11 files changed, 691 insertions, 299 deletions

diff --git a/drivers/base/component.c b/drivers/base/component.c
index f748430bb654..89f5cf68d80a 100644
--- a/drivers/base/component.c
+++ b/drivers/base/component.c
@@ -18,18 +18,24 @@
 #include <linux/mutex.h>
 #include <linux/slab.h>
 
+struct component;
+
+struct component_match_array {
+	void *data;
+	int (*compare)(struct device *, void *);
+	void (*release)(struct device *, void *);
+	struct component *component;
+	bool duplicate;
+};
+
 struct component_match {
 	size_t alloc;
 	size_t num;
-	struct {
-		void *data;
-		int (*fn)(struct device *, void *);
-	} compare[0];
+	struct component_match_array *compare;
 };
 
 struct master {
 	struct list_head node;
-	struct list_head components;
 	bool bound;
 
 	const struct component_master_ops *ops;
@@ -39,7 +45,6 @@ struct master {
 
 struct component {
 	struct list_head node;
-	struct list_head master_node;
 	struct master *master;
 	bool bound;
 
@@ -63,48 +68,21 @@ static struct master *__master_find(struct device *dev,
 	return NULL;
 }
 
-/* Attach an unattached component to a master. */
-static void component_attach_master(struct master *master, struct component *c)
-{
-	c->master = master;
-
-	list_add_tail(&c->master_node, &master->components);
-}
-
-/* Detach a component from a master. */
-static void component_detach_master(struct master *master, struct component *c)
-{
-	list_del(&c->master_node);
-
-	c->master = NULL;
-}
-
-/*
- * Add a component to a master, finding the component via the compare
- * function and compare data.  This is safe to call for duplicate matches
- * and will not result in the same component being added multiple times.
- */
-int component_master_add_child(struct master *master,
+static struct component *find_component(struct master *master,
 	int (*compare)(struct device *, void *), void *compare_data)
 {
 	struct component *c;
-	int ret = -ENXIO;
 
 	list_for_each_entry(c, &component_list, node) {
 		if (c->master && c->master != master)
 			continue;
 
-		if (compare(c->dev, compare_data)) {
-			if (!c->master)
-				component_attach_master(master, c);
-			ret = 0;
-			break;
-		}
+		if (compare(c->dev, compare_data))
+			return c;
 	}
 
-	return ret;
+	return NULL;
 }
-EXPORT_SYMBOL_GPL(component_master_add_child);
 
 static int find_components(struct master *master)
 {
@@ -112,39 +90,44 @@ static int find_components(struct master *master)
 	size_t i;
 	int ret = 0;
 
-	if (!match) {
-		/*
-		 * Search the list of components, looking for components that
-		 * belong to this master, and attach them to the master.
-		 */
-		return master->ops->add_components(master->dev, master);
-	}
-
 	/*
 	 * Scan the array of match functions and attach
 	 * any components which are found to this master.
 	 */
 	for (i = 0; i < match->num; i++) {
-		ret = component_master_add_child(master,
-						 match->compare[i].fn,
-						 match->compare[i].data);
-		if (ret)
+		struct component_match_array *mc = &match->compare[i];
+		struct component *c;
+
+		dev_dbg(master->dev, "Looking for component %zu\n", i);
+
+		if (match->compare[i].component)
+			continue;
+
+		c = find_component(master, mc->compare, mc->data);
+		if (!c) {
+			ret = -ENXIO;
 			break;
+		}
+
+		dev_dbg(master->dev, "found component %s, duplicate %u\n", dev_name(c->dev), !!c->master);
+
+		/* Attach this component to the master */
+		match->compare[i].duplicate = !!c->master;
+		match->compare[i].component = c;
+		c->master = master;
 	}
 	return ret;
 }
 
-/* Detach all attached components from this master */
-static void master_remove_components(struct master *master)
+/* Detach component from associated master */
+static void remove_component(struct master *master, struct component *c)
 {
-	while (!list_empty(&master->components)) {
-		struct component *c = list_first_entry(&master->components,
-					struct component, master_node);
-
-		WARN_ON(c->master != master);
+	size_t i;
 
