Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (377 commits)
  ASoC: au1x: PSC-AC97 bugfixes
  ALSA: dummy - Increase MAX_PCM_SUBSTREAMS to 128
  ALSA: dummy - Add debug proc file
  ALSA: Add const prefix to proc helper functions
  ALSA: Re-export snd_pcm_format_name() function
  ALSA: hda - Use auto model for HP laptops with ALC268 codec
  ALSA: cs46xx - Fix minimum period size
  ASoC: Fix WM835x Out4 capture enumeration
  ALSA: Remove unneeded ifdef from sound/core.h
  ALSA: Remove struct snd_monitor_file from public sound/core.h
  ASoC: Remove unuused hw_read_t
  sound: oxygen: work around MCE when changing volume
  ALSA: dummy - Fake buffer allocations
  ALSA: hda/realtek: Added support for CLEVO M540R subsystem, 6 channel + digital
  ASoC: fix pxa2xx-ac97.c breakage
  ALSA: dummy - Fix the timer calculation in systimer mode
  ALSA: dummy - Add more description
  ALSA: dummy - Better jiffies handling
  ALSA: dummy - Support high-res timer mode
  ALSA: Release v1.0.21
  ...

1 files changed, 17 insertions, 17 deletions

diff --git a/sound/core/control.c b/sound/core/control.c
index 17b8d47a5cd..a8b7fabe645 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -414,7 +414,7 @@ int snd_ctl_remove_id(struct snd_card *card, struct snd_ctl_elem_id *id)
 EXPORT_SYMBOL(snd_ctl_remove_id);
 
 /**
- * snd_ctl_remove_unlocked_id - remove the unlocked control of the given id and release it
+ * snd_ctl_remove_user_ctl - remove and release the unlocked user control
  * @file: active control handle
  * @id: the control id to remove
  *
@@ -423,8 +423,8 @@ EXPORT_SYMBOL(snd_ctl_remove_id);
  * 
  * Returns 0 if successful, or a negative error code on failure.
  */
-static int snd_ctl_remove_unlocked_id(struct snd_ctl_file * file,
-				      struct snd_ctl_elem_id *id)
+static int snd_ctl_remove_user_ctl(struct snd_ctl_file * file,
+				   struct snd_ctl_elem_id *id)
 {
 	struct snd_card *card = file->card;
 	struct snd_kcontrol *kctl;
@@ -433,15 +433,23 @@ static int snd_ctl_remove_unlocked_id(struct snd_ctl_file * file,
 	down_write(&card->controls_rwsem);
 	kctl = snd_ctl_find_id(card, id);
 	if (kctl == NULL) {
-		up_write(&card->controls_rwsem);
-		return -ENOENT;
+		ret = -ENOENT;
+		goto error;
+	}
+	if (!(kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_USER)) {
+		ret = -EINVAL;
+		goto error;
 	}
 	for (idx = 0; idx < kctl->count; idx++)
 		if (kctl->vd[idx].owner != NULL && kctl->vd[idx].owner != file) {
-			up_write(&card->controls_rwsem);
-			return -EBUSY;
+			ret = -EBUSY;
+			goto error;
 		}
 	ret = snd_ctl_remove(card, kctl);
+	if (ret < 0)
+		goto error;
+	card->user_ctl_count--;
+error:
 	up_write(&card->controls_rwsem);
 	return ret;
 }
@@ -951,7 +959,7 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
 	
 	if (card->user_ctl_count >= MAX_USER_CONTROLS)
 		return -ENOMEM;
-	if (info->count > 1024)
+	if (info->count < 1)
 		return -EINVAL;
 	access = info->access == 0 ? SNDRV_CTL_ELEM_ACCESS_READWRITE :
 		(info->access & (SNDRV_CTL_ELEM_ACCESS_READWRITE|
@@ -1052,18 +1060,10 @@ static int snd_ctl_elem_remove(struct snd_ctl_file *file,
 			       struct snd_ctl_elem_id __user *_id)
 {
 	struct snd_ctl_elem_id id;
-	int err;
 
 	if (copy_from_user(&id, _id, sizeof(id)))
 		return -EFAULT;
-	err = snd_ctl_remove_unlocked_id(file, &id);
-	if (! err) {
-		struct snd_card *card = file->card;
-		down_write(&card->controls_rwsem);
-		card->user_ctl_count--;
-		up_write(&card->controls_rwsem);
-	}
-	return err;
+	return snd_ctl_remove_user_ctl(file, &id);
 }
 
 static int snd_ctl_subscribe_events(struct snd_ctl_file *file, int __user *ptr)