Unverified Commit f7a6021a authored by 蒋家盛's avatar 蒋家盛 Committed by Mark Brown
Browse files

ASoC: cpcap: Check for NULL pointer after calling of_get_child_by_name 



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: f6cdf2d3 ("ASoC: cpcap: new codec")
Signed-off-by: default avatarJiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20220111025048.524134-1-jiasheng@iscas.ac.cn


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent a64067f4

sound/soc/codecs/cpcap.c

+2 −0
Original line number Diff line number Diff line
@@ -1667,6 +1667,8 @@ static int cpcap_codec_probe(struct platform_device *pdev) 
{

	struct device_node *codec_node =

		of_get_child_by_name(pdev->dev.parent->of_node, "audio-codec");

	if (!codec_node)

		return -ENODEV;



	pdev->dev.of_node = codec_node;