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-rw-r--r--drivers/base/Kconfig7
-rw-r--r--drivers/base/attribute_container.c1
-rw-r--r--drivers/base/bus.c1
-rw-r--r--drivers/base/class.c11
-rw-r--r--drivers/base/core.c202
-rw-r--r--drivers/base/cpu.c19
-rw-r--r--drivers/base/dd.c4
-rw-r--r--drivers/base/devres.c1
-rw-r--r--drivers/base/devtmpfs.c6
-rw-r--r--drivers/base/dma-coherent.c1
-rw-r--r--drivers/base/dma-mapping.c1
-rw-r--r--drivers/base/driver.c1
-rw-r--r--drivers/base/firmware_class.c209
-rw-r--r--drivers/base/iommu.c43
-rw-r--r--drivers/base/memory.c3
-rw-r--r--drivers/base/module.c5
-rw-r--r--drivers/base/node.c11
-rw-r--r--drivers/base/platform.c71
-rw-r--r--drivers/base/power/Makefile2
-rw-r--r--drivers/base/power/main.c32
-rw-r--r--drivers/base/power/runtime.c64
-rw-r--r--drivers/base/power/sysfs.c123
-rw-r--r--drivers/base/power/wakeup.c247
-rw-r--r--drivers/base/sys.c1
-rw-r--r--drivers/base/topology.c2
25 files changed, 880 insertions, 188 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index fd52c48..ef38aff 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -18,9 +18,9 @@ config UEVENT_HELPER_PATH
config DEVTMPFS
bool "Maintain a devtmpfs filesystem to mount at /dev"
- depends on HOTPLUG && SHMEM && TMPFS
+ depends on HOTPLUG
help
- This creates a tmpfs filesystem instance early at bootup.
+ This creates a tmpfs/ramfs filesystem instance early at bootup.
In this filesystem, the kernel driver core maintains device
nodes with their default names and permissions for all
registered devices with an assigned major/minor number.
@@ -33,6 +33,9 @@ config DEVTMPFS
functional /dev without any further help. It also allows simple
rescue systems, and reliably handles dynamic major/minor numbers.
+ Notice: if CONFIG_TMPFS isn't enabled, the simpler ramfs
+ file system will be used instead.
+
config DEVTMPFS_MOUNT
bool "Automount devtmpfs at /dev, after the kernel mounted the rootfs"
depends on DEVTMPFS
diff --git a/drivers/base/attribute_container.c b/drivers/base/attribute_container.c
index b9cda05..8fc200b 100644
--- a/drivers/base/attribute_container.c
+++ b/drivers/base/attribute_container.c
@@ -328,6 +328,7 @@ attribute_container_add_attrs(struct device *classdev)
return sysfs_create_group(&classdev->kobj, cont->grp);
for (i = 0; attrs[i]; i++) {
+ sysfs_attr_init(&attrs[i]->attr);
error = device_create_file(classdev, attrs[i]);
if (error)
return error;
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 71f6af5..12eec3f 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -13,6 +13,7 @@
#include <linux/device.h>
#include <linux/module.h>
#include <linux/errno.h>
+#include <linux/slab.h>
#include <linux/init.h>
#include <linux/string.h>
#include "base.h"
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 0147f47..8e231d0 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -63,6 +63,14 @@ static void class_release(struct kobject *kobj)
kfree(cp);
}
+static const struct kobj_ns_type_operations *class_child_ns_type(struct kobject *kobj)
+{
+ struct class_private *cp = to_class(kobj);
+ struct class *class = cp->class;
+
+ return class->ns_type;
+}
+
static const struct sysfs_ops class_sysfs_ops = {
.show = class_attr_show,
.store = class_attr_store,
@@ -71,6 +79,7 @@ static const struct sysfs_ops class_sysfs_ops = {
static struct kobj_type class_ktype = {
.sysfs_ops = &class_sysfs_ops,
.release = class_release,
+ .child_ns_type = class_child_ns_type,
};
/* Hotplug events for classes go to the class class_subsys */
@@ -219,6 +228,8 @@ static void class_create_release(struct class *cls)
* This is used to create a struct class pointer that can then be used
* in calls to device_create().
