13 files changed, 247 insertions, 291 deletions

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 4c289ab91357..73f6c2925281 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -591,37 +591,6 @@ void bus_remove_device(struct device *dev)
         bus_put(dev->bus);
 }
 
-static int driver_add_attrs(struct bus_type *bus, struct device_driver *drv)
-{
-        int error = 0;
-        int i;
-
-        if (bus->drv_attrs) {
-                for (i = 0; bus->drv_attrs[i].attr.name; i++) {
-                        error = driver_create_file(drv, &bus->drv_attrs[i]);
-                        if (error)
-                                goto err;
-                }
-        }
-done:
-        return error;
-err:
-        while (--i >= 0)
-                driver_remove_file(drv, &bus->drv_attrs[i]);
-        goto done;
-}
-
-static void driver_remove_attrs(struct bus_type *bus,
-                                struct device_driver *drv)
-{
-        int i;
-
-        if (bus->drv_attrs) {
-                for (i = 0; bus->drv_attrs[i].attr.name; i++)
-                        driver_remove_file(drv, &bus->drv_attrs[i]);
-        }
-}
-
 static int __must_check add_bind_files(struct device_driver *drv)
 {
         int ret;
@@ -720,16 +689,12 @@ int bus_add_driver(struct device_driver *drv)
                 printk(KERN_ERR "%s: uevent attr (%s) failed\n",
                         __func__, drv->name);
         }
-        error = driver_add_attrs(bus, drv);
+        error = driver_add_groups(drv, bus->drv_groups);
         if (error) {
                 /* How the hell do we get out of this pickle? Give up */
-                printk(KERN_ERR "%s: driver_add_attrs(%s) failed\n",
-                        __func__, drv->name);
-        }
-        error = driver_add_groups(drv, bus->drv_groups);
-        if (error)
                 printk(KERN_ERR "%s: driver_create_groups(%s) failed\n",
                         __func__, drv->name);
+        }
 
         if (!drv->suppress_bind_attrs) {
                 error = add_bind_files(drv);
@@ -766,7 +731,6 @@ void bus_remove_driver(struct device_driver *drv)
 
         if (!drv->suppress_bind_attrs)
                 remove_bind_files(drv);
-        driver_remove_attrs(drv->bus, drv);
         driver_remove_groups(drv, drv->bus->drv_groups);
         driver_remove_file(drv, &driver_attr_uevent);
         klist_remove(&drv->p->knode_bus);
@@ -846,42 +810,6 @@ struct bus_type *find_bus(char *name)
 }
 #endif  /*  0  */
 
-
-/**
- * bus_add_attrs - Add default attributes for this bus.
- * @bus: Bus that has just been registered.
- */
-
-static int bus_add_attrs(struct bus_type *bus)
-{
-        int error = 0;
-        int i;
-
-        if (bus->bus_attrs) {
-                for (i = 0; bus->bus_attrs[i].attr.name; i++) {
-                        error = bus_create_file(bus, &bus->bus_attrs[i]);
-                        if (error)
-                                goto err;
-                }
-        }
-done:
-        return error;
-err:
-        while (--i >= 0)
-                bus_remove_file(bus, &bus->bus_attrs[i]);
-        goto done;
-}
-
-static void bus_remove_attrs(struct bus_type *bus)
-{
-        int i;
-
-        if (bus->bus_attrs) {
-                for (i = 0; bus->bus_attrs[i].attr.name; i++)
-                        bus_remove_file(bus, &bus->bus_attrs[i]);
-        }
-}
-
 static int bus_add_groups(struct bus_type *bus,
                           const struct attribute_group **groups)
 {
@@ -983,9 +911,6 @@ int bus_register(struct bus_type *bus)
         if (retval)
                 goto bus_probe_files_fail;
 
-        retval = bus_add_attrs(bus);
-        if (retval)
-                goto bus_attrs_fail;
         retval = bus_add_groups(bus, bus->bus_groups);
         if (retval)
                 goto bus_groups_fail;
@@ -994,8 +919,6 @@ int bus_register(struct bus_type *bus)
         return 0;
 
 bus_groups_fail:
-        bus_remove_attrs(bus);
-bus_attrs_fail:
         remove_probe_files(bus);
 bus_probe_files_fail:
         kset_unregister(bus->p->drivers_kset);
@@ -1024,7 +947,6 @@ void bus_unregister(struct bus_type *bus)
         pr_debug("bus: '%s': unregistering\n", bus->name);
         if (bus->dev_root)
                 device_unregister(bus->dev_root);
-        bus_remove_attrs(bus);
         bus_remove_groups(bus, bus->bus_groups);
         remove_probe_files(bus);
         kset_unregister(bus->p->drivers_kset);
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 8b7818b80056..f96f70419a78 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -47,18 +47,6 @@ static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr,
         return ret;
 }
 
-static const void *class_attr_namespace(struct kobject *kobj,
-                                        const struct attribute *attr)
-{
-        struct class_attribute *class_attr = to_class_attr(attr);
-        struct subsys_private *cp = to_subsys_private(kobj);
-        const void *ns = NULL;
-
-        if (class_attr->namespace)
-                ns = class_attr->namespace(cp->class, class_attr);
-        return ns;
-}
-
 static void class_release(struct kobject *kobj)
 {
         struct subsys_private *cp = to_subsys_private(kobj);
@@ -86,7 +74,6 @@ static const struct kobj_ns_type_operations *class_child_ns_type(struct kobject
 static const struct sysfs_ops class_sysfs_ops = {
         .show      = class_attr_show,
         .store     = class_attr_store,
-        .namespace = class_attr_namespace,
 };
 
 static struct kobj_type class_ktype = {
@@ -99,21 +86,23 @@ static struct kobj_type class_ktype = {
 static struct kset *class_kset;
 