-		component_detach_master(master, c);
-	}
+	/* Detach the component from this master. */
+	for (i = 0; i < master->match->num; i++)
+		if (master->match->compare[i].component == c)
+			master->match->compare[i].component = NULL;
 }
 
 /*
@@ -159,44 +142,32 @@ static int try_to_bring_up_master(struct master *master,
 {
 	int ret;
 
-	if (master->bound)
-		return 0;
+	dev_dbg(master->dev, "trying to bring up master\n");
 
-	/*
-	 * Search the list of components, looking for components that
-	 * belong to this master, and attach them to the master.
-	 */
 	if (find_components(master)) {
-		/* Failed to find all components */
-		ret = 0;
-		goto out;
+		dev_dbg(master->dev, "master has incomplete components\n");
+		return 0;
 	}
 
 	if (component && component->master != master) {
-		ret = 0;
-		goto out;
+		dev_dbg(master->dev, "master is not for this component (%s)\n",
+			dev_name(component->dev));
+		return 0;
 	}
 
-	if (!devres_open_group(master->dev, NULL, GFP_KERNEL)) {
-		ret = -ENOMEM;
-		goto out;
-	}
+	if (!devres_open_group(master->dev, NULL, GFP_KERNEL))
+		return -ENOMEM;
 
 	/* Found all components */
 	ret = master->ops->bind(master->dev);
 	if (ret < 0) {
 		devres_release_group(master->dev, NULL);
 		dev_info(master->dev, "master bind failed: %d\n", ret);
-		goto out;
+		return ret;
 	}
 
 	master->bound = true;
 	return 1;
-
-out:
-	master_remove_components(master);
-
-	return ret;
 }
 
 static int try_to_bring_up_masters(struct component *component)
@@ -205,9 +176,11 @@ static int try_to_bring_up_masters(struct component *component)
 	int ret = 0;
 
 	list_for_each_entry(m, &masters, node) {
-		ret = try_to_bring_up_master(m, component);
-		if (ret != 0)
-			break;
+		if (!m->bound) {
+			ret = try_to_bring_up_master(m, component);
+			if (ret != 0)
+				break;
+		}
 	}
 
 	return ret;
@@ -220,45 +193,57 @@ static void take_down_master(struct master *master)
 		devres_release_group(master->dev, NULL);
 		master->bound = false;
 	}
+}
 
-	master_remove_components(master);
+static void component_match_release(struct device *master,
+	struct component_match *match)
+{
+	unsigned int i;
+
+	for (i = 0; i < match->num; i++) {
+		struct component_match_array *mc = &match->compare[i];
+
+		if (mc->release)
+			mc->release(master, mc->data);
+	}
 }
 
-static size_t component_match_size(size_t num)
+static void devm_component_match_release(struct device *dev, void *res)
 {
-	return offsetof(struct component_match, compare[num]);
+	component_match_release(dev, res);
 }
 
-static struct component_match *component_match_realloc(struct device *dev,
+static int component_match_realloc(struct device *dev,
 	struct component_match *match, size_t num)
 {
-	struct component_match *new;
+	struct component_match_array *new;
 
-	if (match && match->alloc == num)
-		return match;
+	if (match->alloc == num)
+		return 0;
 
-	new = devm_kmalloc(dev, component_match_size(num), GFP_KERNEL);
+	new = devm_kmalloc_array(dev, num, sizeof(*new), GFP_KERNEL);
 	if (!new)
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 
-	if (match) {
-		memcpy(new, match, component_match_size(min(match->num, num)));
-		devm_kfree(dev, match);
-	} else {
-		new->num = 0;
+	if (match->compare) {
+		memcpy(new, match->compare, sizeof(*new) *
+					    min(match->num, num));
+		devm_kfree(dev, match->compare);
 	}
+	match->compare = new;
+	match->alloc = num;
 
-	new->alloc = num;
-
-	return new;
+	return 0;
 }
 
 /*
- * Add a component to be matched.
+ * Add a component to be matched, with a release function.
  *
  * The match array is first created or extended if necessary.
  */
-void component_match_add(struct device *dev, struct component_match **matchptr,
+void component_match_add_release(struct device *master,
+	struct component_match **matchptr,
+	void (*release)(struct device *, void *),
 	int (*compare)(struct device *, void *), void *compare_data)
 {
 	struct component_match *match = *matchptr;
@@ -266,22 +251,37 @@ void component_match_add(struct device *dev, struct component_match **matchptr,
 	if (IS_ERR(match))
 		return;
 
