[PATCH v4 14/15] soundwire: intel: free all resources on hw_free()

Pierre-Louis Bossart
2019-12-13T05:04:50Z

Make sure all calls to the SoundWire stream API are done and involve
callback

Signed-off-by: Rander Wang <rander.wang@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
drivers/soundwire/intel.c | 40 +++++++++++++++++++++++++++++++++++++--
1 file changed, 38 insertions(+), 2 deletions(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 30b0ff5b7abd..1e293e7374ed 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -549,6 +549,25 @@ static int intel_params_stream(struct sdw_intel *sdw,
return -EIO;
}

+static int intel_free_stream(struct sdw_intel *sdw,
+ struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai,
+ int link_id)
+{
+ struct sdw_intel_link_res *res = sdw->link_res;
+ struct sdw_intel_stream_free_data free_data;
+
+ free_data.substream = substream;
+ free_data.dai = dai;
+ free_data.link_id = link_id;
+
+ if (res->ops && res->ops->free_stream && res->dev)
+ return res->ops->free_stream(res->dev,
+ &free_data);
+
+ return 0;
+}
+
/*
* bank switch routines
*/
@@ -817,6 +836,7 @@ static int
intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
{
struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+ struct sdw_intel *sdw = cdns_to_intel(cdns);
struct sdw_cdns_dma_data *dma;
int ret;

@@ -824,12 +844,28 @@ intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
if (!dma)
return -EIO;

+ ret = sdw_deprepare_stream(dma->stream);
+ if (ret) {
+ dev_err(dai->dev, "sdw_deprepare_stream: failed %d", ret);
+ return ret;
+ }
+
ret = sdw_stream_remove_master(&cdns->bus, dma->stream);
- if (ret < 0)
+ if (ret < 0) {
dev_err(dai->dev, "remove master from stream %s failed: %d\n",
dma->stream->name, ret);
+ return ret;
+ }

- return ret;
+ ret = intel_free_stream(sdw, substream, dai, sdw->instance);
+ if (ret < 0) {
+ dev_err(dai->dev, "intel_free_stream: failed %d", ret);
+ return ret;
+ }
+
+ sdw_release_stream(dma->stream);
+
+ return 0;
}

static void intel_shutdown(struct snd_pcm_substream *substream,
--
2.20.1