 
-int class_create_file(struct class *cls, const struct class_attribute *attr)
+int class_create_file_ns(struct class *cls, const struct class_attribute *attr,
+                         const void *ns)
 {
         int error;
         if (cls)
-                error = sysfs_create_file(&cls->p->subsys.kobj,
-                                          &attr->attr);
+                error = sysfs_create_file_ns(&cls->p->subsys.kobj,
+                                             &attr->attr, ns);
         else
                 error = -EINVAL;
         return error;
 }
 
-void class_remove_file(struct class *cls, const struct class_attribute *attr)
+void class_remove_file_ns(struct class *cls, const struct class_attribute *attr,
+                          const void *ns)
 {
         if (cls)
-                sysfs_remove_file(&cls->p->subsys.kobj, &attr->attr);
+                sysfs_remove_file_ns(&cls->p->subsys.kobj, &attr->attr, ns);
 }
 
 static struct class *class_get(struct class *cls)
@@ -600,8 +589,8 @@ int __init classes_init(void)
         return 0;
 }
 
-EXPORT_SYMBOL_GPL(class_create_file);
-EXPORT_SYMBOL_GPL(class_remove_file);
+EXPORT_SYMBOL_GPL(class_create_file_ns);
+EXPORT_SYMBOL_GPL(class_remove_file_ns);
 EXPORT_SYMBOL_GPL(class_unregister);
 EXPORT_SYMBOL_GPL(class_destroy);
 
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 34abf4d8a45f..67b180d855b2 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -455,64 +455,6 @@ static ssize_t online_store(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR_RW(online);
 
-static int device_add_attributes(struct device *dev,
-                                 struct device_attribute *attrs)
-{
-        int error = 0;
-        int i;
-
-        if (attrs) {
-                for (i = 0; attrs[i].attr.name; i++) {
-                        error = device_create_file(dev, &attrs[i]);
-                        if (error)
-                                break;
-                }
-                if (error)
-                        while (--i >= 0)
-                                device_remove_file(dev, &attrs[i]);
-        }
-        return error;
-}
-
-static void device_remove_attributes(struct device *dev,
-                                     struct device_attribute *attrs)
-{
-        int i;
-
-        if (attrs)
-                for (i = 0; attrs[i].attr.name; i++)
-                        device_remove_file(dev, &attrs[i]);
-}
-
-static int device_add_bin_attributes(struct device *dev,
-                                     struct bin_attribute *attrs)
-{
-        int error = 0;
-        int i;
-
-        if (attrs) {
-                for (i = 0; attrs[i].attr.name; i++) {
-                        error = device_create_bin_file(dev, &attrs[i]);
-                        if (error)
-                                break;
-                }
-                if (error)
-                        while (--i >= 0)
-                                device_remove_bin_file(dev, &attrs[i]);
-        }
-        return error;
-}
-
-static void device_remove_bin_attributes(struct device *dev,
-                                         struct bin_attribute *attrs)
-{
-        int i;
-
-        if (attrs)
-                for (i = 0; attrs[i].attr.name; i++)
-                        device_remove_bin_file(dev, &attrs[i]);
-}
-
 int device_add_groups(struct device *dev, const struct attribute_group **groups)
 {
         return sysfs_create_groups(&dev->kobj, groups);
@@ -534,18 +476,12 @@ static int device_add_attrs(struct device *dev)
                 error = device_add_groups(dev, class->dev_groups);
                 if (error)
                         return error;
-                error = device_add_attributes(dev, class->dev_attrs);
-                if (error)
-                        goto err_remove_class_groups;
-                error = device_add_bin_attributes(dev, class->dev_bin_attrs);
-                if (error)
-                        goto err_remove_class_attrs;
         }
 
         if (type) {
                 error = device_add_groups(dev, type->groups);
                 if (error)
-                        goto err_remove_class_bin_attrs;
+                        goto err_remove_class_groups;
         }
 
         error = device_add_groups(dev, dev->groups);
@@ -563,12 +499,6 @@ static int device_add_attrs(struct device *dev)
  err_remove_type_groups:
         if (type)
                 device_remove_groups(dev, type->groups);
- err_remove_class_bin_attrs:
-        if (class)
-                device_remove_bin_attributes(dev, class->dev_bin_attrs);
- err_remove_class_attrs:
-        if (class)
-                device_remove_attributes(dev, class->dev_attrs);
  err_remove_class_groups:
         if (class)
                 device_remove_groups(dev, class->dev_groups);
@@ -587,11 +517,8 @@ static void device_remove_attrs(struct device *dev)
         if (type)
                 device_remove_groups(dev, type->groups);
 
-        if (class) {
-                device_remove_attributes(dev, class->dev_attrs);
-                device_remove_bin_attributes(dev, class->dev_bin_attrs);
+        if (class)
                 device_remove_groups(dev, class->dev_groups);
-        }
 }
 
 static ssize_t dev_show(struct device *dev, struct device_attribute *attr,
@@ -1881,6 +1808,7 @@ EXPORT_SYMBOL_GPL(device_destroy);
  */
 int device_rename(struct device *dev, const char *new_name)
 {
+        struct kobject *kobj = &dev->kobj;
         char *old_device_name = NULL;
         int error;
 
@@ -1888,8 +1816,7 @@ int device_rename(struct device *dev, const char *new_name)
         if (!dev)
                 return -EINVAL;
 
-        pr_debug("device: '%s': %s: renaming to '%s'\n", dev_name(dev),
-                 __func__, new_name);
+        dev_dbg(dev, "renaming to %s\n", new_name);
 
         old_device_name = kstrdup(dev_name(dev), GFP_KERNEL);
         if (!old_device_name) {
@@ -1898,13 +1825,14 @@ int device_rename(struct device *dev, const char *new_name)
         }
 
         if (dev->class) {
-                error = sysfs_rename_link(&dev->class->p->subsys.kobj,
-                        &dev->kobj, old_device_name, new_name);
+                error = sysfs_rename_link_ns(&dev->class->p->subsys.kobj,
+                                             kobj, old_device_name,
+                                             new_name, kobject_namespace(kobj));
                 if (error)
                         goto out;
         }
 
