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ASoC: codecs: wcd937x: Fix error handling in wcd937x codec driver 

In wcd937x_bind(), the driver calls of_sdw_find_device_by_node() to
obtain references to RX and TX SoundWire devices, which increment the
device reference counts. However, the corresponding put_device() are
missing in both the error paths and the normal unbind path in
wcd937x_unbind().

Add proper error handling with put_device() calls in all error paths
of wcd937x_bind() and ensure devices are released in wcd937x_unbind().

Found by code review.

Cc: stable@vger.kernel.org
Fixes: 772ed12bd0 ("ASoC: codecs: wcdxxxx: use of_sdw_find_device_by_node helper")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Reviewed-by: David Heidelberg <david@ixit.cz>
Link: https://patch.msgid.link/20251116061623.11830-1-make24@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ma Ke 2025-11-16 14:16:23 +08:00 committed by Mark Brown
parent 6a23ae0a96
commit 578ccfe344
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 34 additions and 9 deletions
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43
sound/soc/codecs/wcd937x.c
View File

@ -2748,7 +2748,8 @@ static int wcd937x_bind(struct device *dev)
wcd937x->rxdev = of_sdw_find_device_by_node(wcd937x->rxnode);
if (!wcd937x->rxdev) {
dev_err(dev, "could not find slave with matching of node\n");
return -EINVAL;
ret = -EINVAL;
goto err_component_unbind;
}
wcd937x->sdw_priv[AIF1_PB] = dev_get_drvdata(wcd937x->rxdev);
@ -2757,7 +2758,8 @@ static int wcd937x_bind(struct device *dev)
wcd937x->txdev = of_sdw_find_device_by_node(wcd937x->txnode);
if (!wcd937x->txdev) {
dev_err(dev, "could not find txslave with matching of node\n");
return -EINVAL;
ret = -EINVAL;
goto err_put_rxdev;
}
wcd937x->sdw_priv[AIF1_CAP] = dev_get_drvdata(wcd937x->txdev);
@ -2765,7 +2767,8 @@ static int wcd937x_bind(struct device *dev)
wcd937x->tx_sdw_dev = dev_to_sdw_dev(wcd937x->txdev);
if (!wcd937x->tx_sdw_dev) {
dev_err(dev, "could not get txslave with matching of dev\n");
return -EINVAL;
ret = -EINVAL;
goto err_put_txdev;
}
/*
@ -2775,31 +2778,35 @@ static int wcd937x_bind(struct device *dev)
if (!device_link_add(wcd937x->rxdev, wcd937x->txdev,
DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME)) {
dev_err(dev, "Could not devlink TX and RX\n");
return -EINVAL;
ret = -EINVAL;
goto err_put_txdev;
}
if (!device_link_add(dev, wcd937x->txdev,
DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME)) {
dev_err(dev, "Could not devlink WCD and TX\n");
return -EINVAL;
ret = -EINVAL;
goto err_remove_link1;
}
if (!device_link_add(dev, wcd937x->rxdev,
DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME)) {
dev_err(dev, "Could not devlink WCD and RX\n");
return -EINVAL;
ret = -EINVAL;
goto err_remove_link2;
}
wcd937x->regmap = wcd937x->sdw_priv[AIF1_CAP]->regmap;
if (!wcd937x->regmap) {
dev_err(dev, "could not get TX device regmap\n");
return -EINVAL;
ret = -EINVAL;
goto err_remove_link3;
}
ret = wcd937x_irq_init(wcd937x, dev);
if (ret) {
dev_err(dev, "IRQ init failed: %d\n", ret);
return ret;
goto err_remove_link3;
}
wcd937x->sdw_priv[AIF1_PB]->slave_irq = wcd937x->virq;
@ -2809,10 +2816,26 @@ static int wcd937x_bind(struct device *dev)
ret = snd_soc_register_component(dev, &soc_codec_dev_wcd937x,
wcd937x_dais, ARRAY_SIZE(wcd937x_dais));
if (ret)
if (ret) {
dev_err(dev, "Codec registration failed\n");
goto err_remove_link3;
}
return ret;
err_remove_link3:
device_link_remove(dev, wcd937x->rxdev);
err_remove_link2:
device_link_remove(dev, wcd937x->txdev);
err_remove_link1:
device_link_remove(wcd937x->rxdev, wcd937x->txdev);
err_put_txdev:
put_device(wcd937x->txdev);
err_put_rxdev:
put_device(wcd937x->rxdev);
err_component_unbind:
component_unbind_all(dev, wcd937x);
return ret;
}
static void wcd937x_unbind(struct device *dev)
@ -2825,6 +2848,8 @@ static void wcd937x_unbind(struct device *dev)
device_link_remove(wcd937x->rxdev, wcd937x->txdev);
component_unbind_all(dev, wcd937x);
mutex_destroy(&wcd937x->micb_lock);
put_device(wcd937x->txdev);
put_device(wcd937x->rxdev);
}
static const struct component_master_ops wcd937x_comp_ops = {