sound: Fix warnings relating to ignored return value in snd_card_register

Do not ignore the return of 'device_create_file' in
'snd_card_register' and thereby fixing the following warnings:

sound/core/init.c: In function 'snd_card_register':
sound/core/init.c:640: warning: ignoring return value of
'device_create_file', declared with attribute warn_unused_result
sound/core/init.c:641: warning: ignoring return value of
'device_create_file', declared with attribute warn_unused_result

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 6 insertions, 2 deletions

diff --git a/sound/core/init.c b/sound/core/init.c
index af1e407ca27f..0d5520c415d3 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -637,8 +637,12 @@ int snd_card_register(struct snd_card *card)
 #endif
 #ifndef CONFIG_SYSFS_DEPRECATED
         if (card->card_dev) {
-                device_create_file(card->card_dev, &card_id_attrs);
-                device_create_file(card->card_dev, &card_number_attrs);
+                err = device_create_file(card->card_dev, &card_id_attrs);
+                if (err < 0)
+                        return err;
+                err = device_create_file(card->card_dev, &card_number_attrs);
+                if (err < 0)
+                        return err;
         }
 #endif
         return 0;