Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 148 insertions, 15 deletions

diff --git a/sound/core/control.c b/sound/core/control.c
index 45a818002d99..f8c5be464510 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -279,33 +279,31 @@ void snd_ctl_free_one(struct snd_kcontrol *kcontrol)
 
 EXPORT_SYMBOL(snd_ctl_free_one);
 
-static unsigned int snd_ctl_hole_check(struct snd_card *card,
-                                       unsigned int count)
+static bool snd_ctl_remove_numid_conflict(struct snd_card *card,
+                                          unsigned int count)
 {
         struct snd_kcontrol *kctl;
 
         list_for_each_entry(kctl, &card->controls, list) {
-                if ((kctl->id.numid <= card->last_numid &&
-                     kctl->id.numid + kctl->count > card->last_numid) ||
-                    (kctl->id.numid <= card->last_numid + count - 1 &&
-                     kctl->id.numid + kctl->count > card->last_numid + count - 1))
-                        return card->last_numid = kctl->id.numid + kctl->count - 1;
+                if (kctl->id.numid < card->last_numid + 1 + count &&
+                    kctl->id.numid + kctl->count > card->last_numid + 1) {
+                        card->last_numid = kctl->id.numid + kctl->count - 1;
+                        return true;
+                }
         }
-        return card->last_numid;
+        return false;
 }
 
 static int snd_ctl_find_hole(struct snd_card *card, unsigned int count)
 {
-        unsigned int last_numid, iter = 100000;
+        unsigned int iter = 100000;
 
-        last_numid = card->last_numid;
-        while (last_numid != snd_ctl_hole_check(card, count)) {
+        while (snd_ctl_remove_numid_conflict(card, count)) {
                 if (--iter == 0) {
                         /* this situation is very unlikely */
                         snd_printk(KERN_ERR "unable to allocate new control numid\n");
                         return -ENOMEM;
                 }
-                last_numid = card->last_numid;
         }
         return 0;
 }
@@ -368,6 +366,70 @@ int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
 EXPORT_SYMBOL(snd_ctl_add);
 
 /**
+ * snd_ctl_replace - replace the control instance of the card
+ * @card: the card instance
+ * @kcontrol: the control instance to replace
+ * @add_on_replace: add the control if not already added
+ *
+ * Replaces the given control.  If the given control does not exist
+ * and the add_on_replace flag is set, the control is added.  If the
+ * control exists, it is destroyed first.
+ *
+ * Returns zero if successful, or a negative error code on failure.
+ *
+ * It frees automatically the control which cannot be added or replaced.
+ */
+int snd_ctl_replace(struct snd_card *card, struct snd_kcontrol *kcontrol,
+                    bool add_on_replace)
+{
+        struct snd_ctl_elem_id id;
+        unsigned int idx;
+        struct snd_kcontrol *old;
+        int ret;
+
+        if (!kcontrol)
+                return -EINVAL;
+        if (snd_BUG_ON(!card || !kcontrol->info)) {
+                ret = -EINVAL;
+                goto error;
+        }
+        id = kcontrol->id;
+        down_write(&card->controls_rwsem);
+        old = snd_ctl_find_id(card, &id);
+        if (!old) {
+                if (add_on_replace)
+                        goto add;
+                up_write(&card->controls_rwsem);
+                ret = -EINVAL;
+                goto error;
+        }
+        ret = snd_ctl_remove(card, old);
+        if (ret < 0) {
+                up_write(&card->controls_rwsem);
+                goto error;
+        }
+add:
+        if (snd_ctl_find_hole(card, kcontrol->count) < 0) {
+                up_write(&card->controls_rwsem);
+                ret = -ENOMEM;
+                goto error;
+        }
+        list_add_tail(&kcontrol->list, &card->controls);
+        card->controls_count += kcontrol->count;
+        kcontrol->id.numid = card->last_numid + 1;
+        card->last_numid += kcontrol->count;
+        up_write(&card->controls_rwsem);
+        for (idx = 0; idx < kcontrol->count; idx++, id.index++, id.numid++)
+                snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_ADD, &id);
+        return 0;
+
+error:
+        snd_ctl_free_one(kcontrol);
+        return ret;
+}
+EXPORT_SYMBOL(snd_ctl_replace);
+
+/**
  * snd_ctl_remove - remove the control from the card and release it
  * @card: the card instance
  * @kcontrol: the control instance to remove
@@ -466,6 +528,52 @@ error:
 }
 
