ASoC: SOF: Intel: hda: hda-dai: fix oops on hda_link .hw_free

When the PCM_PARAM IPC fails while configuring the FE, the kernel
oopses in the HDaudio link DMA .hw_free operation. The root cause is a
NULL dma_data since the BE .hw_params was never called by the SOC
core.

This error can also happen if the HDaudio link DMA configuration IPC
fails in the BE .hw_params.

This patches makes sure the dma_data is properly saved in .hw_params,
and tested before being use in hw_free.

GitHub issue: https://github.com/thesofproject/linux/issues/1417

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191218000518.5830-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

0 files changed, 0 insertions, 0 deletions