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ASoC: hdac_hda: fix page fault issue by removing race 

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@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190807145030.26117-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Keyon Jie 2019-08-07 09:50:30 -05:00 committed by Mark Brown
parent cc352735d4
commit 804cbf4bb0
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 0 deletions
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4
sound/soc/codecs/hdac_hda.c
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@ -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;
}