From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
The current memory allocation is somewhat strange: the dma_data is allocated in set_sdw_stream, but released in the intel DAI shutdown. This no longer works with the multi-cpu implementation, since the dma_data is released in the dai shutdown which takes place before the dailink shutdown.
Move to a more symmetric allocation where the dma_data is allocated with non-NULL SoundWire stream, and conversely released when a NULL stream is provided - for consistency with the stream startup and shutdown operations.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Bard Liao yung-chuan.liao@linux.intel.com --- drivers/soundwire/cadence_master.c | 52 ++++++++++++++++++++++-------- 1 file changed, 38 insertions(+), 14 deletions(-)
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 9ea87538b9ef..613dbd415b91 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -1437,25 +1437,49 @@ int cdns_set_sdw_stream(struct snd_soc_dai *dai, struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); struct sdw_cdns_dma_data *dma;
- dma = kzalloc(sizeof(*dma), GFP_KERNEL); - if (!dma) - return -ENOMEM; + if (stream) { + /* first paranoia check */ + if (direction == SNDRV_PCM_STREAM_PLAYBACK) + dma = dai->playback_dma_data; + else + dma = dai->capture_dma_data;
- if (pcm) - dma->stream_type = SDW_STREAM_PCM; - else - dma->stream_type = SDW_STREAM_PDM; + if (dma) { + dev_err(dai->dev, + "dma_data already allocated for dai %s\n", + dai->name); + return -EINVAL; + }
- dma->bus = &cdns->bus; - dma->link_id = cdns->instance; + /* allocate and set dma info */ + dma = kzalloc(sizeof(*dma), GFP_KERNEL); + if (!dma) + return -ENOMEM;
- dma->stream = stream; + if (pcm) + dma->stream_type = SDW_STREAM_PCM; + else + dma->stream_type = SDW_STREAM_PDM;
- if (direction == SNDRV_PCM_STREAM_PLAYBACK) - dai->playback_dma_data = dma; - else - dai->capture_dma_data = dma; + dma->bus = &cdns->bus; + dma->link_id = cdns->instance;
+ dma->stream = stream; + + if (direction == SNDRV_PCM_STREAM_PLAYBACK) + dai->playback_dma_data = dma; + else + dai->capture_dma_data = dma; + } else { + /* for NULL stream we release allocated dma_data */ + if (direction == SNDRV_PCM_STREAM_PLAYBACK) { + kfree(dai->playback_dma_data); + dai->playback_dma_data = NULL; + } else { + kfree(dai->capture_dma_data); + dai->capture_dma_data = NULL; + } + } return 0; } EXPORT_SYMBOL(cdns_set_sdw_stream);