[PATCH v3 2/8] ASoC: mediatek: mt8186: Fix clock handling in mux disable path

[phucduc.bui at gmail.com]

From: bui duc phuc <phucduc.bui at gmail.com>

In the disable path of the appl*_mux_setting() functions,
clk_disable_unprepare() is called after clk_set_parent().
If clk_set_parent() fails, clk_disable_unprepare() is skipped,
potentially leaving one of the clocks enabled.

Move the clk_disable_unprepare() calls before clk_set_parent()
so that the clocks are always disabled and unprepared in the
disable path.

Fixes: 55b423d5623c ("ASoC: mediatek: mt8186: support audio clock control in platform driver")
Signed-off-by: bui duc phuc <phucduc.bui at gmail.com>
---
 sound/soc/mediatek/mt8186/mt8186-afe-clk.c | 70 +++++++++++-----------
 1 file changed, 36 insertions(+), 34 deletions(-)

diff --git a/sound/soc/mediatek/mt8186/mt8186-afe-clk.c b/sound/soc/mediatek/mt8186/mt8186-afe-clk.c
index aa8b2eaf7b95..a517aa67abf6 100644
--- a/sound/soc/mediatek/mt8186/mt8186-afe-clk.c
+++ b/sound/soc/mediatek/mt8186/mt8186-afe-clk.c
@@ -125,25 +125,26 @@ static int apll1_mux_setting(struct mtk_base_afe *afe, bool enable)
 			goto ERR_SELECT_CLK_TOP_MUX_AUD_ENG1;
 		}
 	} else {
-		ret = clk_set_parent(afe_priv->clk[CLK_TOP_MUX_AUD_ENG1],
-				     afe_priv->clk[CLK_CLK26M]);
-		if (ret) {
-			dev_err(afe->dev, "%s clk_set_parent %s-%s fail %d\n",
-				__func__, aud_clks[CLK_TOP_MUX_AUD_ENG1],
-				aud_clks[CLK_CLK26M], ret);
-			goto EXIT;
-		}
 		clk_disable_unprepare(afe_priv->clk[CLK_TOP_MUX_AUD_ENG1]);
-
-		ret = clk_set_parent(afe_priv->clk[CLK_TOP_MUX_AUD_1],
-				     afe_priv->clk[CLK_CLK26M]);
-		if (ret) {
-			dev_err(afe->dev, "%s clk_set_parent %s-%s fail %d\n",
-				__func__, aud_clks[CLK_TOP_MUX_AUD_1],
-				aud_clks[CLK_CLK26M], ret);
-			goto EXIT;
-		}
 		clk_disable_unprepare(afe_priv->clk[CLK_TOP_MUX_AUD_1]);
+
+		ret = clk_set_parent(afe_priv->clk[CLK_TOP_MUX_AUD_ENG1],
+				     afe_priv->clk[CLK_CLK26M]);
+		if (ret) {
+			dev_err(afe->dev, "%s clk_set_parent %s-%s fail %d\n",
+				__func__, aud_clks[CLK_TOP_MUX_AUD_ENG1],
+				aud_clks[CLK_CLK26M], ret);
+			goto EXIT;
+		}
+
+		ret = clk_set_parent(afe_priv->clk[CLK_TOP_MUX_AUD_1],
+				     afe_priv->clk[CLK_CLK26M]);
+		if (ret) {
+			dev_err(afe->dev, "%s clk_set_parent %s-%s fail %d\n",
+				__func__, aud_clks[CLK_TOP_MUX_AUD_1],
+				aud_clks[CLK_CLK26M], ret);
+			goto EXIT;
+		}
 	}
 
 	return 0;
@@ -199,25 +200,26 @@ static int apll2_mux_setting(struct mtk_base_afe *afe, bool enable)
 			goto ERR_SELECT_CLK_TOP_MUX_AUD_ENG2;
 		}
 	} else {
-		ret = clk_set_parent(afe_priv->clk[CLK_TOP_MUX_AUD_ENG2],
-				     afe_priv->clk[CLK_CLK26M]);
-		if (ret) {
-			dev_err(afe->dev, "%s clk_set_parent %s-%s fail %d\n",
-				__func__, aud_clks[CLK_TOP_MUX_AUD_ENG2],
-				aud_clks[CLK_CLK26M], ret);
-			goto EXIT;
-		}
 		clk_disable_unprepare(afe_priv->clk[CLK_TOP_MUX_AUD_ENG2]);
-
-		ret = clk_set_parent(afe_priv->clk[CLK_TOP_MUX_AUD_2],
-				     afe_priv->clk[CLK_CLK26M]);
-		if (ret) {
-			dev_err(afe->dev, "%s clk_set_parent %s-%s fail %d\n",
-				__func__, aud_clks[CLK_TOP_MUX_AUD_2],
-				aud_clks[CLK_CLK26M], ret);
-			goto EXIT;
-		}
 		clk_disable_unprepare(afe_priv->clk[CLK_TOP_MUX_AUD_2]);
+
+		ret = clk_set_parent(afe_priv->clk[CLK_TOP_MUX_AUD_ENG2],
+				     afe_priv->clk[CLK_CLK26M]);
+		if (ret) {
+			dev_err(afe->dev, "%s clk_set_parent %s-%s fail %d\n",
+				__func__, aud_clks[CLK_TOP_MUX_AUD_ENG2],
+				aud_clks[CLK_CLK26M], ret);
+			goto EXIT;
+		}
+
+		ret = clk_set_parent(afe_priv->clk[CLK_TOP_MUX_AUD_2],
+				     afe_priv->clk[CLK_CLK26M]);
+		if (ret) {
+			dev_err(afe->dev, "%s clk_set_parent %s-%s fail %d\n",
+				__func__, aud_clks[CLK_TOP_MUX_AUD_2],
+				aud_clks[CLK_CLK26M], ret);
+			goto EXIT;
+		}
 	}
 
 	return 0;
-- 
2.43.0