[PATCH 13/17] ASoC: SOF: sof-audio: revisit sof_pcm_stream_free() error handling and logs

[Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>]

For some reason the existing code stops on the first error, which
potentially leaves the DMA and widgets in a weird state.

Change to free-up all resources even in case of errors.

Also add a more consistent error handling and logs, with the first
error code returned to the caller.

Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
 sound/soc/sof/sof-audio.c | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/sound/soc/sof/sof-audio.c b/sound/soc/sof/sof-audio.c
index e693dcb475e4..b5ca2861edbd 100644
--- a/sound/soc/sof/sof-audio.c
+++ b/sound/soc/sof/sof-audio.c
@@ -834,17 +834,21 @@ int sof_pcm_stream_free(struct snd_sof_dev *sdev, struct snd_pcm_substream *subs
 {
 	const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 	int ret;
+	int err = 0;
 
 	if (spcm->prepared[substream->stream]) {
 		/* stop DMA first if needed */
 		if (pcm_ops && pcm_ops->platform_stop_during_hw_free)
 			snd_sof_pcm_platform_trigger(sdev, substream, SNDRV_PCM_TRIGGER_STOP);
 
-		/* Send PCM_FREE IPC to reset pipeline */
+		/* free PCM in the DSP */
 		if (pcm_ops && pcm_ops->hw_free) {
 			ret = pcm_ops->hw_free(sdev->component, substream);
-			if (ret < 0)
-				return ret;
+			if (ret < 0) {
+				dev_err(sdev->dev, "%s: pcm_ops hw_free failed %d\n",
+					__func__, ret);
+				err = ret;
+			}
 		}
 
 		spcm->prepared[substream->stream] = false;
@@ -852,17 +856,25 @@ int sof_pcm_stream_free(struct snd_sof_dev *sdev, struct snd_pcm_substream *subs
 
 	/* reset the DMA */
 	ret = snd_sof_pcm_platform_hw_free(sdev, substream);
-	if (ret < 0)
-		return ret;
+	if (ret < 0) {
+		dev_err(sdev->dev, "%s: platform hw free failed %d\n",
+			__func__, ret);
+		if (!err)
+			err = ret;
+	}
 
 	/* free widget list */
 	if (free_widget_list) {
 		ret = sof_widget_list_free(sdev, spcm, dir);
-		if (ret < 0)
-			dev_err(sdev->dev, "failed to free widgets during suspend\n");
+		if (ret < 0) {
+			dev_err(sdev->dev, "%s: sof_widget_list_free failed %d\n",
+				__func__, ret);
+			if (!err)
+				err = ret;
+		}
 	}
 
-	return ret;
+	return err;
 }
 
 /*
-- 
2.40.1