*
+ * Returns &struct class pointer on success, or ERR_PTR() on error.
+ *
* Note, the pointer created here is to be destroyed when finished by
* making a call to class_destroy().
*/
diff --git a/drivers/base/core.c b/drivers/base/core.c
index ef55df3..f8e7272 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -20,7 +20,6 @@
#include <linux/notifier.h>
#include <linux/genhd.h>
#include <linux/kallsyms.h>
-#include <linux/semaphore.h>
#include <linux/mutex.h>
#include <linux/async.h>
@@ -132,9 +131,21 @@ static void device_release(struct kobject *kobj)
kfree(p);
}
+static const void *device_namespace(struct kobject *kobj)
+{
+ struct device *dev = to_dev(kobj);
+ const void *ns = NULL;
+
+ if (dev->class && dev->class->ns_type)
+ ns = dev->class->namespace(dev);
+
+ return ns;
+}
+
static struct kobj_type device_ktype = {
.release = device_release,
.sysfs_ops = &dev_sysfs_ops,
+ .namespace = device_namespace,
};
@@ -559,10 +570,10 @@ void device_initialize(struct device *dev)
dev->kobj.kset = devices_kset;
kobject_init(&dev->kobj, &device_ktype);
INIT_LIST_HEAD(&dev->dma_pools);
- init_MUTEX(&dev->sem);
+ mutex_init(&dev->mutex);
+ lockdep_set_novalidate_class(&dev->mutex);
spin_lock_init(&dev->devres_lock);
INIT_LIST_HEAD(&dev->devres_head);
- device_init_wakeup(dev, 0);
device_pm_init(dev);
set_dev_node(dev, -1);
}
@@ -596,11 +607,59 @@ static struct kobject *virtual_device_parent(struct device *dev)
return virtual_dir;
}
-static struct kobject *get_device_parent(struct device *dev,
- struct device *parent)
+struct class_dir {
+ struct kobject kobj;
+ struct class *class;
+};
+
+#define to_class_dir(obj) container_of(obj, struct class_dir, kobj)
+
+static void class_dir_release(struct kobject *kobj)
+{
+ struct class_dir *dir = to_class_dir(kobj);
+ kfree(dir);
+}
+
+static const
+struct kobj_ns_type_operations *class_dir_child_ns_type(struct kobject *kobj)
+{
+ struct class_dir *dir = to_class_dir(kobj);
+ return dir->class->ns_type;
+}
+
+static struct kobj_type class_dir_ktype = {
+ .release = class_dir_release,
+ .sysfs_ops = &kobj_sysfs_ops,
+ .child_ns_type = class_dir_child_ns_type
+};
+
+static struct kobject *
+class_dir_create_and_add(struct class *class, struct kobject *parent_kobj)
{
+ struct class_dir *dir;
int retval;
+ dir = kzalloc(sizeof(*dir), GFP_KERNEL);
+ if (!dir)
+ return NULL;
+
+ dir->class = class;
+ kobject_init(&dir->kobj, &class_dir_ktype);
+
+ dir->kobj.kset = &class->p->class_dirs;
+
+ retval = kobject_add(&dir->kobj, parent_kobj, "%s", class->name);
+ if (retval < 0) {
+ kobject_put(&dir->kobj);
+ return NULL;
+ }
+ return &dir->kobj;
+}
+
+
+static struct kobject *get_device_parent(struct device *dev,
+ struct device *parent)
+{
if (dev->class) {
static DEFINE_MUTEX(gdp_mutex);
struct kobject *kobj = NULL;
@@ -614,7 +673,7 @@ static struct kobject *get_device_parent(struct device *dev,
*/
if (parent == NULL)
parent_kobj = virtual_device_parent(dev);
- else if (parent->class)
+ else if (parent->class && !dev->class->ns_type)
return &parent->kobj;
else
parent_kobj = &parent->kobj;
@@ -635,18 +694,7 @@ static struct kobject *get_device_parent(struct device *dev,
}
/* or create a new class-directory at the parent device */
- k = kobject_create();
- if (!k) {
- mutex_unlock(&gdp_mutex);
- return NULL;
- }
- k->kset = &dev->class->p->class_dirs;
- retval = kobject_add(k, parent_kobj, "%s", dev->class->name);
- if (retval < 0) {
- mutex_unlock(&gdp_mutex);
- kobject_put(k);
- return NULL;
- }
