linux-kernel - [PATCH] [v2] ASoC: sma1307: fix uninitialized variable refence

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Message-Id: <20241113175734.2443315-1-arnd@kernel.org>
Date: Wed, 13 Nov 2024 18:57:13 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Kiseok Jo <kiseok.jo@...ndevice.com>,
	Mark Brown <broonie@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Tang Bin <tangbin@...s.chinamobile.com>,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] [v2] ASoC: sma1307: fix uninitialized variable refence

From: Arnd Bergmann <arnd@...db.de>

When firmware loading is disabled, gcc warns that the local
'fw' variable fails to get initialized:

sound/soc/codecs/sma1307.c: In function 'sma1307_setting_loaded.isra':
sound/soc/codecs/sma1307.c:1717:12: error: 'fw' is used uninitialized [-Werror=uninitialized]
 1717 |         if (!fw) {
      |            ^
sound/soc/codecs/sma1307.c:1712:32: note: 'fw' was declared here
 1712 |         const struct firmware *fw;

Check the return code from request_firmware() to ensure that the
firmware is correctly set, and drop the incorrect release_firmware()
on that uninitialized data.

Fixes: 576c57e6b4c1 ("ASoC: sma1307: Add driver for Iron Device SMA1307")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
[v2] check error value correctly
---
 sound/soc/codecs/sma1307.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/sound/soc/codecs/sma1307.c b/sound/soc/codecs/sma1307.c
index 81638768ac12..f2cea6186d98 100644
--- a/sound/soc/codecs/sma1307.c
+++ b/sound/soc/codecs/sma1307.c
@@ -1711,13 +1711,13 @@ static void sma1307_setting_loaded(struct sma1307_priv *sma1307, const char *fil
 {
 	const struct firmware *fw;
 	int *data, size, offset, num_mode;
+	int ret;
 
-	request_firmware(&fw, file, sma1307->dev);
+	ret = request_firmware(&fw, file, sma1307->dev);
 
-	if (!fw) {
-		dev_err(sma1307->dev, "%s: failed to read \"%s\"\n",
-			__func__, setting_file);
-		release_firmware(fw);
+	if (ret) {
+		dev_err(sma1307->dev, "%s: failed to read \"%s\": %pe\n",
+			__func__, setting_file, ERR_PTR(ret));
 		sma1307->set.status = false;
 		return;
 	} else if ((fw->size) < SMA1307_SETTING_HEADER_SIZE) {
-- 
2.39.5