linux-kernel - [PATCH 3/3] ASoC: wm8804: Fix small issues in probe error paths

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu,  5 Mar 2015 15:39:22 +0000
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	broonie@...nel.org
Cc:	lgirdwood@...il.com, info@...zy-audio.com,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	patches@...nsource.wolfsonmicro.com
Subject: [PATCH 3/3] ASoC: wm8804: Fix small issues in probe error paths

This patch fixes some small issues on the probe error paths. Firstly,
fail probe if we can't register the regulator notifiers as this
will cause the cache to never be synchronised which will result in odd
behaviour if the regulators are controllable. Secondly, we don't need to
call regulator_bulk_disable if the enable fails, because the regulator
core will handle this clean up for us. Finally, we need to disable the
regulators if snd_soc_register_codecs fails.

Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
---
 sound/soc/codecs/wm8804.c |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/wm8804.c b/sound/soc/codecs/wm8804.c
index 7804ddf..f44da83 100644
--- a/sound/soc/codecs/wm8804.c
+++ b/sound/soc/codecs/wm8804.c
@@ -609,6 +609,7 @@ int wm8804_probe(struct device *dev, struct regmap *regmap)
 			dev_err(dev,
 				"Failed to register regulator notifier: %d\n",
 				ret);
+			return ret;
 		}
 	}
 
@@ -616,7 +617,7 @@ int wm8804_probe(struct device *dev, struct regmap *regmap)
 				    wm8804->supplies);
 	if (ret) {
 		dev_err(dev, "Failed to enable supplies: %d\n", ret);
-		goto err_reg_enable;
+		return ret;
 	}
 
 	ret = regmap_read(regmap, WM8804_RST_DEVID1, &id1);
@@ -653,8 +654,14 @@ int wm8804_probe(struct device *dev, struct regmap *regmap)
 		goto err_reg_enable;
 	}
 
-	return snd_soc_register_codec(dev, &soc_codec_dev_wm8804,
-				      &wm8804_dai, 1);
+	ret = snd_soc_register_codec(dev, &soc_codec_dev_wm8804,
+				     &wm8804_dai, 1);
+	if (ret < 0) {
+		dev_err(dev, "Failed to register CODEC: %d\n", ret);
+		goto err_reg_enable;
+	}
+
+	return 0;
 
 err_reg_enable:
 	regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
-- 
1.7.2.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/