+ k = class_dir_create_and_add(dev->class, parent_kobj);
/* do not emit an uevent for this simple "glue" directory */
mutex_unlock(&gdp_mutex);
return k;
@@ -738,7 +786,7 @@ out_device:
out_busid:
if (dev->kobj.parent != &dev->class->p->class_subsys.kobj &&
device_is_not_partition(dev))
- sysfs_remove_link(&dev->class->p->class_subsys.kobj,
+ sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj,
dev_name(dev));
#else
/* link in the class directory pointing to the device */
@@ -756,7 +804,7 @@ out_busid:
return 0;
out_busid:
- sysfs_remove_link(&dev->class->p->class_subsys.kobj, dev_name(dev));
+ sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj, dev_name(dev));
#endif
out_subsys:
@@ -784,13 +832,13 @@ static void device_remove_class_symlinks(struct device *dev)
if (dev->kobj.parent != &dev->class->p->class_subsys.kobj &&
device_is_not_partition(dev))
- sysfs_remove_link(&dev->class->p->class_subsys.kobj,
+ sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj,
dev_name(dev));
#else
if (dev->parent && device_is_not_partition(dev))
sysfs_remove_link(&dev->kobj, "device");
- sysfs_remove_link(&dev->class->p->class_subsys.kobj, dev_name(dev));
+ sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj, dev_name(dev));
#endif
sysfs_remove_link(&dev->kobj, "subsystem");
@@ -1345,6 +1393,8 @@ static void root_device_release(struct device *dev)
* 'module' symlink which points to the @owner directory
* in sysfs.
*
+ * Returns &struct device pointer on success, or ERR_PTR() on error.
+ *
* Note: You probably want to use root_device_register().
*/
struct device *__root_device_register(const char *name, struct module *owner)
@@ -1370,7 +1420,7 @@ struct device *__root_device_register(const char *name, struct module *owner)
return ERR_PTR(err);
}
-#ifdef CONFIG_MODULE /* gotta find a "cleaner" way to do this */
+#ifdef CONFIG_MODULES /* gotta find a "cleaner" way to do this */
if (owner) {
struct module_kobject *mk = &owner->mkobj;
@@ -1432,6 +1482,8 @@ static void device_create_release(struct device *dev)
* Any further sysfs files that might be required can be created using this
* pointer.
*
+ * Returns &struct device pointer on success, or ERR_PTR() on error.
+ *
* Note: the struct class passed to this function must have previously
* been created with a call to class_create().
*/
@@ -1492,6 +1544,8 @@ EXPORT_SYMBOL_GPL(device_create_vargs);
* Any further sysfs files that might be required can be created using this
* pointer.
*
+ * Returns &struct device pointer on success, or ERR_PTR() on error.
+ *
* Note: the struct class passed to this function must have previously
* been created with a call to class_create().
*/
@@ -1570,6 +1624,14 @@ int device_rename(struct device *dev, char *new_name)
goto out;
}
+#ifndef CONFIG_SYSFS_DEPRECATED
+ if (dev->class) {
+ error = sysfs_rename_link(&dev->class->p->class_subsys.kobj,
+ &dev->kobj, old_device_name, new_name);
+ if (error)
+ goto out;
+ }
+#endif
error = kobject_rename(&dev->kobj, new_name);
if (error)
goto out;
@@ -1584,11 +1646,6 @@ int device_rename(struct device *dev, char *new_name)
new_class_name);
}
}
-#else
- if (dev->class) {
- error = sysfs_rename_link(&dev->class->p->class_subsys.kobj,
- &dev->kobj, old_device_name, new_name);
- }
#endif
out:
@@ -1729,10 +1786,25 @@ EXPORT_SYMBOL_GPL(device_move);
*/
void device_shutdown(void)
{
- struct device *dev, *devn;
+ struct device *dev;
+
+ spin_lock(&devices_kset->list_lock);
+ /*
+ * Walk the devices list backward, shutting down each in turn.
