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ASoC: wcd934x: add null check for soundwire control data

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Soundwire control data is NULL if there is no soundwire slave
device enumerated.
Add null check to avoid panic.

Change-Id: Ief60d69c36c2a9831825f38da2c9a3f6dd5f13dc
CRs-Fixed: 2020293
Signed-off-by: Meng Wang <mwang@codeaurora.org>
This commit is contained in:
Meng Wang 2017-03-21 11:16:24 +08:00 • committed by Gerrit - the friendly Code Review server
parent 26db194916
commit e06bfb9b82
1 changed files with 3 additions and 2 deletions
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5
sound/soc/codecs/wcd934x/wcd934x.c
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@ -9076,8 +9076,9 @@ static int tavil_device_down(struct wcd9xxx *wcd9xxx)
codec = (struct snd_soc_codec *)(wcd9xxx->ssr_priv);
priv = snd_soc_codec_get_drvdata(codec);
swrm_wcd_notify(priv->swr.ctrl_data[0].swr_pdev,
SWR_DEVICE_DOWN, NULL);
if (priv->swr.ctrl_data)
swrm_wcd_notify(priv->swr.ctrl_data[0].swr_pdev,
SWR_DEVICE_DOWN, NULL);
tavil_dsd_reset(priv->dsd_config);
snd_soc_card_change_online_state(codec->component.card, 0);
for (count = 0; count < NUM_CODEC_DAIS; count++)