-	if (!match || match->num == match->alloc) {
-		size_t new_size = match ? match->alloc + 16 : 15;
+	if (!match) {
+		match = devres_alloc(devm_component_match_release,
+				     sizeof(*match), GFP_KERNEL);
+		if (!match) {
+			*matchptr = ERR_PTR(-ENOMEM);
+			return;
+		}
 
-		match = component_match_realloc(dev, match, new_size);
+		devres_add(master, match);
 
 		*matchptr = match;
+	}
+
+	if (match->num == match->alloc) {
+		size_t new_size = match ? match->alloc + 16 : 15;
+		int ret;
 
-		if (IS_ERR(match))
+		ret = component_match_realloc(master, match, new_size);
+		if (ret) {
+			*matchptr = ERR_PTR(ret);
 			return;
+		}
 	}
 
-	match->compare[match->num].fn = compare;
+	match->compare[match->num].compare = compare;
+	match->compare[match->num].release = release;
 	match->compare[match->num].data = compare_data;
+	match->compare[match->num].component = NULL;
 	match->num++;
 }
-EXPORT_SYMBOL(component_match_add);
+EXPORT_SYMBOL(component_match_add_release);
 
 int component_master_add_with_match(struct device *dev,
 	const struct component_master_ops *ops,
@@ -290,15 +290,10 @@ int component_master_add_with_match(struct device *dev,
 	struct master *master;
 	int ret;
 
-	if (ops->add_components && match)
-		return -EINVAL;
-
-	if (match) {
-		/* Reallocate the match array for its true size */
-		match = component_match_realloc(dev, match, match->num);
-		if (IS_ERR(match))
-			return PTR_ERR(match);
-	}
+	/* Reallocate the match array for its true size */
+	ret = component_match_realloc(dev, match, match->num);
+	if (ret)
+		return ret;
 
 	master = kzalloc(sizeof(*master), GFP_KERNEL);
 	if (!master)
@@ -307,7 +302,6 @@ int component_master_add_with_match(struct device *dev,
 	master->dev = dev;
 	master->ops = ops;
 	master->match = match;
-	INIT_LIST_HEAD(&master->components);
 
 	/* Add to the list of available masters. */
 	mutex_lock(&component_mutex);
@@ -326,24 +320,28 @@ int component_master_add_with_match(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(component_master_add_with_match);
 
-int component_master_add(struct device *dev,
-	const struct component_master_ops *ops)
-{
-	return component_master_add_with_match(dev, ops, NULL);
-}
-EXPORT_SYMBOL_GPL(component_master_add);
-
 void component_master_del(struct device *dev,
 	const struct component_master_ops *ops)
 {
 	struct master *master;
+	int i;
 
 	mutex_lock(&component_mutex);
 	master = __master_find(dev, ops);
 	if (master) {
+		struct component_match *match = master->match;
+
 		take_down_master(master);
 
 		list_del(&master->node);
+
+		if (match) {
+			for (i = 0; i < match->num; i++) {
+				struct component *c = match->compare[i].component;
+				if (c)
+					c->master = NULL;
+			}
+		}
 		kfree(master);
 	}
 	mutex_unlock(&component_mutex);
@@ -366,6 +364,7 @@ void component_unbind_all(struct device *master_dev, void *data)
 {
 	struct master *master;
 	struct component *c;
+	size_t i;
 
 	WARN_ON(!mutex_is_locked(&component_mutex));
 
@@ -373,8 +372,12 @@ void component_unbind_all(struct device *master_dev, void *data)
 	if (!master)
 		return;
 
-	list_for_each_entry_reverse(c, &master->components, master_node)
-		component_unbind(c, master, data);
+	/* Unbind components in reverse order */
+	for (i = master->match->num; i--; )
+		if (!master->match->compare[i].duplicate) {
+			c = master->match->compare[i].component;
+			component_unbind(c, master, data);
+		}
 }
 EXPORT_SYMBOL_GPL(component_unbind_all);
 
@@ -434,6 +437,7 @@ int component_bind_all(struct device *master_dev, void *data)
 {
 	struct master *master;
 	struct component *c;
+	size_t i;
 	int ret = 0;
 
