use
X-Git-Tag: v6.1.15~527
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c72c57b689bf8adff07dcb1b3c2b8ef7910842c3;p=platform%2Fkernel%2Flinux-starfive.git

ASoC: Intel: bytcr_rt5640: Drop reference count of ACPI device after use

[ Upstream commit cbf87bcf46e399e9a5288430d940efbad3551c68 ]

Theoretically the device might gone if its reference count drops to 0.
This might be the case when we try to find the first physical node of
the ACPI device. We need to keep reference to it until we get a result
of the above mentioned call. Refactor the code to drop the reference
count at the correct place.

While at it, move to acpi_dev_put() as symmetrical call to the
acpi_dev_get_first_match_dev().

Fixes: a232b96dcece ("ASoC: Intel: bytcr_rt5640: use HID translation util")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230112112852.67714-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c
index ddd2625..4f46f52 100644
--- a/sound/soc/intel/boards/bytcr_rt5640.c
+++ b/sound/soc/intel/boards/bytcr_rt5640.c
@@ -1626,13 +1626,18 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev)
 	if (adev) {
 		snprintf(byt_rt5640_codec_name, sizeof(byt_rt5640_codec_name),
 			 "i2c-%s", acpi_dev_name(adev));
-		put_device(&adev->dev);
 		byt_rt5640_dais[dai_index].codecs->name = byt_rt5640_codec_name;
 	} else {
 		dev_err(dev, "Error cannot find '%s' dev\n", mach->id);
 		return -ENXIO;
 	}
 
+	codec_dev = acpi_get_first_physical_node(adev);
+	acpi_dev_put(adev);
+	if (!codec_dev)
+		return -EPROBE_DEFER;
+	priv->codec_dev = get_device(codec_dev);
+
 	/*
 	 * swap SSP0 if bytcr is detected
 	 * (will be overridden if DMI quirk is detected)
@@ -1707,11 +1712,6 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev)
 		byt_rt5640_quirk = quirk_override;
 	}
 
-	codec_dev = acpi_get_first_physical_node(adev);
-	if (!codec_dev)
-		return -EPROBE_DEFER;
-	priv->codec_dev = get_device(codec_dev);
-
 	if (byt_rt5640_quirk & BYT_RT5640_JD_HP_ELITEP_1000G2) {
 		acpi_dev_add_driver_gpios(ACPI_COMPANION(priv->codec_dev),
 					  byt_rt5640_hp_elitepad_1000g2_gpios);