[PATCH] ASoC: sma1307: fix uninitialized variable refence

[Arnd Bergmann <arnd@kernel.org>]

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;

Initialize this to NULL as that is what it gets checked for in
case of error.

Fixes: 576c57e6b4c1 ("ASoC: sma1307: Add driver for Iron Device SMA1307")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 sound/soc/codecs/sma1307.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/sma1307.c b/sound/soc/codecs/sma1307.c
index 81638768ac12..9d6a70b9b626 100644
--- a/sound/soc/codecs/sma1307.c
+++ b/sound/soc/codecs/sma1307.c
@@ -1709,7 +1709,7 @@ static void sma1307_check_fault_worker(struct work_struct *work)
 
 static void sma1307_setting_loaded(struct sma1307_priv *sma1307, const char *file)
 {
-	const struct firmware *fw;
+	const struct firmware *fw = NULL;
 	int *data, size, offset, num_mode;
 
 	request_firmware(&fw, file, sma1307->dev);
-- 
2.39.5