 	WARN_ON(!mutex_is_locked(&component_mutex));
@@ -442,16 +446,21 @@ int component_bind_all(struct device *master_dev, void *data)
 	if (!master)
 		return -EINVAL;
 
-	list_for_each_entry(c, &master->components, master_node) {
-		ret = component_bind(c, master, data);
-		if (ret)
-			break;
-	}
+	/* Bind components in match order */
+	for (i = 0; i < master->match->num; i++)
+		if (!master->match->compare[i].duplicate) {
+			c = master->match->compare[i].component;
+			ret = component_bind(c, master, data);
+			if (ret)
+				break;
+		}
 
 	if (ret != 0) {
-		list_for_each_entry_continue_reverse(c, &master->components,
-						     master_node)
-			component_unbind(c, master, data);
+		for (; i--; )
+			if (!master->match->compare[i].duplicate) {
+				c = master->match->compare[i].component;
+				component_unbind(c, master, data);
+			}
 	}
 
 	return ret;
@@ -499,8 +508,10 @@ void component_del(struct device *dev, const struct component_ops *ops)
 			break;
 		}
 
-	if (component && component->master)
+	if (component && component->master) {
 		take_down_master(component->master);
+		remove_component(component->master, component);
+	}
 
 	mutex_unlock(&component_mutex);
 
diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c
index 5df4575b5ba7..47c43386786b 100644
--- a/drivers/base/platform-msi.c
+++ b/drivers/base/platform-msi.c
@@ -24,13 +24,17 @@
 #include <linux/msi.h>
 #include <linux/slab.h>
 
-#define DEV_ID_SHIFT	24
+#define DEV_ID_SHIFT	21
+#define MAX_DEV_MSIS	(1 << (32 - DEV_ID_SHIFT))
 
 /*
  * Internal data structure containing a (made up, but unique) devid
  * and the callback to write the MSI message.
  */
 struct platform_msi_priv_data {
+	struct device		*dev;
+	void 			*host_data;
+	msi_alloc_info_t	arg;
 	irq_write_msi_msg_t	write_msg;
 	int			devid;
 };
@@ -110,39 +114,49 @@ static void platform_msi_update_chip_ops(struct msi_domain_info *info)
 		chip->irq_write_msi_msg = platform_msi_write_msg;
 }
 
-static void platform_msi_free_descs(struct device *dev)
+static void platform_msi_free_descs(struct device *dev, int base, int nvec)
 {
 	struct msi_desc *desc, *tmp;
 
 	list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) {
-		list_del(&desc->list);
-		free_msi_entry(desc);
+		if (desc->platform.msi_index >= base &&
+		    desc->platform.msi_index < (base + nvec)) {
+			list_del(&desc->list);
+			free_msi_entry(desc);
+		}
 	}
 }
 
-static int platform_msi_alloc_descs(struct device *dev, int nvec,
-				    struct platform_msi_priv_data *data)
+static int platform_msi_alloc_descs_with_irq(struct device *dev, int virq,
+					     int nvec,
+					     struct platform_msi_priv_data *data)
 
 {
-	int i;
+	struct msi_desc *desc;
+	int i, base = 0;
 
-	for (i = 0; i < nvec; i++) {
-		struct msi_desc *desc;
+	if (!list_empty(dev_to_msi_list(dev))) {
+		desc = list_last_entry(dev_to_msi_list(dev),
+				       struct msi_desc, list);
+		base = desc->platform.msi_index + 1;
+	}
 
+	for (i = 0; i < nvec; i++) {
 		desc = alloc_msi_entry(dev);
 		if (!desc)
 			break;
 
 		desc->platform.msi_priv_data = data;
-		desc->platform.msi_index = i;
+		desc->platform.msi_index = base + i;
 		desc->nvec_used = 1;
+		desc->irq = virq ? virq + i : 0;
 
 		list_add_tail(&desc->list, dev_to_msi_list(dev));
 	}
 
 	if (i != nvec) {
 		/* Clean up the mess */
-		platform_msi_free_descs(dev);
+		platform_msi_free_descs(dev, base, nvec);
 
 		return -ENOMEM;
 	}
@@ -150,6 +164,13 @@ static int platform_msi_alloc_descs(struct device *dev, int nvec,
 	return 0;
 }
 
