[alsa-devel] [PATCH] 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 --- sound/pci/hda/hda_proc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c index 79d0188..99316a7 100644 --- a/sound/pci/hda/hda_proc.c +++ b/sound/pci/hda/hda_proc.c @@ -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)));