[PATCH] ASoC: mediatek: mt2701: allocate i2s_path with priv

[Rosen Penev <rosenp@gmail.com>]

Use a flexible array member to combine allocations.

Clean up surrounding code and allocate based on afe_priv and not
platform_priv which is a void pointer. struct_size needs a properly
typed pointer to work.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 sound/soc/mediatek/mt2701/mt2701-afe-common.h |  2 +-
 sound/soc/mediatek/mt2701/mt2701-afe-pcm.c    | 21 ++++++++-----------
 2 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/sound/soc/mediatek/mt2701/mt2701-afe-common.h b/sound/soc/mediatek/mt2701/mt2701-afe-common.h
index 8b6f3a200048..c9477bc24ee9 100644
--- a/sound/soc/mediatek/mt2701/mt2701-afe-common.h
+++ b/sound/soc/mediatek/mt2701/mt2701-afe-common.h
@@ -89,7 +89,6 @@ struct mt2701_soc_variants {
 };
 
 struct mt2701_afe_private {
-	struct mt2701_i2s_path *i2s_path;
 	struct clk *base_ck[MT2701_BASE_CLK_NUM];
 	struct clk *mrgif_ck;
 	struct clk *hadds2pll_ck;
@@ -99,6 +98,7 @@ struct mt2701_afe_private {
 	bool mrg_enable[MTK_STREAM_NUM];
 
 	const struct mt2701_soc_variants *soc;
+	struct mt2701_i2s_path i2s_path[];
 };
 
 #endif
diff --git a/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c b/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
index bb459faa6e05..d56b498e8c0c 100644
--- a/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
+++ b/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
@@ -1593,6 +1593,7 @@ static int mt2701_afe_runtime_resume(struct device *dev)
 
 static int mt2701_afe_pcm_dev_probe(struct platform_device *pdev)
 {
+	const struct mt2701_soc_variants *soc;
 	struct mtk_base_afe *afe;
 	struct mt2701_afe_private *afe_priv;
 	struct device *dev;
@@ -1602,23 +1603,19 @@ static int mt2701_afe_pcm_dev_probe(struct platform_device *pdev)
 	if (!afe)
 		return -ENOMEM;
 
-	afe->platform_priv = devm_kzalloc(&pdev->dev, sizeof(*afe_priv),
-					  GFP_KERNEL);
-	if (!afe->platform_priv)
+	soc = of_device_get_match_data(&pdev->dev);
+	afe_priv = devm_kzalloc(&pdev->dev,
+			struct_size(afe_priv, i2s_path, soc->i2s_num),
+			GFP_KERNEL);
+	if (!afe_priv)
 		return -ENOMEM;
 
-	afe_priv = afe->platform_priv;
-	afe_priv->soc = of_device_get_match_data(&pdev->dev);
+	afe_priv->soc = soc;
+
+	afe->platform_priv = afe_priv;
 	afe->dev = &pdev->dev;
 	dev = afe->dev;
 
-	afe_priv->i2s_path = devm_kcalloc(dev,
-					  afe_priv->soc->i2s_num,
-					  sizeof(struct mt2701_i2s_path),
-					  GFP_KERNEL);
-	if (!afe_priv->i2s_path)
-		return -ENOMEM;
-
 	irq_id = platform_get_irq_byname(pdev, "asys");
 	if (irq_id < 0)
 		return irq_id;
-- 
2.54.0