diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2019-12-17 18:05:17 -0600 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-12-18 19:49:42 +0000 |
| commit | 921162c81a089aa2f442103290f1af9ba281fc9f (patch) | |
| tree | fa47aaed7bcc157b7d109fc3748b25e1757e0087 /sound | |
| parent | b06e46427f987bf83dcb6a69516b57276eb8ec0c (diff) | |
ASoC: SOF: Intel: hda: hda-dai: fix oops on hda_link .hw_free
When the PCM_PARAM IPC fails while configuring the FE, the kernel
oopses in the HDaudio link DMA .hw_free operation. The root cause is a
NULL dma_data since the BE .hw_params was never called by the SOC
core.
This error can also happen if the HDaudio link DMA configuration IPC
fails in the BE .hw_params.
This patches makes sure the dma_data is properly saved in .hw_params,
and tested before being use in hw_free.
GitHub issue: https://github.com/thesofproject/linux/issues/1417
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191218000518.5830-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/sof/intel/hda-dai.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sound/soc/sof/intel/hda-dai.c b/sound/soc/sof/intel/hda-dai.c index 8796f385be76..896d21984b73 100644 --- a/sound/soc/sof/intel/hda-dai.c +++ b/sound/soc/sof/intel/hda-dai.c @@ -216,6 +216,8 @@ static int hda_link_hw_params(struct snd_pcm_substream *substream, link_dev = hda_link_stream_assign(bus, substream); if (!link_dev) return -EBUSY; + + snd_soc_dai_set_dma_data(dai, substream, (void *)link_dev); } stream_tag = hdac_stream(link_dev)->stream_tag; @@ -228,8 +230,6 @@ static int hda_link_hw_params(struct snd_pcm_substream *substream, if (ret < 0) return ret; - snd_soc_dai_set_dma_data(dai, substream, (void *)link_dev); - link = snd_hdac_ext_bus_get_link(bus, codec_dai->component->name); if (!link) return -EINVAL; @@ -361,6 +361,13 @@ static int hda_link_hw_free(struct snd_pcm_substream *substream, bus = hstream->bus; rtd = snd_pcm_substream_chip(substream); link_dev = snd_soc_dai_get_dma_data(dai, substream); + + if (!link_dev) { + dev_dbg(dai->dev, + "%s: link_dev is not assigned\n", __func__); + return -EINVAL; + } + hda_stream = hstream_to_sof_hda_stream(link_dev); /* free the link DMA channel in the FW */ |