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MLK-11933 mfd: mxc-hdmi-core: null check substream before using it

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null check substream before using it. Reported by coverity.

Signed-off-by: Zidan Wang <zidan.wang@freescale.com>
(cherry picked from commit fad2b9c1285a34eab0dec9f90edc06ec94e70a61)
This commit is contained in:
Zidan Wang 2015-12-01 16:14:26 +08:00 committed by Jason Liu
parent 6794747bde
commit 131e7697fb
1 changed files with 4 additions and 1 deletions
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5
drivers/mfd/mxc-hdmi-core.c
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@ -153,9 +153,12 @@ int mxc_hdmi_register_audio(struct snd_pcm_substream *substream)
unsigned long flags, flags1;
int ret = 0;
if (!substream)
return -EINVAL;
snd_pcm_stream_lock_irqsave(substream, flags);
if (substream && check_hdmi_state()) {
if (check_hdmi_state()) {
spin_lock_irqsave(&hdmi_audio_lock, flags1);
if (hdmi_audio_stream_playback) {
pr_err("%s unconsist hdmi auido stream!\n", __func__);