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ASoC: rt7*-sdw: harden jack_detect_handler 

Realtek headset codec drivers typically check if the card is
instantiated before proceeding with the jack detection.

The rt700, rt711 and rt711-sdca are however missing a check on the
card pointer, which can lead to NULL dereferences encountered in
driver bind/unbind tests.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220606203752.144159-6-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2022-06-06 15:37:50 -05:00 committed by Mark Brown
parent 08bb5dc6ce
commit 0484271ab0
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
3 changed files with 3 additions and 3 deletions
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2
sound/soc/codecs/rt700.c
View File

@ -162,7 +162,7 @@ static void rt700_jack_detect_handler(struct work_struct *work)
if (!rt700->hs_jack)
return;
if (!rt700->component->card->instantiated)
if (!rt700->component->card || !rt700->component->card->instantiated)
return;
reg = RT700_VERB_GET_PIN_SENSE | RT700_HP_OUT;

2
sound/soc/codecs/rt711-sdca.c
View File

@ -294,7 +294,7 @@ static void rt711_sdca_jack_detect_handler(struct work_struct *work)
if (!rt711->hs_jack)
return;
if (!rt711->component->card->instantiated)
if (!rt711->component->card || !rt711->component->card->instantiated)
return;
/* SDW_SCP_SDCA_INT_SDCA_0 is used for jack detection */

2
sound/soc/codecs/rt711.c
View File

@ -242,7 +242,7 @@ static void rt711_jack_detect_handler(struct work_struct *work)
if (!rt711->hs_jack)
return;
if (!rt711->component->card->instantiated)
if (!rt711->component->card || !rt711->component->card->instantiated)
return;
if (pm_runtime_status_suspended(rt711->slave->dev.parent)) {