-        error = kobject_rename(&dev->kobj, new_name);
+        error = kobject_rename(kobj, new_name);
         if (error)
                 goto out;
 
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 848ebbd25717..f48370dfc908 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -44,13 +44,11 @@ static int __ref cpu_subsys_online(struct device *dev)
         struct cpu *cpu = container_of(dev, struct cpu, dev);
         int cpuid = dev->id;
         int from_nid, to_nid;
-        int ret = -ENODEV;
-
-        cpu_hotplug_driver_lock();
+        int ret;
 
         from_nid = cpu_to_node(cpuid);
         if (from_nid == NUMA_NO_NODE)
-                goto out;
+                return -ENODEV;
 
         ret = cpu_up(cpuid);
         /*
@@ -61,19 +59,12 @@ static int __ref cpu_subsys_online(struct device *dev)
         if (from_nid != to_nid)
                 change_cpu_under_node(cpu, from_nid, to_nid);
 
- out:
-        cpu_hotplug_driver_unlock();
         return ret;
 }
 
 static int cpu_subsys_offline(struct device *dev)
 {
-        int ret;
-
-        cpu_hotplug_driver_lock();
-        ret = cpu_down(dev->id);
-        cpu_hotplug_driver_unlock();
-        return ret;
+        return cpu_down(dev->id);
 }
 
 void unregister_cpu(struct cpu *cpu)
@@ -93,7 +84,17 @@ static ssize_t cpu_probe_store(struct device *dev,
                                const char *buf,
                                size_t count)
 {
-        return arch_cpu_probe(buf, count);
+        ssize_t cnt;
+        int ret;
+
+        ret = lock_device_hotplug_sysfs();
+        if (ret)
+                return ret;
+
+        cnt = arch_cpu_probe(buf, count);
+
+        unlock_device_hotplug();
+        return cnt;
 }
 
 static ssize_t cpu_release_store(struct device *dev,
@@ -101,7 +102,17 @@ static ssize_t cpu_release_store(struct device *dev,
                                  const char *buf,
                                  size_t count)
 {
-        return arch_cpu_release(buf, count);
+        ssize_t cnt;
+        int ret;
+
+        ret = lock_device_hotplug_sysfs();
+        if (ret)
+                return ret;
+
+        cnt = arch_cpu_release(buf, count);
+
+        unlock_device_hotplug();
+        return cnt;
 }
 
 static DEVICE_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 35fa36898916..06051767393f 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -499,7 +499,7 @@ static void __device_release_driver(struct device *dev)
                                                      BUS_NOTIFY_UNBIND_DRIVER,
                                                      dev);
 
-                pm_runtime_put(dev);
+                pm_runtime_put_sync(dev);
 
                 if (dev->bus && dev->bus->remove)
                         dev->bus->remove(dev);
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 507379e7b763..545c4de412c3 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -91,7 +91,8 @@ static __always_inline struct devres * alloc_dr(dr_release_t release,
         if (unlikely(!dr))
                 return NULL;
 
-        memset(dr, 0, tot_size);
+        memset(dr, 0, offsetof(struct devres, data));
+
         INIT_LIST_HEAD(&dr->node.entry);
         dr->node.release = release;
         return dr;
@@ -110,7 +111,7 @@ void * __devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
 {
         struct devres *dr;
 
-        dr = alloc_dr(release, size, gfp);
+        dr = alloc_dr(release, size, gfp | __GFP_ZERO);
         if (unlikely(!dr))
                 return NULL;
         set_node_dbginfo(&dr->node, name, size);
@@ -135,7 +136,7 @@ void * devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
 {
         struct devres *dr;
 
-        dr = alloc_dr(release, size, gfp);
+        dr = alloc_dr(release, size, gfp | __GFP_ZERO);
         if (unlikely(!dr))
                 return NULL;
         return dr->data;
@@ -745,58 +746,62 @@ void devm_remove_action(struct device *dev, void (*action)(void *), void *data)
 EXPORT_SYMBOL_GPL(devm_remove_action);
 
 /*
- * Managed kzalloc/kfree
+ * Managed kmalloc/kfree
  */
-static void devm_kzalloc_release(struct device *dev, void *res)
+static void devm_kmalloc_release(struct device *dev, void *res)
 {
         /* noop */
 }
 
-static int devm_kzalloc_match(struct device *dev, void *res, void *data)
+static int devm_kmalloc_match(struct device *dev, void *res, void *data)
 {
         return res == data;
 }
 
 /**
- * devm_kzalloc - Resource-managed kzalloc
+ * devm_kmalloc - Resource-managed kmalloc
  * @dev: Device to allocate memory for
  * @size: Allocation size
  * @gfp: Allocation gfp flags
  *
- * Managed kzalloc.  Memory allocated with this function is
+ * Managed kmalloc.  Memory allocated with this function is
  * automatically freed on driver detach.  Like all other devres
  * resources, guaranteed alignment is unsigned long long.
  *
  * RETURNS:
  * Pointer to allocated memory on success, NULL on failure.
  */
-void * devm_kzalloc(struct device *dev, size_t size, gfp_t gfp)
+void * devm_kmalloc(struct device *dev, size_t size, gfp_t gfp)
 {
         struct devres *dr;
 
         /* use raw alloc_dr for kmalloc caller tracing */
-        dr = alloc_dr(devm_kzalloc_release, size, gfp);
+        dr = alloc_dr(devm_kmalloc_release, size, gfp);
         if (unlikely(!dr))
                 return NULL;
 
