From: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx> [ Upstream commit 82bb8db96610b558920b8c57cd250ec90567d79b ] The HDaudio specification Section 3.6.2 limits the number of BDL entries to 256. Make sure we don't allow more periods than this normative value. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> Link: https://patch.msgid.link/20240704090106.371497-1-pierre-louis.bossart@xxxxxxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- sound/soc/sof/intel/hda-pcm.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sound/soc/sof/intel/hda-pcm.c b/sound/soc/sof/intel/hda-pcm.c index d7b446f3f973e..8b5fbbc777bd4 100644 --- a/sound/soc/sof/intel/hda-pcm.c +++ b/sound/soc/sof/intel/hda-pcm.c @@ -254,6 +254,12 @@ int hda_dsp_pcm_open(struct snd_sof_dev *sdev, snd_pcm_hw_constraint_integer(substream->runtime, SNDRV_PCM_HW_PARAM_PERIODS); + /* Limit the maximum number of periods to not exceed the BDL entries count */ + if (runtime->hw.periods_max > HDA_DSP_MAX_BDL_ENTRIES) + snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, + runtime->hw.periods_min, + HDA_DSP_MAX_BDL_ENTRIES); + /* Only S16 and S32 supported by HDA hardware when used without DSP */ if (sdev->dspless_mode_selected) snd_pcm_hw_constraint_mask64(substream->runtime, SNDRV_PCM_HW_PARAM_FORMAT, -- 2.43.0