+static int platform_msi_alloc_descs(struct device *dev, int nvec,
+				    struct platform_msi_priv_data *data)
+
+{
+	return platform_msi_alloc_descs_with_irq(dev, 0, nvec, data);
+}
+
 /**
  * platform_msi_create_irq_domain - Create a platform MSI interrupt domain
  * @fwnode:		Optional fwnode of the interrupt controller
@@ -180,56 +201,75 @@ struct irq_domain *platform_msi_create_irq_domain(struct fwnode_handle *fwnode,
 	return domain;
 }
 
-/**
- * platform_msi_domain_alloc_irqs - Allocate MSI interrupts for @dev
- * @dev:		The device for which to allocate interrupts
- * @nvec:		The number of interrupts to allocate
- * @write_msi_msg:	Callback to write an interrupt message for @dev
- *
- * Returns:
- * Zero for success, or an error code in case of failure
- */
-int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
-				   irq_write_msi_msg_t write_msi_msg)
+static struct platform_msi_priv_data *
+platform_msi_alloc_priv_data(struct device *dev, unsigned int nvec,
+			     irq_write_msi_msg_t write_msi_msg)
 {
-	struct platform_msi_priv_data *priv_data;
-	int err;
-
+	struct platform_msi_priv_data *datap;
 	/*
 	 * Limit the number of interrupts to 256 per device. Should we
 	 * need to bump this up, DEV_ID_SHIFT should be adjusted
 	 * accordingly (which would impact the max number of MSI
 	 * capable devices).
 	 */
-	if (!dev->msi_domain || !write_msi_msg || !nvec ||
-	    nvec > (1 << (32 - DEV_ID_SHIFT)))
-		return -EINVAL;
+	if (!dev->msi_domain || !write_msi_msg || !nvec || nvec > MAX_DEV_MSIS)
+		return ERR_PTR(-EINVAL);
 
 	if (dev->msi_domain->bus_token != DOMAIN_BUS_PLATFORM_MSI) {
 		dev_err(dev, "Incompatible msi_domain, giving up\n");
-		return -EINVAL;
+		return ERR_PTR(-EINVAL);
 	}
 
 	/* Already had a helping of MSI? Greed... */
 	if (!list_empty(dev_to_msi_list(dev)))
-		return -EBUSY;
+		return ERR_PTR(-EBUSY);
+
+	datap = kzalloc(sizeof(*datap), GFP_KERNEL);
+	if (!datap)
+		return ERR_PTR(-ENOMEM);
+
+	datap->devid = ida_simple_get(&platform_msi_devid_ida,
+				      0, 1 << DEV_ID_SHIFT, GFP_KERNEL);
+	if (datap->devid < 0) {
+		int err = datap->devid;
+		kfree(datap);
+		return ERR_PTR(err);
+	}
 
-	priv_data = kzalloc(sizeof(*priv_data), GFP_KERNEL);
-	if (!priv_data)
-		return -ENOMEM;
+	datap->write_msg = write_msi_msg;
+	datap->dev = dev;
 
-	priv_data->devid = ida_simple_get(&platform_msi_devid_ida,
-					  0, 1 << DEV_ID_SHIFT, GFP_KERNEL);
-	if (priv_data->devid < 0) {
-		err = priv_data->devid;
-		goto out_free_data;
-	}
+	return datap;
+}
+
+static void platform_msi_free_priv_data(struct platform_msi_priv_data *data)
+{
+	ida_simple_remove(&platform_msi_devid_ida, data->devid);
+	kfree(data);
+}
+
+/**
+ * platform_msi_domain_alloc_irqs - Allocate MSI interrupts for @dev
+ * @dev:		The device for which to allocate interrupts
+ * @nvec:		The number of interrupts to allocate
+ * @write_msi_msg:	Callback to write an interrupt message for @dev
+ *
+ * Returns:
+ * Zero for success, or an error code in case of failure
+ */
+int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
+				   irq_write_msi_msg_t write_msi_msg)
+{
+	struct platform_msi_priv_data *priv_data;
+	int err;
 
