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ASoC: core: Fix possible NULL pointer dereference

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When SSR is triggered when the system does not have a sound card
registered, but has codecs. The pointer card sent from codec driver
to snd_soc_card_change_online_state is NULL. Add null check for soc_card
before dereferencing.

Change-Id: I23342a6cbd9d53e62b2ea11dfe79aad3759df6f0
Signed-off-by: Meng Wang <mwang@codeaurora.org>
This commit is contained in:
Meng Wang 2017-08-07 12:05:24 +08:00 • committed by Gerrit - the friendly Code Review server
parent cb1c821645
commit 214496cb3d
1 changed files with 2 additions and 1 deletions
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3
sound/soc/soc-core.c
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@ -3063,7 +3063,8 @@ static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
*/
void snd_soc_card_change_online_state(struct snd_soc_card *soc_card, int online)
{
snd_card_change_online_state(soc_card->snd_card, online);
if (soc_card && soc_card->snd_card)
snd_card_change_online_state(soc_card->snd_card, online);
}
EXPORT_SYMBOL(snd_soc_card_change_online_state);