[PATCH] [v2] ASoC: sma1307: fix uninitialized variable refence

[PATCH] [v2] ASoC: sma1307: fix uninitialized variable refence

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.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@arndb.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

Re: [PATCH] [v2] ASoC: sma1307: fix uninitialized variable refence

[Mark Brown]

On Wed, 13 Nov 2024 18:57:13 +0100, Arnd Bergmann wrote:
> 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;
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: sma1307: fix uninitialized variable refence
      commit: c48a4497356f701f94f1951626637ae240af909e

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark