mirror of https://gitee.com/openkylin/linux.git
ASoC: meson: axg-card: fix null pointer dereference in clean up
When using modern dai_link style, we must first make sure the
struct snd_soc_dai_link_component exists before accessing its members.
In case of early probe deferral, some of the '.cpus' or '.codecs' may not
have been allocated yet. Check this before calling of_node_put() on the
structure member.
Fixes: c84836d7f6
("ASoC: meson: axg-card: use modern dai_link style")
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -115,9 +115,11 @@ static void axg_card_clean_references(struct axg_card *priv)
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if (card->dai_link) {
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for_each_card_prelinks(card, i, link) {
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of_node_put(link->cpus->of_node);
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if (link->cpus)
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of_node_put(link->cpus->of_node);
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for_each_link_codecs(link, j, codec)
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of_node_put(codec->of_node);
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if (codec)
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of_node_put(codec->of_node);
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}
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}
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