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Message-Id: <20190922184350.30563-57-sashal@kernel.org>
Date: Sun, 22 Sep 2019 14:41:23 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Keyon Jie <yang.jie@...ux.intel.com>,
Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
Mark Brown <broonie@...nel.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.3 057/203] ASoC: hdac_hda: fix page fault issue by removing race
From: Keyon Jie <yang.jie@...ux.intel.com>
[ Upstream commit 804cbf4bb063204ca6c2471baa694548aab02ce3 ]
There is a race between hda codec device removing and the
jack-detecting work, which will lead to a page fault issue as the
latter work is accessing codec device which could be already removed.
Here add the cancellation of jack-detecting work before codecs are actually
removed to avoid the race and fix the issue.
Bug: https://github.com/thesofproject/linux/issues/1067
Signed-off-by: Keyon Jie <yang.jie@...ux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Link: https://lore.kernel.org/r/20190807145030.26117-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
sound/soc/codecs/hdac_hda.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/sound/soc/codecs/hdac_hda.c b/sound/soc/codecs/hdac_hda.c
index 7d49402569149..91242b6f8ea7a 100644
--- a/sound/soc/codecs/hdac_hda.c
+++ b/sound/soc/codecs/hdac_hda.c
@@ -495,6 +495,10 @@ static int hdac_hda_dev_probe(struct hdac_device *hdev)
static int hdac_hda_dev_remove(struct hdac_device *hdev)
{
+ struct hdac_hda_priv *hda_pvt;
+
+ hda_pvt = dev_get_drvdata(&hdev->dev);
+ cancel_delayed_work_sync(&hda_pvt->codec.jackpoll_work);
return 0;
}
--
2.20.1
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