+        /*
+         * This is named devm_kzalloc_release for historical reasons
+         * The initial implementation did not support kmalloc, only kzalloc
+         */
         set_node_dbginfo(&dr->node, "devm_kzalloc_release", size);
         devres_add(dev, dr->data);
         return dr->data;
 }
-EXPORT_SYMBOL_GPL(devm_kzalloc);
+EXPORT_SYMBOL_GPL(devm_kmalloc);
 
 /**
  * devm_kfree - Resource-managed kfree
  * @dev: Device this memory belongs to
  * @p: Memory to free
  *
- * Free memory allocated with devm_kzalloc().
+ * Free memory allocated with devm_kmalloc().
  */
 void devm_kfree(struct device *dev, void *p)
 {
         int rc;
 
-        rc = devres_destroy(dev, devm_kzalloc_release, devm_kzalloc_match, p);
+        rc = devres_destroy(dev, devm_kmalloc_release, devm_kmalloc_match, p);
         WARN_ON(rc);
 }
 EXPORT_SYMBOL_GPL(devm_kfree);
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 7413d065906b..0f3820121e02 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -216,7 +216,7 @@ static int handle_create(const char *nodename, umode_t mode, kuid_t uid,
                 newattrs.ia_gid = gid;
                 newattrs.ia_valid = ATTR_MODE|ATTR_UID|ATTR_GID;
                 mutex_lock(&dentry->d_inode->i_mutex);
-                notify_change(dentry, &newattrs);
+                notify_change(dentry, &newattrs, NULL);
                 mutex_unlock(&dentry->d_inode->i_mutex);
 
                 /* mark as kernel-created inode */
@@ -322,9 +322,9 @@ static int handle_remove(const char *nodename, struct device *dev)
                         newattrs.ia_valid =
                                 ATTR_UID|ATTR_GID|ATTR_MODE;
                         mutex_lock(&dentry->d_inode->i_mutex);
-                        notify_change(dentry, &newattrs);
+                        notify_change(dentry, &newattrs, NULL);
                         mutex_unlock(&dentry->d_inode->i_mutex);
-                        err = vfs_unlink(parent.dentry->d_inode, dentry);
+                        err = vfs_unlink(parent.dentry->d_inode, dentry, NULL);
                         if (!err || err == -ENOENT)
                                 deleted = 1;
                 }
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 99802d6f3c60..165c2c299e57 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -49,7 +49,7 @@ struct cma *dma_contiguous_default_area;
 
 /*
  * Default global CMA area size can be defined in kernel's .config.
- * This is usefull mainly for distro maintainers to create a kernel
+ * This is useful mainly for distro maintainers to create a kernel
  * that works correctly for most supported systems.
  * The size can be set in bytes or as a percentage of the total memory
  * in the system.
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 10a4467c63f1..eb8fb94ae2c5 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -282,31 +282,35 @@ static noinline_for_stack long fw_file_size(struct file *file)
         return st.size;
 }
 
-static bool fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
+static int fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
 {
         long size;
         char *buf;
+        int rc;
 
         size = fw_file_size(file);
         if (size <= 0)
-                return false;
+                return -EINVAL;
         buf = vmalloc(size);
         if (!buf)
-                return false;
-        if (kernel_read(file, 0, buf, size) != size) {
+                return -ENOMEM;
+        rc = kernel_read(file, 0, buf, size);
+        if (rc != size) {
+                if (rc > 0)
+                        rc = -EIO;
                 vfree(buf);
-                return false;
+                return rc;
         }
         fw_buf->data = buf;
         fw_buf->size = size;
-        return true;
+        return 0;
 }
 
-static bool fw_get_filesystem_firmware(struct device *device,
+static int fw_get_filesystem_firmware(struct device *device,
                                        struct firmware_buf *buf)
 {
         int i;
-        bool success = false;
+        int rc = -ENOENT;
         char *path = __getname();
 
         for (i = 0; i < ARRAY_SIZE(fw_path); i++) {
@@ -321,14 +325,17 @@ static bool fw_get_filesystem_firmware(struct device *device,
                 file = filp_open(path, O_RDONLY, 0);
                 if (IS_ERR(file))
                         continue;
-                success = fw_read_file_contents(file, buf);
+                rc = fw_read_file_contents(file, buf);
                 fput(file);
-                if (success)
+                if (rc)
+                        dev_warn(device, "firmware, attempted to load %s, but failed with error %d\n",
+                                path, rc);
+                else
                         break;
         }
         __putname(path);
 
-        if (success) {
+        if (!rc) {
                 dev_dbg(device, "firmware: direct-loading firmware %s\n",
                         buf->fw_id);
                 mutex_lock(&fw_lock);
@@ -337,7 +344,7 @@ static bool fw_get_filesystem_firmware(struct device *device,
                 mutex_unlock(&fw_lock);
         }
 
-        return success;
+        return rc;
 }
 
 /* firmware holds the ownership of pages */
@@ -1086,9 +1093,14 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
                 }
         }
 
-        if (!fw_get_filesystem_firmware(device, fw->priv))
+        ret = fw_get_filesystem_firmware(device, fw->priv);
+        if (ret) {
+                dev_warn(device, "Direct firmware load failed with error %d\n",
+                         ret);
+                dev_warn(device, "Falling back to user helper\n");
                 ret = fw_load_from_user_helper(fw, name, device,
                                                uevent, nowait, timeout);
+        }
 
