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>
diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c
index 1dd9dbe..7e46258 100644
--- a/sound/pci/hda/hda_proc.c
+++ b/sound/pci/hda/hda_proc.c
@@ -451,7 +451,7 @@
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)));