[PATCH 15/15] ASoC: mediatek: mt8192-mt6359: Fix error handling in MTKAIF calibration

[phucduc.bui at gmail.com]

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

mt8192_mt6359_mtkaif_calibration() ignored the return values of
pm_runtime_get_sync() and mt8192_afe_gpio_request(), which could
leave PM runtime references or GPIO state unbalanced on failure.

Switch to pm_runtime_resume_and_get(), check each GPIO request,
and unwind on error.

Fixes: 18b13ff23fab ("ASoC: mediatek: mt8192: add machine driver with mt6359, rt1015 and rt5682")
Signed-off-by: bui duc phuc <phucduc.bui at gmail.com>
---
 .../mt8192/mt8192-mt6359-rt1015-rt5682.c      | 37 +++++++++++++------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c b/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c
index c86348691641..b010726e9b57 100644
--- a/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c
+++ b/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c
@@ -163,12 +163,23 @@ static int mt8192_mt6359_mtkaif_calibration(struct snd_soc_pcm_runtime *rtd)
 	int chosen_phase_1, chosen_phase_2, chosen_phase_3;
 	int counter;
 	int mtkaif_calib_ok;
+	int ret = 0;
 
-	pm_runtime_get_sync(afe->dev);
-	mt8192_afe_gpio_request(afe->dev, true, MT8192_DAI_ADDA, 1);
-	mt8192_afe_gpio_request(afe->dev, true, MT8192_DAI_ADDA, 0);
-	mt8192_afe_gpio_request(afe->dev, true, MT8192_DAI_ADDA_CH34, 1);
-	mt8192_afe_gpio_request(afe->dev, true, MT8192_DAI_ADDA_CH34, 0);
+	ret = pm_runtime_resume_and_get(afe->dev);
+	if (ret < 0)
+		return ret;
+	ret = mt8192_afe_gpio_request(afe->dev, true, MT8192_DAI_ADDA, 1);
+	if (ret)
+		goto err_pm_put;
+	ret = mt8192_afe_gpio_request(afe->dev, true, MT8192_DAI_ADDA, 0);
+	if (ret)
+		goto err_disable_adda_1;
+	ret = mt8192_afe_gpio_request(afe->dev, true, MT8192_DAI_ADDA_CH34, 1);
+	if (ret)
+		goto err_disable_adda_0;
+	ret = mt8192_afe_gpio_request(afe->dev, true, MT8192_DAI_ADDA_CH34, 0);
+	if (ret)
+		goto err_disable_adda_ch34_1;
 
 	mt6359_mtkaif_calibration_enable(cmpnt_codec);
 
@@ -289,10 +300,14 @@ static int mt8192_mt6359_mtkaif_calibration(struct snd_soc_pcm_runtime *rtd)
 
 	mt6359_mtkaif_calibration_disable(cmpnt_codec);
 
-	mt8192_afe_gpio_request(afe->dev, false, MT8192_DAI_ADDA, 1);
-	mt8192_afe_gpio_request(afe->dev, false, MT8192_DAI_ADDA, 0);
-	mt8192_afe_gpio_request(afe->dev, false, MT8192_DAI_ADDA_CH34, 1);
 	mt8192_afe_gpio_request(afe->dev, false, MT8192_DAI_ADDA_CH34, 0);
+err_disable_adda_ch34_1:
+	mt8192_afe_gpio_request(afe->dev, false, MT8192_DAI_ADDA_CH34, 1);
+err_disable_adda_0:
+	mt8192_afe_gpio_request(afe->dev, false, MT8192_DAI_ADDA, 0);
+err_disable_adda_1:
+	mt8192_afe_gpio_request(afe->dev, false, MT8192_DAI_ADDA, 1);
+err_pm_put:
 	pm_runtime_put(afe->dev);
 
 	dev_dbg(afe->dev, "%s(), mtkaif_chosen_phase[0/1/2]:%d/%d/%d\n",
@@ -301,7 +316,7 @@ static int mt8192_mt6359_mtkaif_calibration(struct snd_soc_pcm_runtime *rtd)
 		afe_priv->mtkaif_chosen_phase[1],
 		afe_priv->mtkaif_chosen_phase[2]);
 
-	return 0;
+	return ret;
 }
 
 static int mt8192_mt6359_init(struct snd_soc_pcm_runtime *rtd)
@@ -319,9 +334,7 @@ static int mt8192_mt6359_init(struct snd_soc_pcm_runtime *rtd)
 	afe_priv->mtkaif_protocol = MTKAIF_PROTOCOL_2_CLK_P2;
 
 	/* mtkaif calibration */
-	mt8192_mt6359_mtkaif_calibration(rtd);
-
-	return 0;
+	return mt8192_mt6359_mtkaif_calibration(rtd);
 }
 
 static int mt8192_rt5682_init(struct snd_soc_pcm_runtime *rtd)
-- 
2.43.0