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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>
This commit is contained in:
Jerome Brunet 2019-06-10 14:53:44 +02:00 committed by Mark Brown
parent 6c0215f5d9
commit 960f428ca0
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1 changed files with 4 additions and 2 deletions
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6
sound/soc/meson/axg-card.c
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@ -115,9 +115,11 @@ static void axg_card_clean_references(struct axg_card *priv)
if (card->dai_link) {
for_each_card_prelinks(card, i, link) {
of_node_put(link->cpus->of_node);
if (link->cpus)
of_node_put(link->cpus->of_node);
for_each_link_codecs(link, j, codec)
of_node_put(codec->of_node);
if (codec)
of_node_put(codec->of_node);
}
}