linux-kernel - [PATCH] ASoC: soc-core: fix an uninitialized use

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Message-Id: <20200206200345.175344-1-caij2003@gmail.com>
Date:   Thu,  6 Feb 2020 12:03:45 -0800
From:   Jian Cai <caij2003@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     caij2003@...il.com, Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: soc-core: fix an uninitialized use

Fixed the uninitialized use of a signed integer variable ret in
soc_probe_component when all its definitions are not executed. This
caused  -ftrivial-auto-var-init=pattern to initialize the variable to
repeated 0xAA (i.e. a negative value) and triggered the following code
unintentionally.

err_probe:
	if (ret < 0)
		soc_cleanup_component(component);

Signed-off-by: Jian Cai <caij2003@...il.com>
---
 sound/soc/soc-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 068d809c349a..bfb813ba34f3 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1180,7 +1180,7 @@ static int soc_probe_component(struct snd_soc_card *card,
 		snd_soc_component_get_dapm(component);
 	struct snd_soc_dai *dai;
 	int probed = 0;
-	int ret;
+	int ret = 0;
 
 	if (!strcmp(component->name, "snd-soc-dummy"))
 		return 0;
-- 
2.25.0.341.g760bfbb309-goog