         /* don't cache firmware handled without uevent */
         if (!ret)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 4f8bef3eb5a8..3a94b799f166 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -432,7 +432,7 @@ struct platform_device *platform_device_register_full(
                 goto err_alloc;
 
         pdev->dev.parent = pdevinfo->parent;
-        ACPI_HANDLE_SET(&pdev->dev, pdevinfo->acpi_node.handle);
+        ACPI_COMPANION_SET(&pdev->dev, pdevinfo->acpi_node.companion);
 
         if (pdevinfo->dma_mask) {
                 /*
@@ -463,7 +463,7 @@ struct platform_device *platform_device_register_full(
         ret = platform_device_add(pdev);
         if (ret) {
 err:
-                ACPI_HANDLE_SET(&pdev->dev, NULL);
+                ACPI_COMPANION_SET(&pdev->dev, NULL);
                 kfree(pdev->dev.dma_mask);
 
 err_alloc:
@@ -488,6 +488,11 @@ static int platform_drv_probe(struct device *_dev)
         if (ret && ACPI_HANDLE(_dev))
                 acpi_dev_pm_detach(_dev, true);
 
+        if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) {
+                dev_warn(_dev, "probe deferral not supported\n");
+                ret = -ENXIO;
+        }
+
         return ret;
 }
 
@@ -553,8 +558,7 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
 /**
  * platform_driver_probe - register driver for non-hotpluggable device
  * @drv: platform driver structure
- * @probe: the driver probe routine, probably from an __init section,
- *         must not return -EPROBE_DEFER.
+ * @probe: the driver probe routine, probably from an __init section
  *
  * Use this instead of platform_driver_register() when you know the device
  * is not hotpluggable and has already been registered, and you want to
@@ -565,8 +569,7 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
  * into system-on-chip processors, where the controller devices have been
  * configured as part of board setup.
  *
- * This is incompatible with deferred probing so probe() must not
- * return -EPROBE_DEFER.
+ * Note that this is incompatible with deferred probing.
  *
  * Returns zero if the driver registered and bound to a device, else returns
  * a negative error code and with the driver not registered.
@@ -576,6 +579,12 @@ int __init_or_module platform_driver_probe(struct platform_driver *drv,
 {
         int retval, code;
 
+        /*
+         * Prevent driver from requesting probe deferral to avoid further
+         * futile probe attempts.
+         */
+        drv->prevent_deferred_probe = true;
+
         /* make sure driver won't have bind/unbind attributes */
         drv->driver.suppress_bind_attrs = true;
 
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 9f098a82cf04..1b41fca3d65a 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -30,6 +30,8 @@
 #include <linux/suspend.h>
 #include <trace/events/power.h>
 #include <linux/cpuidle.h>
+#include <linux/timer.h>
+
 #include "../base.h"
 #include "power.h"
 
@@ -390,6 +392,71 @@ static int dpm_run_callback(pm_callback_t cb, struct device *dev,
         return error;
 }
 
+#ifdef CONFIG_DPM_WATCHDOG
+struct dpm_watchdog {
+        struct device           *dev;
+        struct task_struct      *tsk;
+        struct timer_list       timer;
+};
+
+#define DECLARE_DPM_WATCHDOG_ON_STACK(wd) \
+        struct dpm_watchdog wd
+
+/**
+ * dpm_watchdog_handler - Driver suspend / resume watchdog handler.
+ * @data: Watchdog object address.
+ *
+ * Called when a driver has timed out suspending or resuming.
+ * There's not much we can do here to recover so panic() to
+ * capture a crash-dump in pstore.
+ */
+static void dpm_watchdog_handler(unsigned long data)
+{
+        struct dpm_watchdog *wd = (void *)data;
+
+        dev_emerg(wd->dev, "**** DPM device timeout ****\n");
+        show_stack(wd->tsk, NULL);
+        panic("%s %s: unrecoverable failure\n",
+                dev_driver_string(wd->dev), dev_name(wd->dev));
+}
+
+/**
+ * dpm_watchdog_set - Enable pm watchdog for given device.
+ * @wd: Watchdog. Must be allocated on the stack.
+ * @dev: Device to handle.
+ */
+static void dpm_watchdog_set(struct dpm_watchdog *wd, struct device *dev)
+{
+        struct timer_list *timer = &wd->timer;
+
+        wd->dev = dev;
+        wd->tsk = current;
+
+        init_timer_on_stack(timer);
+        /* use same timeout value for both suspend and resume */
+        timer->expires = jiffies + HZ * CONFIG_DPM_WATCHDOG_TIMEOUT;
+        timer->function = dpm_watchdog_handler;
+        timer->data = (unsigned long)wd;
+        add_timer(timer);
+}
+
+/**
+ * dpm_watchdog_clear - Disable suspend/resume watchdog.
+ * @wd: Watchdog to disable.
+ */
+static void dpm_watchdog_clear(struct dpm_watchdog *wd)
+{
+        struct timer_list *timer = &wd->timer;
+
+        del_timer_sync(timer);
+        destroy_timer_on_stack(timer);
+}
+#else
+#define DECLARE_DPM_WATCHDOG_ON_STACK(wd)
+#define dpm_watchdog_set(x, y)
+#define dpm_watchdog_clear(x)
+#endif
+
 /*------------------------- Resume routines -------------------------*/
 
 /**
@@ -576,6 +643,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
         pm_callback_t callback = NULL;
         char *info = NULL;
         int error = 0;
+        DECLARE_DPM_WATCHDOG_ON_STACK(wd);
 
         TRACE_DEVICE(dev);
         TRACE_RESUME(0);
@@ -584,6 +652,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
                 goto Complete;
 
         dpm_wait(dev->parent, async);
+        dpm_watchdog_set(&wd, dev);
         device_lock(dev);
 
         /*
@@ -642,6 +711,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
 
  Unlock:
         device_unlock(dev);
+        dpm_watchdog_clear(&wd);
 
  Complete:
         complete_all(&dev->power.completion);
@@ -687,7 +757,7 @@ void dpm_resume(pm_message_t state)
         async_error = 0;
 
         list_for_each_entry(dev, &dpm_suspended_list, power.entry) {
-                INIT_COMPLETION(dev->power.completion);
+                reinit_completion(&dev->power.completion);
                 if (is_async(dev)) {
                         get_device(dev);
                         async_schedule(async_resume, dev);
@@ -1060,6 +1130,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
         pm_callback_t callback = NULL;
         char *info = NULL;
         int error = 0;
+        DECLARE_DPM_WATCHDOG_ON_STACK(wd);
 
         dpm_wait_for_children(dev, async);
 