+ * Beware that device unplug events may also start pulling
+ * devices offline, even as the system is shutting down.
+ */
+ while (!list_empty(&devices_kset->list)) {
+ dev = list_entry(devices_kset->list.prev, struct device,
+ kobj.entry);
+ get_device(dev);
+ /*
+ * Make sure the device is off the kset list, in the
+ * event that dev->*->shutdown() doesn't remove it.
+ */
+ list_del_init(&dev->kobj.entry);
+ spin_unlock(&devices_kset->list_lock);
- list_for_each_entry_safe_reverse(dev, devn, &devices_kset->list,
- kobj.entry) {
if (dev->bus && dev->bus->shutdown) {
dev_dbg(dev, "shutdown\n");
dev->bus->shutdown(dev);
@@ -1740,6 +1812,74 @@ void device_shutdown(void)
dev_dbg(dev, "shutdown\n");
dev->driver->shutdown(dev);
}
+ put_device(dev);
+
+ spin_lock(&devices_kset->list_lock);
}
+ spin_unlock(&devices_kset->list_lock);
async_synchronize_full();
}
+
+/*
+ * Device logging functions
+ */
+
+#ifdef CONFIG_PRINTK
+
+static int __dev_printk(const char *level, const struct device *dev,
+ struct va_format *vaf)
+{
+ if (!dev)
+ return printk("%s(NULL device *): %pV", level, vaf);
+
+ return printk("%s%s %s: %pV",
+ level, dev_driver_string(dev), dev_name(dev), vaf);
+}
+
+int dev_printk(const char *level, const struct device *dev,
+ const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+ int r;
+
+ va_start(args, fmt);
+
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ r = __dev_printk(level, dev, &vaf);
+ va_end(args);
+
+ return r;
+}
+EXPORT_SYMBOL(dev_printk);
+
+#define define_dev_printk_level(func, kern_level) \
+int func(const struct device *dev, const char *fmt, ...) \
+{ \
+ struct va_format vaf; \
+ va_list args; \
+ int r; \
+ \
+ va_start(args, fmt); \
+ \
+ vaf.fmt = fmt; \
+ vaf.va = &args; \
+ \
+ r = __dev_printk(kern_level, dev, &vaf); \
+ va_end(args); \
+ \
+ return r; \
+} \
+EXPORT_SYMBOL(func);
+
+define_dev_printk_level(dev_emerg, KERN_EMERG);
+define_dev_printk_level(dev_alert, KERN_ALERT);
+define_dev_printk_level(dev_crit, KERN_CRIT);
+define_dev_printk_level(dev_err, KERN_ERR);
+define_dev_printk_level(dev_warn, KERN_WARNING);
+define_dev_printk_level(dev_notice, KERN_NOTICE);
+define_dev_printk_level(_dev_info, KERN_INFO);
+
+#endif
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 7036e8e..251acea 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -10,6 +10,7 @@
#include <linux/topology.h>
#include <linux/device.h>
#include <linux/node.h>
+#include <linux/gfp.h>
#include "base.h"
@@ -79,24 +80,24 @@ void unregister_cpu(struct cpu *cpu)
}
#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
-static ssize_t cpu_probe_store(struct sys_device *dev,
- struct sysdev_attribute *attr,
- const char *buf,
+static ssize_t cpu_probe_store(struct sysdev_class *class,
+ struct sysdev_class_attribute *attr,
+ const char *buf,
size_t count)
{
return arch_cpu_probe(buf, count);
}
-static ssize_t cpu_release_store(struct sys_device *dev,
- struct sysdev_attribute *attr,
- const char *buf,
+static ssize_t cpu_release_store(struct sysdev_class *class,
+ struct sysdev_class_attribute *attr,
+ const char *buf,
size_t count)
{
return arch_cpu_release(buf, count);
}
-static SYSDEV_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
-static SYSDEV_ATTR(release, S_IWUSR, NULL, cpu_release_store);
+static SYSDEV_CLASS_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
+static SYSDEV_CLASS_ATTR(release, S_IWUSR, NULL, cpu_release_store);
#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
#else /* ... !CONFIG_HOTPLUG_CPU */
@@ -185,7 +186,7 @@ static ssize_t print_cpus_offline(struct sysdev_class *class,
