linux-kernel - [PATCH] ASoC: ad1980: Return proper error if vendor id mismatch

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Date:	Tue, 06 Sep 2011 10:37:48 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Roy Huang <roy.huang@...log.com>, Cliff Cai <cliff.cai@...log.com>,
	Liam Girdwood <lrg@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	alsa-devel@...a-project.org
Subject: [PATCH] ASoC: ad1980: Return proper error if vendor id mismatch

Return -ENODEV instead of 0 if vendor id mismatch.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 sound/soc/codecs/ad1980.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/ad1980.c b/sound/soc/codecs/ad1980.c
index 923b364..4c0fc30 100644
--- a/sound/soc/codecs/ad1980.c
+++ b/sound/soc/codecs/ad1980.c
@@ -200,18 +200,22 @@ static int ad1980_soc_probe(struct snd_soc_codec *codec)
 	}
 
 	/* Read out vendor ID to make sure it is ad1980 */
-	if (ac97_read(codec, AC97_VENDOR_ID1) != 0x4144)
+	if (ac97_read(codec, AC97_VENDOR_ID1) != 0x4144) {
+		ret = -ENODEV;
 		goto reset_err;
+	}
 
 	vendor_id2 = ac97_read(codec, AC97_VENDOR_ID2);
 
 	if (vendor_id2 != 0x5370) {
-		if (vendor_id2 != 0x5374)
+		if (vendor_id2 != 0x5374) {
+			ret = -ENODEV;
 			goto reset_err;
-		else
+		} else {
 			printk(KERN_WARNING "ad1980: "
 				"Found AD1981 - only 2/2 IN/OUT Channels "
 				"supported\n");
+		}
 	}
 
 	/* unmute captures and playbacks volume */
-- 
1.7.4.1



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