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ASoC: cpcap: Check for NULL pointer after calling of_get_child_by_name

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commit f7a6021aaf upstream.

If the device does not exist, of_get_child_by_name() will return NULL
pointer.
And devm_snd_soc_register_component() does not check it.
Also, I have noticed that cpcap_codec_driver has not been used yet.
Therefore, it should be better to check it in order to avoid the future
dereference of the NULL pointer.

Fixes: f6cdf2d344 ("ASoC: cpcap: new codec")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20220111025048.524134-1-jiasheng@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiasheng Jiang 2022-01-11 10:50:48 +08:00 committed by Greg Kroah-Hartman
parent cb5f1fbd1f
commit 02f4597198
1 changed files with 2 additions and 0 deletions
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2
sound/soc/codecs/cpcap.c
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@ -1544,6 +1544,8 @@ static int cpcap_codec_probe(struct platform_device *pdev)
{ {
struct device_node *codec_node = struct device_node *codec_node =
of_get_child_by_name(pdev->dev.parent->of_node, "audio-codec"); of_get_child_by_name(pdev->dev.parent->of_node, "audio-codec");
if (!codec_node)
return -ENODEV;
pdev->dev.of_node = codec_node; pdev->dev.of_node = codec_node;