[PATCH 1/2] ASoC: adau1372: Fix unchecked clk_prepare_enable() return value

[Jihed Chaibi]

adau1372_set_power() calls clk_prepare_enable() but discards the return
value. If the clock enable fails, the driver proceeds to access registers
on unpowered hardware, potentially causing silent corruption.

Make adau1372_set_power() return int and propagate the error from
clk_prepare_enable(). Update adau1372_set_bias_level() to return the
error directly for the STANDBY and OFF cases.

Signed-off-by: Jihed Chaibi <jihed.chaibi.dev@xxxxxxxxx>
---
 sound/soc/codecs/adau1372.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/adau1372.c b/sound/soc/codecs/adau1372.c
index fdee689cae53..6345342218d6 100644
--- a/sound/soc/codecs/adau1372.c
+++ b/sound/soc/codecs/adau1372.c
@@ -782,15 +782,18 @@ static void adau1372_enable_pll(struct adau1372 *adau1372)
 		dev_err(adau1372->dev, "Failed to lock PLL\n");
 }
 
-static void adau1372_set_power(struct adau1372 *adau1372, bool enable)
+static int adau1372_set_power(struct adau1372 *adau1372, bool enable)
 {
 	if (adau1372->enabled == enable)
-		return;
+		return 0;
 
 	if (enable) {
 		unsigned int clk_ctrl = ADAU1372_CLK_CTRL_MCLK_EN;
+		int ret;
 
-		clk_prepare_enable(adau1372->mclk);
+		ret = clk_prepare_enable(adau1372->mclk);
+		if (ret)
+			return ret;
 		if (adau1372->pd_gpio)
 			gpiod_set_value(adau1372->pd_gpio, 0);
 
@@ -829,6 +832,8 @@ static void adau1372_set_power(struct adau1372 *adau1372, bool enable)
 	}
 
 	adau1372->enabled = enable;
+
+	return 0;
 }
 
 static int adau1372_set_bias_level(struct snd_soc_component *component,
@@ -842,11 +847,9 @@ static int adau1372_set_bias_level(struct snd_soc_component *component,
 	case SND_SOC_BIAS_PREPARE:
 		break;
 	case SND_SOC_BIAS_STANDBY:
-		adau1372_set_power(adau1372, true);
-		break;
+		return adau1372_set_power(adau1372, true);
 	case SND_SOC_BIAS_OFF:
-		adau1372_set_power(adau1372, false);
-		break;
+		return adau1372_set_power(adau1372, false);
 	}
 
 	return 0;
-- 
2.47.3