-	priv_data->write_msg = write_msi_msg;
+	priv_data = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg);
+	if (IS_ERR(priv_data))
+		return PTR_ERR(priv_data);
 
 	err = platform_msi_alloc_descs(dev, nvec, priv_data);
 	if (err)
-		goto out_free_id;
+		goto out_free_priv_data;
 
 	err = msi_domain_alloc_irqs(dev->msi_domain, dev, nvec);
 	if (err)
@@ -238,11 +278,9 @@ int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
 	return 0;
 
 out_free_desc:
-	platform_msi_free_descs(dev);
-out_free_id:
-	ida_simple_remove(&platform_msi_devid_ida, priv_data->devid);
-out_free_data:
-	kfree(priv_data);
+	platform_msi_free_descs(dev, 0, nvec);
+out_free_priv_data:
+	platform_msi_free_priv_data(priv_data);
 
 	return err;
 }
@@ -253,18 +291,126 @@ out_free_data:
  */
 void platform_msi_domain_free_irqs(struct device *dev)
 {
-	struct msi_desc *desc;
+	if (!list_empty(dev_to_msi_list(dev))) {
+		struct msi_desc *desc;
+
+		desc = first_msi_entry(dev);
+		platform_msi_free_priv_data(desc->platform.msi_priv_data);
+	}
+
+	msi_domain_free_irqs(dev->msi_domain, dev);
+	platform_msi_free_descs(dev, 0, MAX_DEV_MSIS);
+}
+
+/**
+ * platform_msi_get_host_data - Query the private data associated with
+ *                              a platform-msi domain
+ * @domain:	The platform-msi domain
+ *
+ * Returns the private data provided when calling
+ * platform_msi_create_device_domain.
+ */
+void *platform_msi_get_host_data(struct irq_domain *domain)
+{
+	struct platform_msi_priv_data *data = domain->host_data;
+	return data->host_data;
+}
+
+/**
+ * platform_msi_create_device_domain - Create a platform-msi domain
+ *
+ * @dev:		The device generating the MSIs
+ * @nvec:		The number of MSIs that need to be allocated
+ * @write_msi_msg:	Callback to write an interrupt message for @dev
+ * @ops:		The hierarchy domain operations to use
+ * @host_data:		Private data associated to this domain
+ *
+ * Returns an irqdomain for @nvec interrupts
+ */
+struct irq_domain *
+platform_msi_create_device_domain(struct device *dev,
+				  unsigned int nvec,
+				  irq_write_msi_msg_t write_msi_msg,
+				  const struct irq_domain_ops *ops,
+				  void *host_data)
+{
+	struct platform_msi_priv_data *data;
+	struct irq_domain *domain;
+	int err;
+
+	data = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg);
+	if (IS_ERR(data))
+		return NULL;
+
+	data->host_data = host_data;
+	domain = irq_domain_create_hierarchy(dev->msi_domain, 0, nvec,
+					     of_node_to_fwnode(dev->of_node),
+					     ops, data);
+	if (!domain)
+		goto free_priv;
 
-	desc = first_msi_entry(dev);
-	if (desc) {
-		struct platform_msi_priv_data *data;
+	err = msi_domain_prepare_irqs(domain->parent, dev, nvec, &data->arg);
+	if (err)
+		goto free_domain;
+
+	return domain;
 
-		data = desc->platform.msi_priv_data;
+free_domain:
+	irq_domain_remove(domain);
+free_priv:
+	platform_msi_free_priv_data(data);
+	return NULL;
+}
+
+/**
+ * platform_msi_domain_free - Free interrupts associated with a platform-msi
+ *                            domain
+ *
+ * @domain:	The platform-msi domain
+ * @virq:	The base irq from which to perform the free operation
+ * @nvec:	How many interrupts to free from @virq
+ */
+void platform_msi_domain_free(struct irq_domain *domain, unsigned int virq,
+			      unsigned int nvec)
+{
+	struct platform_msi_priv_data *data = domain->host_data;
+	struct msi_desc *desc;
+	for_each_msi_entry(desc, data->dev) {
+		if (WARN_ON(!desc->irq || desc->nvec_used != 1))
+			return;
+		if (!(desc->irq >= virq && desc->irq < (virq + nvec)))
+			continue;
 