@@ -1083,6 +1154,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
         if (dev->power.syscore)
                 goto Complete;
 
+        dpm_watchdog_set(&wd, dev);
         device_lock(dev);
 
         if (dev->pm_domain) {
@@ -1139,6 +1211,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
         }
 
         device_unlock(dev);
+        dpm_watchdog_clear(&wd);
 
  Complete:
         complete_all(&dev->power.completion);
@@ -1164,7 +1237,7 @@ static void async_suspend(void *data, async_cookie_t cookie)
 
 static int device_suspend(struct device *dev)
 {
-        INIT_COMPLETION(dev->power.completion);
+        reinit_completion(&dev->power.completion);
 
         if (pm_async_enabled && dev->power.async_suspend) {
                 get_device(dev);
@@ -1277,6 +1350,9 @@ static int device_prepare(struct device *dev, pm_message_t state)
 
         device_unlock(dev);
 
+        if (error)
+                pm_runtime_put(dev);
+
         return error;
 }
 
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index ef89897c6043..fa4187418440 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c
@@ -21,7 +21,7 @@
 #include <linux/list.h>
 #include <linux/rculist.h>
 #include <linux/rcupdate.h>
-#include <linux/opp.h>
+#include <linux/pm_opp.h>
 #include <linux/of.h>
 #include <linux/export.h>
 
@@ -42,7 +42,7 @@
  */
 
 /**
- * struct opp - Generic OPP description structure
+ * struct dev_pm_opp - Generic OPP description structure
  * @node:       opp list node. The nodes are maintained throughout the lifetime
  *              of boot. It is expected only an optimal set of OPPs are
  *              added to the library by the SoC framework.
@@ -59,7 +59,7 @@
  *
  * This structure stores the OPP information for a given device.
  */
-struct opp {
+struct dev_pm_opp {
         struct list_head node;
 
         bool available;
@@ -136,7 +136,7 @@ static struct device_opp *find_device_opp(struct device *dev)
 }
 
 /**
- * opp_get_voltage() - Gets the voltage corresponding to an available opp
+ * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an available opp
  * @opp:        opp for which voltage has to be returned for
  *
  * Return voltage in micro volt corresponding to the opp, else
@@ -150,9 +150,9 @@ static struct device_opp *find_device_opp(struct device *dev)
  * prior to unlocking with rcu_read_unlock() to maintain the integrity of the
  * pointer.
  */
-unsigned long opp_get_voltage(struct opp *opp)
+unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
 {
-        struct opp *tmp_opp;
+        struct dev_pm_opp *tmp_opp;
         unsigned long v = 0;
 
         tmp_opp = rcu_dereference(opp);
@@ -163,10 +163,10 @@ unsigned long opp_get_voltage(struct opp *opp)
 
         return v;
 }
-EXPORT_SYMBOL_GPL(opp_get_voltage);
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage);
 
 /**
- * opp_get_freq() - Gets the frequency corresponding to an available opp
+ * dev_pm_opp_get_freq() - Gets the frequency corresponding to an available opp
  * @opp:        opp for which frequency has to be returned for
  *
  * Return frequency in hertz corresponding to the opp, else
@@ -180,9 +180,9 @@ EXPORT_SYMBOL_GPL(opp_get_voltage);
  * prior to unlocking with rcu_read_unlock() to maintain the integrity of the
  * pointer.
  */
-unsigned long opp_get_freq(struct opp *opp)
+unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
 {
-        struct opp *tmp_opp;
+        struct dev_pm_opp *tmp_opp;
         unsigned long f = 0;
 
         tmp_opp = rcu_dereference(opp);
@@ -193,10 +193,10 @@ unsigned long opp_get_freq(struct opp *opp)
 
         return f;
 }
-EXPORT_SYMBOL_GPL(opp_get_freq);
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
 
 /**
- * opp_get_opp_count() - Get number of opps available in the opp list
+ * dev_pm_opp_get_opp_count() - Get number of opps available in the opp list
  * @dev:        device for which we do this operation
  *
  * This function returns the number of available opps if there are any,
@@ -206,10 +206,10 @@ EXPORT_SYMBOL_GPL(opp_get_freq);
  * internally references two RCU protected structures: device_opp and opp which
  * are safe as long as we are under a common RCU locked section.
  */
-int opp_get_opp_count(struct device *dev)
+int dev_pm_opp_get_opp_count(struct device *dev)
 {
         struct device_opp *dev_opp;
-        struct opp *temp_opp;
+        struct dev_pm_opp *temp_opp;
         int count = 0;
 
         dev_opp = find_device_opp(dev);
@@ -226,10 +226,10 @@ int opp_get_opp_count(struct device *dev)
 
         return count;
 }
-EXPORT_SYMBOL_GPL(opp_get_opp_count);
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count);
 
 /**
- * opp_find_freq_exact() - search for an exact frequency
+ * dev_pm_opp_find_freq_exact() - search for an exact frequency
  * @dev:                device for which we do this operation
  * @freq:               frequency to search for
  * @available:          true/false - match for available opp
@@ -254,11 +254,12 @@ EXPORT_SYMBOL_GPL(opp_get_opp_count);
  * under the locked area. The pointer returned must be used prior to unlocking
  * with rcu_read_unlock() to maintain the integrity of the pointer.
  */
-struct opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
-                                bool available)
+struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
+                                              unsigned long freq,
+                                              bool available)
 {
         struct device_opp *dev_opp;
-        struct opp *temp_opp, *opp = ERR_PTR(-ERANGE);
+        struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
 
         dev_opp = find_device_opp(dev);
         if (IS_ERR(dev_opp)) {
@@ -277,10 +278,10 @@ struct opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
 
         return opp;
 }
-EXPORT_SYMBOL_GPL(opp_find_freq_exact);
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact);
 
