When the driver fails during probing, the driver should disable the
regulator, not just handle it in wm8731_hw_init().
The following log reveals it:
[ 17.812483] WARNING: CPU: 1 PID: 364 at drivers/regulator/core.c:2257 _regulator_put+0x3ec/0x4e0
[ 17.815958] RIP: 0010:_regulator_put+0x3ec/0x4e0
[ 17.824467] Call Trace:
[ 17.824774] <TASK>
[ 17.825040] regulator_bulk_free+0x82/0xe0
[ 17.825514] devres_release_group+0x319/0x3d0
[ 17.825882] i2c_device_probe+0x766/0x940
[ 17.829198] i2c_register_driver+0xb5/0x130
Signed-off-by: Zheyu Ma <zheyuma97@xxxxxxxxx>
---
sound/soc/codecs/wm8731.c | 19 +++++++++++--------
1 file changed, 11 insertions(+), 8 deletions(-)
diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index 5d4949c2ec9b..b14c6d104e6d 100644
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -602,7 +602,7 @@ static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
ret = wm8731_reset(wm8731->regmap);
if (ret < 0) {
dev_err(dev, "Failed to issue reset: %d\n", ret);
- goto err_regulator_enable;
+ goto err;
}
/* Clear POWEROFF, keep everything else disabled */
@@ -619,10 +619,7 @@ static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
regcache_mark_dirty(wm8731->regmap);
-err_regulator_enable:
- /* Regulators will be enabled by bias management */
- regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
-
+err:
return ret;
}
@@ -760,21 +757,27 @@ static int wm8731_i2c_probe(struct i2c_client *i2c,
ret = PTR_ERR(wm8731->regmap);
dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
ret);
- return ret;
+ goto err_regulator_enable;
}
ret = wm8731_hw_init(&i2c->dev, wm8731);
if (ret != 0)
- return ret;
+ goto err_regulator_enable;
ret = devm_snd_soc_register_component(&i2c->dev,
&soc_component_dev_wm8731, &wm8731_dai, 1);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
- return ret;
+ goto err_regulator_enable;
}
return 0;
+
+err_regulator_enable:
+ /* Regulators will be enabled by bias management */
+ regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
+
+ return ret;
}
static const struct i2c_device_id wm8731_i2c_id[] = {
--
2.25.1
