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ALSA - hda: hdmi check NULL pointer in hdmi_set_chmap 

Make sure per_pin is not NULL before using it.

Fixes: 9b3dc8aa3f ('ALSA: hda - Register chmap obj as priv data instead of codec')
Signed-off-by: Libin Yang <libin.yang@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Libin Yang 2016-04-18 09:16:28 +08:00 committed by Takashi Iwai
parent 50fd4987c4
commit ed0739b577
1 changed files with 2 additions and 0 deletions
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2
sound/pci/hda/patch_hdmi.c
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@ -1858,6 +1858,8 @@ static void hdmi_set_chmap(struct hdac_device *hdac, int pcm_idx,
struct hdmi_spec *spec = codec->spec;
struct hdmi_spec_per_pin *per_pin = pcm_idx_to_pin(spec, pcm_idx);
if (!per_pin)
return;
mutex_lock(&per_pin->lock);
per_pin->chmap_set = true;
memcpy(per_pin->chmap, chmap, ARRAY_SIZE(per_pin->chmap));