mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-02 15:18:19 +00:00
Code Issues Releases Wiki Activity

soundwire: cadence: allocate/free dma_data in set_sdw_stream

Browse source 
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>
Link: https://lore.kernel.org/r/20200630184356.24939-5-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2020-07-01 02:43:55 +08:00 committed by Vinod Koul
parent ff16d1e584
commit b5e9e687d6
1 changed files with 38 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

52
drivers/soundwire/cadence_master.c
View file

@ -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);