commit c461482c8072bb073e6146db320d3da85cdc89ad
author Takashi Iwai <tiwai@suse.de> Fri Jun 23 14:38:23 2006 +0200
committer Jaroslav Kysela <perex@suse.cz> Sat Sep 23 10:36:58 2006 +0200
tree 3b69cfd292a488a8cb57ac9b040bd2b1b1a1e26d
parent 746d4a02e68499fc6c1f8d0c43d2271853ade181

[ALSA] Unregister device files at disconnection

Orignally proposed by Sam Revitch <sam.revitch@gmail.com>.
Unregister device files at disconnection to avoid the futher accesses.
Also, the dev_unregister callback is removed and replaced with the
combination of disconnect + free.
A new function snd_card_free_when_closed() is introduced, which is
used in USB disconnect callback.

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

sound/core/hwdep.c

diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c
index cbd8a63..9aa9d94 100644
--- a/sound/core/hwdep.c
+++ b/sound/core/hwdep.c
@@ -42,7 +42,7 @@
 static int snd_hwdep_free(struct snd_hwdep *hwdep);
 static int snd_hwdep_dev_free(struct snd_device *device);
 static int snd_hwdep_dev_register(struct snd_device *device);
-static int snd_hwdep_dev_unregister(struct snd_device *device);
+static int snd_hwdep_dev_disconnect(struct snd_device *device);
 
 
 static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device)
@@ -353,7 +353,7 @@
 	static struct snd_device_ops ops = {
 		.dev_free = snd_hwdep_dev_free,
 		.dev_register = snd_hwdep_dev_register,
-		.dev_unregister = snd_hwdep_dev_unregister
+		.dev_disconnect = snd_hwdep_dev_disconnect,
 	};
 
 	snd_assert(rhwdep != NULL, return -EINVAL);
@@ -439,7 +439,7 @@
 	return 0;
 }
 
-static int snd_hwdep_dev_unregister(struct snd_device *device)
+static int snd_hwdep_dev_disconnect(struct snd_device *device)
 {
 	struct snd_hwdep *hwdep = device->device_data;
 
@@ -454,9 +454,9 @@
 		snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
 #endif
 	snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
-	list_del(&hwdep->list);
+	list_del_init(&hwdep->list);
 	mutex_unlock(&register_mutex);
-	return snd_hwdep_free(hwdep);
+	return 0;
 }
 
 #ifdef CONFIG_PROC_FS