[PATCH 11/11] ASoC: SOF: Intel: hda-stream: test DMA buffer first in hw_params

[Pierre-Louis Bossart]

We should be consistent and always test that the DMA buffer is
allocated before continuing with the hw_params setup.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi at linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao at linux.intel.com>
---
 sound/soc/sof/intel/hda-stream.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c
index 4531e1ee5ed0..b58662faa4aa 100644
--- a/sound/soc/sof/intel/hda-stream.c
+++ b/sound/soc/sof/intel/hda-stream.c
@@ -411,6 +411,11 @@ int hda_dsp_iccmax_stream_hw_params(struct snd_sof_dev *sdev, struct hdac_ext_st
 		return -ENODEV;
 	}
 
+	if (!dmab) {
+		dev_err(sdev->dev, "error: no dma buffer allocated!\n");
+		return -ENODEV;
+	}
+
 	if (hstream->posbuf)
 		*hstream->posbuf = 0;
 
@@ -485,16 +490,16 @@ int hda_dsp_stream_hw_params(struct snd_sof_dev *sdev,
 		return -ENODEV;
 	}
 
-	/* decouple host and link DMA */
-	mask = 0x1 << hstream->index;
-	snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
-				mask, mask);
-
 	if (!dmab) {
 		dev_err(sdev->dev, "error: no dma buffer allocated!\n");
 		return -ENODEV;
 	}
 
+	/* decouple host and link DMA */
+	mask = 0x1 << hstream->index;
+	snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
+				mask, mask);
+
 	/* clear stream status */
 	snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, sd_offset,
 				SOF_HDA_CL_DMA_SD_INT_MASK |
-- 
2.34.1