linux-kernel - [PATCH] ASoC: rt5663: Handle device_property_read_u32

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Message-Id: <20211215031550.70702-1-jiasheng@iscas.ac.cn>
Date:   Wed, 15 Dec 2021 11:15:50 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     oder_chiou@...ltek.com, lgirdwood@...il.com, broonie@...nel.org,
        perex@...ex.cz, tiwai@...e.com
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] ASoC: rt5663: Handle device_property_read_u32_array error codes

The return value of device_property_read_u32_array() is not always 0.
To catch the exception in case that devm_kzalloc failed and the
rt5663->imp_table was NULL, which caused the failure of
device_property_read_u32_array.

Fixes: 450f0f6a8fb4 ("ASoC: rt5663: Add the manual offset field to compensate the DC offset")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 sound/soc/codecs/rt5663.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/rt5663.c b/sound/soc/codecs/rt5663.c
index be9fc58ff681..ee09ccd448dc 100644
--- a/sound/soc/codecs/rt5663.c
+++ b/sound/soc/codecs/rt5663.c
@@ -3461,6 +3461,7 @@ static void rt5663_calibrate(struct rt5663_priv *rt5663)
 static int rt5663_parse_dp(struct rt5663_priv *rt5663, struct device *dev)
 {
 	int table_size;
+	int ret;
 
 	device_property_read_u32(dev, "realtek,dc_offset_l_manual",
 		&rt5663->pdata.dc_offset_l_manual);
@@ -3477,9 +3478,11 @@ static int rt5663_parse_dp(struct rt5663_priv *rt5663, struct device *dev)
 		table_size = sizeof(struct impedance_mapping_table) *
 			rt5663->pdata.impedance_sensing_num;
 		rt5663->imp_table = devm_kzalloc(dev, table_size, GFP_KERNEL);
-		device_property_read_u32_array(dev,
+		ret = device_property_read_u32_array(dev,
 			"realtek,impedance_sensing_table",
 			(u32 *)rt5663->imp_table, table_size);
+		if (ret)
+			return ret;
 	}
 
 	return 0;
@@ -3504,8 +3507,11 @@ static int rt5663_i2c_probe(struct i2c_client *i2c,
 
 	if (pdata)
 		rt5663->pdata = *pdata;
-	else
-		rt5663_parse_dp(rt5663, &i2c->dev);
+	else {
+		ret = rt5663_parse_dp(rt5663, &i2c->dev);
+		if (ret)
+			return ret;
+	}
 
 	for (i = 0; i < ARRAY_SIZE(rt5663->supplies); i++)
 		rt5663->supplies[i].supply = rt5663_supply_names[i];
-- 
2.25.1