 /**
+ * snd_ctl_activate_id - activate/inactivate the control of the given id
+ * @card: the card instance
+ * @id: the control id to activate/inactivate
+ * @active: non-zero to activate
+ *
+ * Finds the control instance with the given id, and activate or
+ * inactivate the control together with notification, if changed.
+ *
+ * Returns 0 if unchanged, 1 if changed, or a negative error code on failure.
+ */
+int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id,
+                        int active)
+{
+        struct snd_kcontrol *kctl;
+        struct snd_kcontrol_volatile *vd;
+        unsigned int index_offset;
+        int ret;
+
+        down_write(&card->controls_rwsem);
+        kctl = snd_ctl_find_id(card, id);
+        if (kctl == NULL) {
+                ret = -ENOENT;
+                goto unlock;
+        }
+        index_offset = snd_ctl_get_ioff(kctl, &kctl->id);
+        vd = &kctl->vd[index_offset];
+        ret = 0;
+        if (active) {
+                if (!(vd->access & SNDRV_CTL_ELEM_ACCESS_INACTIVE))
+                        goto unlock;
+                vd->access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+        } else {
+                if (vd->access & SNDRV_CTL_ELEM_ACCESS_INACTIVE)
+                        goto unlock;
+                vd->access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+        }
+        ret = 1;
+ unlock:
+        up_write(&card->controls_rwsem);
+        if (ret > 0)
+                snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_INFO, id);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(snd_ctl_activate_id);
+
+/**
  * snd_ctl_rename_id - replace the id of a control on the card
  * @card: the card instance
  * @src_id: the old id
@@ -596,13 +704,12 @@ static int snd_ctl_elem_list(struct snd_card *card,
         struct snd_ctl_elem_list list;
         struct snd_kcontrol *kctl;
         struct snd_ctl_elem_id *dst, *id;
-        unsigned int offset, space, first, jidx;
+        unsigned int offset, space, jidx;
         
         if (copy_from_user(&list, _list, sizeof(list)))
                 return -EFAULT;
         offset = list.offset;
         space = list.space;
-        first = 0;
         /* try limit maximum space */
         if (space > 16384)
                 return -ENOMEM;
@@ -1488,7 +1595,7 @@ int snd_ctl_create(struct snd_card *card)
 }
 
 /*
- * Frequently used control callbacks
+ * Frequently used control callbacks/helpers
  */
 int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_info *uinfo)
@@ -1513,3 +1620,29 @@ int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
 }
 
 EXPORT_SYMBOL(snd_ctl_boolean_stereo_info);
+
+/**
+ * snd_ctl_enum_info - fills the info structure for an enumerated control
+ * @info: the structure to be filled
+ * @channels: the number of the control's channels; often one
+ * @items: the number of control values; also the size of @names
+ * @names: an array containing the names of all control values
+ *
+ * Sets all required fields in @info to their appropriate values.
+ * If the control's accessibility is not the default (readable and writable),
+ * the caller has to fill @info->access.
+ */
+int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels,
+                      unsigned int items, const char *const names[])
+{
+        info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+        info->count = channels;
+        info->value.enumerated.items = items;
+        if (info->value.enumerated.item >= items)
+                info->value.enumerated.item = items - 1;
+        strlcpy(info->value.enumerated.name,
+                names[info->value.enumerated.item],
+                sizeof(info->value.enumerated.name));
+        return 0;
+}
+EXPORT_SYMBOL(snd_ctl_enum_info);