ASoC: SOF: align the hw_free sequence with stop

Even though the order of stopping the DMA and freeing the widget list is
not important, align the sequence to match with the stop trigger to
avoid confusion.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20211125101520.291581-9-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/pcm.c

@@ -299,22 +299,26 @@ static int sof_pcm_hw_free(struct snd_soc_component *component,
 	dev_dbg(component->dev, "pcm: free stream %d dir %d\n",
 		spcm->pcm.pcm_id, substream->stream);
 
+	/* free PCM in the DSP */
 	ret = sof_pcm_dsp_pcm_free(substream, sdev, spcm);
 	if (ret < 0)
 		err = ret;
 
-	ret = sof_widget_list_free(sdev, spcm, substream->stream);
-	if (ret < 0)
-		err = ret;
-
-	cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
 
+	/* stop DMA */
 	ret = snd_sof_pcm_platform_hw_free(sdev, substream);
 	if (ret < 0) {
 		dev_err(component->dev, "error: platform hw free failed\n");
 		err = ret;
 	}
 
+	/* free the DAPM widget list */
+	ret = sof_widget_list_free(sdev, spcm, substream->stream);
+	if (ret < 0)
+		err = ret;
+
+	cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
+
 	return err;
 }