From 321add801bcd186c6b5477c0857521e127dbf016 Mon Sep 17 00:00:00 2001
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Date: Fri, 15 Jul 2022 09:52:16 -0500
Subject: [PATCH] ASoC: SOF: Intel: hda-stream: test DMA buffer first in hw_params
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Git-commit: 321add801bcd186c6b5477c0857521e127dbf016
Patch-mainline: v6.0-rc1
References: jsc#PED-850

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@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220715145216.277003-12-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 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 |
-- 
2.35.3