ALSA: info: Move card id proc creation into info.c

The creation of card's id proc file can be moved gracefully into
info.c.  Also, the assignment of card->proc_id is superfluous and can
be dropped.  So let's do it.

Basically this is no functional change but code refactoring, but one
potential behavior change is that now it returns properly the error
code from snd_info_card_register(), which is a good thing (tm).

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/include/sound/core.h b/include/sound/core.h
index 36a5934cf4b10fc5083cc08f420a091bb9c24075..e923c23e05dd779bd7b40b35f4b51bc0b569b6d1 100644 (file)
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -120,7 +120,6 @@ struct snd_card {
        struct list_head ctl_files;     /* active control files */
 
        struct snd_info_entry *proc_root;       /* root for soundcard specific files */
-       struct snd_info_entry *proc_id; /* the card id */
        struct proc_dir_entry *proc_root_link;  /* number link to real id */
 
        struct list_head files_list;    /* all files associated to this card */

diff --git a/sound/core/info.c b/sound/core/info.c
index 7a4e733172eed06bd5f707fe34cfd54e87d36fa6..96a074019c33c28b5587d7d833110eced98669c0 100644 (file)
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -504,6 +504,14 @@ int __exit snd_info_done(void)
        return 0;
 }
 
+static void snd_card_id_read(struct snd_info_entry *entry,
+                            struct snd_info_buffer *buffer)
+{
+       struct snd_card *card = entry->private_data;
+
+       snd_iprintf(buffer, "%s\n", card->id);
+}
+
 /*
  * create a card proc file
  * called from init.c
@@ -521,7 +529,8 @@ int snd_info_card_create(struct snd_card *card)
        if (!entry)
                return -ENOMEM;
        card->proc_root = entry;
-       return 0;
+
+       return snd_card_ro_proc_new(card, "id", card, snd_card_id_read);
 }
 
 /*

diff --git a/sound/core/init.c b/sound/core/init.c
index 5252a9ce13dc776d0701e1c7efb879afac1b8689..0c4dc40376a709ff2e8aabd2f9ac4d25660389be 100644 (file)
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -100,33 +100,6 @@ int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int free_flag);
 EXPORT_SYMBOL(snd_mixer_oss_notify_callback);
 #endif
 
-#ifdef CONFIG_SND_PROC_FS
-static void snd_card_id_read(struct snd_info_entry *entry,
-                            struct snd_info_buffer *buffer)
-{
-       struct snd_card *card = entry->private_data;
-
-       snd_iprintf(buffer, "%s\n", card->id);
-}
-
-static int init_info_for_card(struct snd_card *card)
-{
-       struct snd_info_entry *entry;
-
-       entry = snd_info_create_card_entry(card, "id", card->proc_root);
-       if (!entry) {
-               dev_dbg(card->dev, "unable to create card entry\n");
-               return -ENOMEM;
-       }
-       snd_info_set_text_ops(entry, card, snd_card_id_read);
-       card->proc_id = entry;
-
-       return snd_info_card_register(card);
-}
-#else /* !CONFIG_SND_PROC_FS */
-#define init_info_for_card(card)
-#endif
-
 static int check_empty_slot(struct module *module, int slot)
 {
        return !slots[slot] || !*slots[slot];
@@ -493,7 +466,6 @@ static int snd_card_do_free(struct snd_card *card)
        snd_device_free_all(card);
        if (card->private_free)
                card->private_free(card);
-       snd_info_free_entry(card->proc_id);
        if (snd_info_card_free(card) < 0) {
                dev_warn(card->dev, "unable to free card info\n");
                /* Not fatal error */
@@ -797,7 +769,10 @@ int snd_card_register(struct snd_card *card)
        }
        snd_cards[card->number] = card;
        mutex_unlock(&snd_card_mutex);
-       init_info_for_card(card);
+       err = snd_info_card_register(card);
+       if (err < 0)
+               return err;
+
 #if IS_ENABLED(CONFIG_SND_MIXER_OSS)
        if (snd_mixer_oss_notify_callback)
                snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_REGISTER);