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authorTakashi Iwai <tiwai@suse.de>2007-01-26 12:40:31 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2007-01-29 14:32:53 -0800
commit7d2aae1e88660cf09be913e9754e45189dc33412 (patch)
treeaf56ebcced14fb8e40640d9555129aab2ffa0532 /sound/core/init.c
parent5263bf65d6342e12ab716db8e529501670979321 (diff)
downloadlinux-7d2aae1e88660cf09be913e9754e45189dc33412.tar.bz2
[PATCH] ALSA: Fix sysfs breakage
The recent change for a new sysfs tree with card* object breaks the /sys/class/sound tree if CONFIG_SYSFS_DEPRECATED is enabled. The device in each entry doesn't point the correct device object: /sys/class/sound ... |-- pcmC0D0c | |-- dev | |-- device -> ../../../class/sound/card0 | |-- pcm_class | |-- power | | `-- wakeup | |-- subsystem -> ../../../class/sound | `-- uevent Also, this change breaks some drivers (like sound/arm/*) referring card->dev directly to obtain the device object for memory handling. This patch reverts the semantics of card->dev to the former version, which points to a real device object. The card* object is stored in a new card->card_dev field, instead. The device parent is chosen either card->dev or card->card_dev according to CONFIG_SYSFS_DEPRECATED to keep the tree compatibility. Also, card* isn't created if CONFIG_SYSFS_DEPRECATED is enabled. The reason of card* object is a root of all beloing devices, and it makes little sense if each sound device points to the real device object directly. Signed-off-by: Takashi Iwai <tiwai@suse.de> Acked-by: Monty Montgomery <xiphmont@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'sound/core/init.c')
-rw-r--r--sound/core/init.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/sound/core/init.c b/sound/core/init.c
index 6152a7554dfd..a4cc6b155ae9 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -361,8 +361,10 @@ static int snd_card_do_free(struct snd_card *card)
snd_printk(KERN_WARNING "unable to free card info\n");
/* Not fatal error */
}
- if (card->dev)
- device_unregister(card->dev);
+#ifndef CONFIG_SYSFS_DEPRECATED
+ if (card->card_dev)
+ device_unregister(card->card_dev);
+#endif
kfree(card);
return 0;
}
@@ -497,12 +499,14 @@ int snd_card_register(struct snd_card *card)
int err;
snd_assert(card != NULL, return -EINVAL);
- if (!card->dev) {
- card->dev = device_create(sound_class, card->parent, 0,
- "card%i", card->number);
- if (IS_ERR(card->dev))
- card->dev = NULL;
+#ifndef CONFIG_SYSFS_DEPRECATED
+ if (!card->card_dev) {
+ card->card_dev = device_create(sound_class, card->dev, 0,
+ "card%i", card->number);
+ if (IS_ERR(card->card_dev))
+ card->card_dev = NULL;
}
+#endif
if ((err = snd_device_register_all(card)) < 0)
return err;
mutex_lock(&snd_card_mutex);