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ASoC: rt5640: Fix possible NULL pointer deref on resume

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Commit 2b9c8d2b3c ("ASoC: rt5640: Add the HDA header support") adds
re-queuing of the jack_work on resume when rt5640->jd_src != 0.

But the jack_work will unconditionally deref rt5640->jack and that might
be NULL. E.g. the sound/soc/intel/boards/bytcr_rt5640.c machine driver
call snd_soc_component_set_jack(codec, NULL, NULL) from pre_suspend to
disable the IRQ to avoid spurious wakeups, so when rt5640_resume()
runs rt5640->jack will be NULL in this case.

Make the queueing of the work conditional on rt5640->jack instead of
on rt5640->jd_src to fix this.

Fixes: 2b9c8d2b3c ("ASoC: rt5640: Add the HDA header support")
Cc: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220106110128.66049-2-hdegoede@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Hans de Goede 2022-01-06 12:01:23 +01:00 committed by Mark Brown
parent e4c35e7520
commit a2d6d84db2
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 1 additions and 1 deletions
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2
sound/soc/codecs/rt5640.c
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@ -2737,7 +2737,7 @@ static int rt5640_resume(struct snd_soc_component *component)
regcache_cache_only(rt5640->regmap, false);
regcache_sync(rt5640->regmap);
if (rt5640->jd_src) {
if (rt5640->jack) {
if (rt5640->jd_src == RT5640_JD_SRC_HDA_HEADER)
snd_soc_component_update_bits(component,
RT5640_DUMMY2, 0x1100, 0x1100);