linux-kernel - [PATCH] ASoc: SOF: topology: Clear SOF link platform name upon unload

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Message-ID: <20240821041006.2618855-1-wenst@chromium.org>
Date: Wed, 21 Aug 2024 12:10:04 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
	Bard Liao <yung-chuan.liao@...ux.intel.com>,
	Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
	Daniel Baluta <daniel.baluta@....com>,
	Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>
Cc: Chen-Yu Tsai <wenst@...omium.org>,
	sound-open-firmware@...a-project.org,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ASoc: SOF: topology: Clear SOF link platform name upon unload

The SOF topology loading function sets the device name for the platform
component link. This should be unset when unloading the topology,
otherwise a machine driver unbind/bind or reprobe would complain about
an invalid component as having both its component name and of_node set:

    mt8186_mt6366 sound: ASoC: Both Component name/of_node are set for AFE_SOF_DL1
    mt8186_mt6366 sound: error -EINVAL: Cannot register card
    mt8186_mt6366 sound: probe with driver mt8186_mt6366 failed with error -22

This happens with machine drivers that set the of_node separately.

Clear the SOF link platform name in the topology unload callback.

Fixes: 311ce4fe7637 ("ASoC: SOF: Add support for loading topologies")
Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
---
 sound/soc/sof/topology.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c
index b54382131991..496162df5270 100644
--- a/sound/soc/sof/topology.c
+++ b/sound/soc/sof/topology.c
@@ -2050,6 +2050,8 @@ static int sof_link_unload(struct snd_soc_component *scomp, struct snd_soc_dobj
 	if (!slink)
 		return 0;
 
+	slink->link->platforms->name = NULL;
+
 	kfree(slink->tuples);
 	list_del(&slink->list);
 	kfree(slink->hw_configs);
-- 
2.46.0.184.g6999bdac58-goog