 /**
- * opp_find_freq_ceil() - Search for an rounded ceil freq
+ * dev_pm_opp_find_freq_ceil() - Search for an rounded ceil freq
  * @dev:        device for which we do this operation
  * @freq:       Start frequency
  *
@@ -300,10 +301,11 @@ EXPORT_SYMBOL_GPL(opp_find_freq_exact);
  * under the locked area. The pointer returned must be used prior to unlocking
  * with rcu_read_unlock() to maintain the integrity of the pointer.
  */
-struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq)
+struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
+                                             unsigned long *freq)
 {
         struct device_opp *dev_opp;
-        struct opp *temp_opp, *opp = ERR_PTR(-ERANGE);
+        struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
 
         if (!dev || !freq) {
                 dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
@@ -324,10 +326,10 @@ struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq)
 
         return opp;
 }
-EXPORT_SYMBOL_GPL(opp_find_freq_ceil);
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil);
 
 /**
- * opp_find_freq_floor() - Search for a rounded floor freq
+ * dev_pm_opp_find_freq_floor() - Search for a rounded floor freq
  * @dev:        device for which we do this operation
  * @freq:       Start frequency
  *
@@ -347,10 +349,11 @@ EXPORT_SYMBOL_GPL(opp_find_freq_ceil);
  * under the locked area. The pointer returned must be used prior to unlocking
  * with rcu_read_unlock() to maintain the integrity of the pointer.
  */
-struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq)
+struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
+                                              unsigned long *freq)
 {
         struct device_opp *dev_opp;
-        struct opp *temp_opp, *opp = ERR_PTR(-ERANGE);
+        struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
 
         if (!dev || !freq) {
                 dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
@@ -375,17 +378,17 @@ struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq)
 
         return opp;
 }
-EXPORT_SYMBOL_GPL(opp_find_freq_floor);
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
 
 /**
- * opp_add()  - Add an OPP table from a table definitions
+ * dev_pm_opp_add()  - Add an OPP table from a table definitions
  * @dev:        device for which we do this operation
  * @freq:       Frequency in Hz for this OPP
  * @u_volt:     Voltage in uVolts for this OPP
  *
  * This function adds an opp definition to the opp list and returns status.
  * The opp is made available by default and it can be controlled using
- * opp_enable/disable functions.
+ * dev_pm_opp_enable/disable functions.
  *
  * Locking: The internal device_opp and opp structures are RCU protected.
  * Hence this function internally uses RCU updater strategy with mutex locks
@@ -393,14 +396,14 @@ EXPORT_SYMBOL_GPL(opp_find_freq_floor);
  * that this function is *NOT* called under RCU protection or in contexts where
  * mutex cannot be locked.
  */
-int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
+int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
 {
         struct device_opp *dev_opp = NULL;
-        struct opp *opp, *new_opp;
+        struct dev_pm_opp *opp, *new_opp;
         struct list_head *head;
 
         /* allocate new OPP node */
-        new_opp = kzalloc(sizeof(struct opp), GFP_KERNEL);
+        new_opp = kzalloc(sizeof(*new_opp), GFP_KERNEL);
         if (!new_opp) {
                 dev_warn(dev, "%s: Unable to create new OPP node\n", __func__);
                 return -ENOMEM;
@@ -460,7 +463,7 @@ int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
         srcu_notifier_call_chain(&dev_opp->head, OPP_EVENT_ADD, new_opp);
         return 0;
 }
-EXPORT_SYMBOL_GPL(opp_add);
+EXPORT_SYMBOL_GPL(dev_pm_opp_add);
 
 /**
  * opp_set_availability() - helper to set the availability of an opp
@@ -485,11 +488,11 @@ static int opp_set_availability(struct device *dev, unsigned long freq,
                 bool availability_req)
 {
         struct device_opp *tmp_dev_opp, *dev_opp = ERR_PTR(-ENODEV);
-        struct opp *new_opp, *tmp_opp, *opp = ERR_PTR(-ENODEV);
+        struct dev_pm_opp *new_opp, *tmp_opp, *opp = ERR_PTR(-ENODEV);
         int r = 0;
 
         /* keep the node allocated */
-        new_opp = kmalloc(sizeof(struct opp), GFP_KERNEL);
+        new_opp = kmalloc(sizeof(*new_opp), GFP_KERNEL);
         if (!new_opp) {
                 dev_warn(dev, "%s: Unable to create OPP\n", __func__);
                 return -ENOMEM;
@@ -552,13 +555,13 @@ unlock:
 }
 
 /**
- * opp_enable() - Enable a specific OPP
+ * dev_pm_opp_enable() - Enable a specific OPP
  * @dev:        device for which we do this operation
  * @freq:       OPP frequency to enable
  *
  * Enables a provided opp. If the operation is valid, this returns 0, else the
  * corresponding error value. It is meant to be used for users an OPP available
- * after being temporarily made unavailable with opp_disable.
+ * after being temporarily made unavailable with dev_pm_opp_disable.
  *
  * Locking: The internal device_opp and opp structures are RCU protected.
  * Hence this function indirectly uses RCU and mutex locks to keep the
@@ -566,21 +569,21 @@ unlock:
  * this function is *NOT* called under RCU protection or in contexts where
  * mutex locking or synchronize_rcu() blocking calls cannot be used.
  */
-int opp_enable(struct device *dev, unsigned long freq)
+int dev_pm_opp_enable(struct device *dev, unsigned long freq)
 {
         return opp_set_availability(dev, freq, true);
 }
-EXPORT_SYMBOL_GPL(opp_enable);
+EXPORT_SYMBOL_GPL(dev_pm_opp_enable);
 