-		ida_simple_remove(&platform_msi_devid_ida, data->devid);
-		kfree(data);
+		irq_domain_free_irqs_common(domain, desc->irq, 1);
 	}
+}
 
-	msi_domain_free_irqs(dev->msi_domain, dev);
-	platform_msi_free_descs(dev);
+/**
+ * platform_msi_domain_alloc - Allocate interrupts associated with
+ *			       a platform-msi domain
+ *
+ * @domain:	The platform-msi domain
+ * @virq:	The base irq from which to perform the allocate operation
+ * @nvec:	How many interrupts to free from @virq
+ *
+ * Return 0 on success, or an error code on failure. Must be called
+ * with irq_domain_mutex held (which can only be done as part of a
+ * top-level interrupt allocation).
+ */
+int platform_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
+			      unsigned int nr_irqs)
+{
+	struct platform_msi_priv_data *data = domain->host_data;
+	int err;
+
+	err = platform_msi_alloc_descs_with_irq(data->dev, virq, nr_irqs, data);
+	if (err)
+		return err;
+
+	err = msi_domain_populate_irqs(domain->parent, data->dev,
+				       virq, nr_irqs, &data->arg);
+	if (err)
+		platform_msi_domain_free(domain, virq, nr_irqs);
+
+	return err;
 }
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index d77ed0c946dd..8dcbb266643b 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -118,6 +118,26 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
 EXPORT_SYMBOL_GPL(platform_get_irq);
 
 /**
+ * platform_irq_count - Count the number of IRQs a platform device uses
+ * @dev: platform device
+ *
+ * Return: Number of IRQs a platform device uses or EPROBE_DEFER
+ */
+int platform_irq_count(struct platform_device *dev)
+{
+	int ret, nr = 0;
+
+	while ((ret = platform_get_irq(dev, nr)) >= 0)
+		nr++;
+
+	if (ret == -EPROBE_DEFER)
+		return ret;
+
+	return nr;
+}
+EXPORT_SYMBOL_GPL(platform_irq_count);
+
+/**
  * platform_get_resource_byname - get a resource for a device by name
  * @dev: platform device
  * @type: resource type
diff --git a/drivers/base/regmap/regcache-flat.c b/drivers/base/regmap/regcache-flat.c
index 0246f44ded74..686c9e0b930e 100644
--- a/drivers/base/regmap/regcache-flat.c
+++ b/drivers/base/regmap/regcache-flat.c
@@ -21,7 +21,7 @@ static int regcache_flat_init(struct regmap *map)
 	int i;
 	unsigned int *cache;
 
-	map->cache = kzalloc(sizeof(unsigned int) * (map->max_register + 1),
+	map->cache = kcalloc(map->max_register + 1, sizeof(unsigned int),
 			     GFP_KERNEL);
 	if (!map->cache)
 		return -ENOMEM;
diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c
index 736e0d378567..6f77d7319fc6 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -139,7 +139,7 @@ static int regcache_lzo_init(struct regmap *map)
 	ret = 0;
 
 	blkcount = regcache_lzo_block_count(map);
-	map->cache = kzalloc(blkcount * sizeof *lzo_blocks,
+	map->cache = kcalloc(blkcount, sizeof(*lzo_blocks),
 			     GFP_KERNEL);
 	if (!map->cache)
 		return -ENOMEM;
@@ -152,8 +152,8 @@ static int regcache_lzo_init(struct regmap *map)
 	 * that register.
 	 */
 	bmp_size = map->num_reg_defaults_raw;
-	sync_bmp = kmalloc(BITS_TO_LONGS(bmp_size) * sizeof(long),
-			   GFP_KERNEL);
+	sync_bmp = kmalloc_array(BITS_TO_LONGS(bmp_size), sizeof(long),
+				 GFP_KERNEL);
 	if (!sync_bmp) {
 		ret = -ENOMEM;
 		goto err;
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 56486d92c4e7..aa56af87d941 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -361,13 +361,14 @@ regcache_rbtree_node_alloc(struct regmap *map, unsigned int reg)
 		rbnode->base_reg = reg;
 	}
 
-	rbnode->block = kmalloc(rbnode->blklen * map->cache_word_size,
-				GFP_KERNEL);
+	rbnode->block = kmalloc_array(rbnode->blklen, map->cache_word_size,
+				      GFP_KERNEL);
 	if (!rbnode->block)
 		goto err_free;
 
