A recent commit "ALSA: hdac: fix memory release for SST and SOF drivers" removed the kfree call for the hdac device in snd_hdac_ext_bus_device_exit(). This requires that the SOF driver also make the hdac_device and hdac_hda_priv device-managed so that they can be freed when the SOF module in unloaded. The first patch takes care of this change.
Additionally, because of the above change, the hda_codec is device-managed and freeing it in snd_hda_codec_dev_release() leads to kernel panic with module unload/reload stress tests. The second patch includes the change to avoid freeing hda_codec for ASoC driver.
More details for the module unload/reload test failures can be found here: https://github.com/thesofproject/linux/issues/966
Ranjani Sridharan (2): ASoC: SOF: Intel: hda: Make hdac_device device-managed ASoC: hda: don't free hda_codec for HDA_DEV_ASOC type
sound/pci/hda/hda_codec.c | 8 +++++++- sound/soc/sof/intel/hda-codec.c | 6 ++---- 2 files changed, 9 insertions(+), 5 deletions(-)