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ALSA: hda - check proper return value 

snd_hda_param_read() return value -1 means error, others are responses

Signed-off-by: Wang Xingchao <xingchao.wang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Wang Xingchao 2012-06-07 16:52:07 +08:00 committed by Takashi Iwai
parent 0f4ccbb025
commit e076eb5c95
1 changed files with 1 additions and 1 deletions
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2
sound/pci/hda/hda_proc.c
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@ -451,7 +451,7 @@ static void print_power_state(struct snd_info_buffer *buffer,
int sup = snd_hda_param_read(codec, nid, AC_PAR_POWER_STATE);
int pwr = snd_hda_codec_read(codec, nid, 0,
AC_VERB_GET_POWER_STATE, 0);
if (sup)
if (sup != -1)
snd_iprintf(buffer, " Power states: %s\n",
bits_names(sup, names, ARRAY_SIZE(names)));