-	rbnode->cache_present = kzalloc(BITS_TO_LONGS(rbnode->blklen) *
-		sizeof(*rbnode->cache_present), GFP_KERNEL);
+	rbnode->cache_present = kcalloc(BITS_TO_LONGS(rbnode->blklen),
+					sizeof(*rbnode->cache_present),
+					GFP_KERNEL);
 	if (!rbnode->cache_present)
 		goto err_free_block;
 
@@ -413,8 +414,8 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
 		max = reg + max_dist;
 
 		/* look for an adjacent register to the one we are about to add */
-		for (node = rb_first(&rbtree_ctx->root); node;
-		     node = rb_next(node)) {
+		node = rbtree_ctx->root.rb_node;
+		while (node) {
 			rbnode_tmp = rb_entry(node, struct regcache_rbtree_node,
 					      node);
 
@@ -425,6 +426,11 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
 				new_base_reg = min(reg, base_reg);
 				new_top_reg = max(reg, top_reg);
 			} else {
+				if (max < base_reg)
+					node = node->rb_left;
+				else
+					node = node->rb_right;
+
 				continue;
 			}
 
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 4c07802986b2..348be3a35410 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -100,15 +100,25 @@ int regcache_init(struct regmap *map, const struct regmap_config *config)
 	int i;
 	void *tmp_buf;
 
-	for (i = 0; i < config->num_reg_defaults; i++)
-		if (config->reg_defaults[i].reg % map->reg_stride)
-			return -EINVAL;
-
 	if (map->cache_type == REGCACHE_NONE) {
+		if (config->reg_defaults || config->num_reg_defaults_raw)
+			dev_warn(map->dev,
+				 "No cache used with register defaults set!\n");
+
 		map->cache_bypass = true;
 		return 0;
 	}
 
+	if (config->reg_defaults && !config->num_reg_defaults) {
+		dev_err(map->dev,
+			 "Register defaults are set without the number!\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < config->num_reg_defaults; i++)
+		if (config->reg_defaults[i].reg % map->reg_stride)
+			return -EINVAL;
+
 	for (i = 0; i < ARRAY_SIZE(cache_types); i++)
 		if (cache_types[i]->type == map->cache_type)
 			break;
@@ -138,8 +148,6 @@ int regcache_init(struct regmap *map, const struct regmap_config *config)
 	 * a copy of it.
 	 */
 	if (config->reg_defaults) {
-		if (!map->num_reg_defaults)
-			return -EINVAL;
 		tmp_buf = kmemdup(config->reg_defaults, map->num_reg_defaults *
 				  sizeof(struct reg_default), GFP_KERNEL);
 		if (!tmp_buf)
@@ -535,19 +543,30 @@ bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,
 	switch (map->cache_word_size) {
 	case 1: {
 		u8 *cache = base;
+
 		cache[idx] = val;
 		break;
 	}
 	case 2: {
 		u16 *cache = base;
+
 		cache[idx] = val;
 		break;
 	}
 	case 4: {
 		u32 *cache = base;
+
+		cache[idx] = val;
+		break;
+	}
+#ifdef CONFIG_64BIT
+	case 8: {
+		u64 *cache = base;
+
 		cache[idx] = val;
 		break;
 	}
+#endif
 	default:
 		BUG();
 	}
@@ -568,16 +587,26 @@ unsigned int regcache_get_val(struct regmap *map, const void *base,
 	switch (map->cache_word_size) {
 	case 1: {
 		const u8 *cache = base;
+
 		return cache[idx];
 	}
 	case 2: {
 		const u16 *cache = base;
+
 		return cache[idx];
 	}
 	case 4: {
 		const u32 *cache = base;
+
+		return cache[idx];
+	}
+#ifdef CONFIG_64BIT
+	case 8: {
+		const u64 *cache = base;
+
 		return cache[idx];
 	}
+#endif
 	default:
 		BUG();
 	}
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 3f0a7e262d69..1ee3d40861c7 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -397,72 +397,39 @@ static const struct file_operations regmap_reg_ranges_fops = {
 	.llseek = default_llseek,
 };
 
-static ssize_t regmap_access_read_file(struct file *file,
-