diff --git a/include/sound/core.h b/include/sound/core.h
index bc05668..9869087 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -185,6 +185,7 @@ static inline int snd_power_wait(struct snd_card *card, unsigned int state) { re
 struct snd_minor {
 	int type;			/* SNDRV_DEVICE_TYPE_XXX */
 	int card;			/* card number */
+	struct snd_card *cardp;
 	int device;			/* device number */
 	const struct file_operations *f_ops;	/* file operations */
 	void *private_data;		/* private data for f_ops->open */
@@ -241,6 +242,7 @@ static inline int snd_register_device(int type, struct snd_card *card, int dev,
 
 int snd_unregister_device(int type, struct snd_card *card, int dev);
 void *snd_lookup_minor_data(unsigned int minor, int type);
+void *snd_lookup_minor_data2(unsigned int minor, int type, struct file *file);
 int snd_add_device_sysfs_file(int type, struct snd_card *card, int dev,
 			      struct device_attribute *attr);
 
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 8753c89..c2445c0 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -2114,8 +2114,8 @@ static int snd_pcm_playback_open(struct inode *inode, struct file *file)
 	int err = nonseekable_open(inode, file);
 	if (err < 0)
 		return err;
-	pcm = snd_lookup_minor_data(iminor(inode),
-				    SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
+	pcm = snd_lookup_minor_data2(iminor(inode),
+				    SNDRV_DEVICE_TYPE_PCM_PLAYBACK, file);
 	return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
 }
 
@@ -2125,23 +2125,24 @@ static int snd_pcm_capture_open(struct inode *inode, struct file *file)
 	int err = nonseekable_open(inode, file);
 	if (err < 0)
 		return err;
-	pcm = snd_lookup_minor_data(iminor(inode),
-				    SNDRV_DEVICE_TYPE_PCM_CAPTURE);
+	pcm = snd_lookup_minor_data2(iminor(inode),
+				    SNDRV_DEVICE_TYPE_PCM_CAPTURE, file);
 	return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
 }
 
+#include <linux/delay.h>
 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
 {
 	int err;
 	wait_queue_t wait;
 
+	printk("msleep o2 %p\n", pcm);
+	mdelay(5000);
+	printk("msleep o2+\n");
 	if (pcm == NULL) {
 		err = -ENODEV;
 		goto __error1;
 	}
-	err = snd_card_file_add(pcm->card, file);
-	if (err < 0)
-		goto __error1;
 	if (!try_module_get(pcm->card->module)) {
 		err = -EFAULT;
 		goto __error2;
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 6439760..5ea8010 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -118,6 +118,35 @@ void *snd_lookup_minor_data(unsigned int minor, int type)
 
 EXPORT_SYMBOL(snd_lookup_minor_data);
 
+#include <linux/delay.h>
+void *snd_lookup_minor_data2(unsigned int minor, int type, struct file *file)
+{
+	struct snd_minor *mreg;
+	void *private_data;
+
+	if (minor >= ARRAY_SIZE(snd_minors))
+		return NULL;
+	mutex_lock(&sound_mutex);
+	mreg = snd_minors[minor];
+	if (mreg && mreg->type == type)
+		private_data = mreg->private_data;
+	else
+		private_data = NULL;
+	printk("msleep o %p\n", NULL);
+	mdelay(5000);
+	printk("msleep o+\n");
+
+
+	if (private_data) {
+		if (snd_card_file_add(mreg->cardp, file) < 0)
+			private_data = NULL;
+	}
+	mutex_unlock(&sound_mutex);
+	return private_data;
+}
+
+EXPORT_SYMBOL(snd_lookup_minor_data2);
+
 #ifdef CONFIG_MODULES
 static struct snd_minor *autoload_device(unsigned int minor)
 {
@@ -272,6 +301,7 @@ int snd_register_device_for_dev(int type, struct snd_card *card, int dev,
 		return -ENOMEM;
 	preg->type = type;
 	preg->card = card ? card->number : -1;
+	preg->cardp = card;
 	preg->device = dev;
 	preg->f_ops = f_ops;
 	preg->private_data = private_data;