ASoC: Intel: sof_sdw_rt711: remove properties in card remove

The rt711 jack detection properties are set from the machine drivers
during the card probe, as done in other ASoC examples.

KASAN reports a use-after-free error when unbinding drivers due to a
confusing sequence between the ACPI core, the device core and the
SoundWire device cleanups.

Rather than fixing this sequence, follow the recommendation to have
the same caller add and remove properties, add an explicit
device_remove_properties() in the card .remove() callback.

In future patches the use of device_add/remove_properties will be
replaced by a direct handling of a swnode, but the sequence will
remain the same.
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200717211337.31956-3-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/sof_sdw.c

@@ -217,6 +217,7 @@ static struct sof_sdw_codec_info codec_info_list[] = {
 		.direction = {true, true},
 		.dai_name = "rt711-aif1",
 		.init = sof_sdw_rt711_init,
+		.exit = sof_sdw_rt711_exit,
 	},
 	{
 		.id = 0x1308,

sound/soc/intel/boards/sof_sdw_common.h

@@ -91,6 +91,7 @@ int sof_sdw_rt711_init(const struct snd_soc_acpi_link_adr *link,
 		       struct snd_soc_dai_link *dai_links,
 		       struct sof_sdw_codec_info *info,
 		       bool playback);
+int sof_sdw_rt711_exit(struct device *dev, struct snd_soc_dai_link *dai_link);
 
 /* RT700 support */
 int sof_sdw_rt700_init(const struct snd_soc_acpi_link_adr *link,

sound/soc/intel/boards/sof_sdw_rt711.c

@@ -133,6 +133,21 @@ static int rt711_rtd_init(struct snd_soc_pcm_runtime *rtd)
 	return ret;
 }
 
+int sof_sdw_rt711_exit(struct device *dev, struct snd_soc_dai_link *dai_link)
+{
+	struct device *sdw_dev;
+
+	sdw_dev = bus_find_device_by_name(&sdw_bus_type, NULL,
+					  dai_link->codecs[0].name);
+	if (!sdw_dev)
+		return -EINVAL;
+
+	device_remove_properties(sdw_dev);
+	put_device(sdw_dev);
+
+	return 0;
+}
+
 int sof_sdw_rt711_init(const struct snd_soc_acpi_link_adr *link,
 		       struct snd_soc_dai_link *dai_links,
 		       struct sof_sdw_codec_info *info,