linux-kernel - [PATCH 5.1 14/96] ASoC: core: lock client

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Message-Id: <20190708150527.154167492@linuxfoundation.org>
Date:   Mon,  8 Jul 2019 17:12:46 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.1 14/96] ASoC: core: lock client_mutex while removing link components

[ Upstream commit 34ac3c3eb8f0c07252ceddf0a22dd240e5c91ccb ]

Removing link components results in topology unloading. So,
acquire the client_mutex before removing components in
soc_remove_link_components. This will prevent the lockdep warning
seen when dai links are removed during topology removal.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/soc-core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index a7b4fab92f26..a4668a788ed5 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1008,12 +1008,14 @@ static void soc_remove_link_components(struct snd_soc_card *card,
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
 
+	mutex_lock(&client_mutex);
 	for_each_rtdcom(rtd, rtdcom) {
 		component = rtdcom->component;
 
 		if (component->driver->remove_order == order)
 			soc_remove_component(component);
 	}
+	mutex_unlock(&client_mutex);
 }
 
 static void soc_remove_dai_links(struct snd_soc_card *card)
-- 
2.20.1