 /**
- * opp_disable() - Disable a specific OPP
+ * dev_pm_opp_disable() - Disable a specific OPP
  * @dev:        device for which we do this operation
  * @freq:       OPP frequency to disable
  *
  * Disables a provided opp. If the operation is valid, this returns
  * 0, else the corresponding error value. It is meant to be a temporary
  * control by users to make this OPP not available until the circumstances are
- * right to make it available again (with a call to opp_enable).
+ * right to make it available again (with a call to dev_pm_opp_enable).
  *
  * Locking: The internal device_opp and opp structures are RCU protected.
  * Hence this function indirectly uses RCU and mutex locks to keep the
@@ -588,15 +591,15 @@ EXPORT_SYMBOL_GPL(opp_enable);
  * this function is *NOT* called under RCU protection or in contexts where
  * mutex locking or synchronize_rcu() blocking calls cannot be used.
  */
-int opp_disable(struct device *dev, unsigned long freq)
+int dev_pm_opp_disable(struct device *dev, unsigned long freq)
 {
         return opp_set_availability(dev, freq, false);
 }
-EXPORT_SYMBOL_GPL(opp_disable);
+EXPORT_SYMBOL_GPL(dev_pm_opp_disable);
 
 #ifdef CONFIG_CPU_FREQ
 /**
- * opp_init_cpufreq_table() - create a cpufreq table for a device
+ * dev_pm_opp_init_cpufreq_table() - create a cpufreq table for a device
  * @dev:        device for which we do this operation
  * @table:      Cpufreq table returned back to caller
  *
@@ -619,11 +622,11 @@ EXPORT_SYMBOL_GPL(opp_disable);
  * Callers should ensure that this function is *NOT* called under RCU protection
  * or in contexts where mutex locking cannot be used.
  */
-int opp_init_cpufreq_table(struct device *dev,
+int dev_pm_opp_init_cpufreq_table(struct device *dev,
                             struct cpufreq_frequency_table **table)
 {
         struct device_opp *dev_opp;
-        struct opp *opp;
+        struct dev_pm_opp *opp;
         struct cpufreq_frequency_table *freq_table;
         int i = 0;
 
@@ -639,7 +642,7 @@ int opp_init_cpufreq_table(struct device *dev,
         }
 
         freq_table = kzalloc(sizeof(struct cpufreq_frequency_table) *
-                             (opp_get_opp_count(dev) + 1), GFP_KERNEL);
+                             (dev_pm_opp_get_opp_count(dev) + 1), GFP_KERNEL);
         if (!freq_table) {
                 mutex_unlock(&dev_opp_list_lock);
                 dev_warn(dev, "%s: Unable to allocate frequency table\n",
@@ -663,16 +666,16 @@ int opp_init_cpufreq_table(struct device *dev,
 
         return 0;
 }
-EXPORT_SYMBOL_GPL(opp_init_cpufreq_table);
+EXPORT_SYMBOL_GPL(dev_pm_opp_init_cpufreq_table);
 
 /**
- * opp_free_cpufreq_table() - free the cpufreq table
+ * dev_pm_opp_free_cpufreq_table() - free the cpufreq table
  * @dev:        device for which we do this operation
  * @table:      table to free
  *
- * Free up the table allocated by opp_init_cpufreq_table
+ * Free up the table allocated by dev_pm_opp_init_cpufreq_table
  */
-void opp_free_cpufreq_table(struct device *dev,
+void dev_pm_opp_free_cpufreq_table(struct device *dev,
                                 struct cpufreq_frequency_table **table)
 {
         if (!table)
@@ -681,14 +684,14 @@ void opp_free_cpufreq_table(struct device *dev,
         kfree(*table);
         *table = NULL;
 }
-EXPORT_SYMBOL_GPL(opp_free_cpufreq_table);
+EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table);
 #endif          /* CONFIG_CPU_FREQ */
 
 /**
- * opp_get_notifier() - find notifier_head of the device with opp
+ * dev_pm_opp_get_notifier() - find notifier_head of the device with opp
  * @dev:        device pointer used to lookup device OPPs.
  */
-struct srcu_notifier_head *opp_get_notifier(struct device *dev)
+struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev)
 {
         struct device_opp *dev_opp = find_device_opp(dev);
 
@@ -732,7 +735,7 @@ int of_init_opp_table(struct device *dev)
                 unsigned long freq = be32_to_cpup(val++) * 1000;
                 unsigned long volt = be32_to_cpup(val++);
 
-                if (opp_add(dev, freq, volt)) {
+                if (dev_pm_opp_add(dev, freq, volt)) {
                         dev_warn(dev, "%s: Failed to add OPP %ld\n",
                                  __func__, freq);
                         continue;
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 268a35097578..72e00e66ecc5 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -258,7 +258,8 @@ static int __rpm_callback(int (*cb)(struct device *), struct device *dev)
  * Check if the device's runtime PM status allows it to be suspended.  If
  * another idle notification has been started earlier, return immediately.  If
  * the RPM_ASYNC flag is set then queue an idle-notification request; otherwise
- * run the ->runtime_idle() callback directly.
+ * run the ->runtime_idle() callback directly. If the ->runtime_idle callback
+ * doesn't exist or if it returns 0, call rpm_suspend with the RPM_AUTO flag.
  *
  * This function must be called under dev->power.lock with interrupts disabled.
  */
@@ -331,7 +332,7 @@ static int rpm_idle(struct device *dev, int rpmflags)
 
  out:
         trace_rpm_return_int(dev, _THIS_IP_, retval);
-        return retval ? retval : rpm_suspend(dev, rpmflags);
+        return retval ? retval : rpm_suspend(dev, rpmflags | RPM_AUTO);
 }
 
 /**