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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        =?UTF-8?q?Amadeusz=20S=C5=82awi=C5=84ski?= 
        <amadeuszx.slawinski@linux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        Mark Brown <broonie@kernel.org>
Subject: [PATCH 5.10 137/142] ASoC: topology: Properly unregister DAI on removal
Date:   Tue,  2 Feb 2021 14:38:20 +0100
Message-Id: <20210202133003.341783247@linuxfoundation.org>
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From: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>

commit fc4cb1e15f0c66f2e37314349dc4a82bd946fbb1 upstream.

DAIs need to be removed when topology unload function is called (usually
done when component is being removed). We can't do this when device is
being removed, as structures we operate on when removing DAI can already
be freed.

Fixes: 6ae4902f2f34 ("ASoC: soc-topology: use devm_snd_soc_register_dai()")
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210120152846.1703655-2-amadeuszx.slawinski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/soc/soc-topology.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -506,7 +506,7 @@ static void remove_dai(struct snd_soc_co
 {
 	struct snd_soc_dai_driver *dai_drv =
 		container_of(dobj, struct snd_soc_dai_driver, dobj);
-	struct snd_soc_dai *dai;
+	struct snd_soc_dai *dai, *_dai;
 
 	if (pass != SOC_TPLG_PASS_PCM_DAI)
 		return;
@@ -514,9 +514,9 @@ static void remove_dai(struct snd_soc_co
 	if (dobj->ops && dobj->ops->dai_unload)
 		dobj->ops->dai_unload(comp, dobj);
 
-	for_each_component_dais(comp, dai)
+	for_each_component_dais_safe(comp, dai, _dai)
 		if (dai->driver == dai_drv)
-			dai->driver = NULL;
+			snd_soc_unregister_dai(dai);
 
 	kfree(dai_drv->playback.stream_name);
 	kfree(dai_drv->capture.stream_name);
@@ -1876,7 +1876,7 @@ static int soc_tplg_dai_create(struct so
 	list_add(&dai_drv->dobj.list, &tplg->comp->dobj_list);
 
 	/* register the DAI to the component */
-	dai = devm_snd_soc_register_dai(tplg->comp->dev, tplg->comp, dai_drv, false);
+	dai = snd_soc_register_dai(tplg->comp, dai_drv, false);
 	if (!dai)
 		return -ENOMEM;
 
@@ -1884,6 +1884,7 @@ static int soc_tplg_dai_create(struct so
 	ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
 	if (ret != 0) {
 		dev_err(dai->dev, "Failed to create DAI widgets %d\n", ret);
+		snd_soc_unregister_dai(dai);
 		return ret;
 	}