From: Wang Xingchao <xingchao.wang@intel.com>
Date: Thu, 7 Jun 2012 08:52:07 +0000 (+0800)
Subject: ALSA: hda - check proper return value
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=e076eb5c952c0f724980b44a77902a2ff93d098c;p=~shefty%2Frdma-dev.git

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 1dd9dbeeef6..7e46258fc70 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)));