ALSA: Introduce snd_card_create()

Introduced snd_card_create() function as a replacement of snd_card_new().
The new function returns a negative error code so that the probe callback
can return the proper error code, while snd_card_new() can give only NULL
check.

The old snd_card_new() is still provided as an inline function but with
__deprecated attribute.  It'll be removed soon later.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 13 insertions, 1 deletions

diff --git a/include/sound/core.h b/include/sound/core.h
index f632484bc743..25420c3b5513 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -296,8 +296,20 @@ int snd_card_locked(int card);
 extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd);
 #endif
 
+int snd_card_create(int idx, const char *id,
+                    struct module *module, int extra_size,
+                    struct snd_card **card_ret);
+
+static inline __deprecated
 struct snd_card *snd_card_new(int idx, const char *id,
-                         struct module *module, int extra_size);
+                              struct module *module, int extra_size)
+{
+        struct snd_card *card;
+        if (snd_card_create(idx, id, module, extra_size, &card) < 0)
+                return NULL;
+        return card;
+}
+
 int snd_card_disconnect(struct snd_card *card);
 int snd_card_free(struct snd_card *card);
 int snd_card_free_when_closed(struct snd_card *card);