/* display offline cpus < nr_cpu_ids */
if (!alloc_cpumask_var(&offline, GFP_KERNEL))
return -ENOMEM;
- cpumask_complement(offline, cpu_online_mask);
+ cpumask_andnot(offline, cpu_possible_mask, cpu_online_mask);
n = cpulist_scnprintf(buf, len, offline);
free_cpumask_var(offline);
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index c89291f..503c262 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -40,11 +40,11 @@ static void driver_bound(struct device *dev)
pr_debug("driver: '%s': %s: bound to device '%s'\n", dev_name(dev),
__func__, dev->driver->name);
+ klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices);
+
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_BOUND_DRIVER, dev);
-
- klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices);
}
static int driver_sysfs_add(struct device *dev)
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 05dd307..cf7a0c7 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -9,6 +9,7 @@
#include <linux/device.h>
#include <linux/module.h>
+#include <linux/slab.h>
#include "base.h"
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index dac478c..af06001 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -20,9 +20,11 @@
#include <linux/namei.h>
#include <linux/fs.h>
#include <linux/shmem_fs.h>
+#include <linux/ramfs.h>
#include <linux/cred.h>
#include <linux/sched.h>
#include <linux/init_task.h>
+#include <linux/slab.h>
static struct vfsmount *dev_mnt;
@@ -44,7 +46,11 @@ __setup("devtmpfs.mount=", mount_param);
static int dev_get_sb(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data, struct vfsmount *mnt)
{
+#ifdef CONFIG_TMPFS
return get_sb_single(fs_type, flags, data, shmem_fill_super, mnt);
+#else
+ return get_sb_single(fs_type, flags, data, ramfs_fill_super, mnt);
+#endif
}
static struct file_system_type dev_fs_type = {
diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c
index 962a3b5..d4d8ce5 100644
--- a/drivers/base/dma-coherent.c
+++ b/drivers/base/dma-coherent.c
@@ -2,6 +2,7 @@
* Coherent per-device memory handling.
* Borrowed from i386
*/
+#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c
index ca9186f..763d59c 100644
--- a/drivers/base/dma-mapping.c
+++ b/drivers/base/dma-mapping.c
@@ -8,6 +8,7 @@
*/
#include <linux/dma-mapping.h>
+#include <linux/gfp.h>
/*
* Managed DMA API
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 90c9fff..b631f7c 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -13,6 +13,7 @@
#include <linux/device.h>
#include <linux/module.h>
#include <linux/errno.h>
+#include <linux/slab.h>
#include <linux/string.h>
#include "base.h"
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index d0dc26a..3f093b0 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -19,6 +19,7 @@
#include <linux/kthread.h>
#include <linux/highmem.h>
#include <linux/firmware.h>
+#include <linux/slab.h>
#define to_dev(obj) container_of(obj, struct device, kobj)
@@ -26,6 +27,52 @@ MODULE_AUTHOR("Manuel Estrada Sainz");
MODULE_DESCRIPTION("Multi purpose firmware loading support");
MODULE_LICENSE("GPL");
+/* Builtin firmware support */
+
+#ifdef CONFIG_FW_LOADER
+
+extern struct builtin_fw __start_builtin_fw[];
+extern struct builtin_fw __end_builtin_fw[];
+
+static bool fw_get_builtin_firmware(struct firmware *fw, const char *name)
+{
+ struct builtin_fw *b_fw;
+
+ for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++) {
+ if (strcmp(name, b_fw->name) == 0) {
+ fw->size = b_fw->size;
+ fw->data = b_fw->data;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static bool fw_is_builtin_firmware(const struct firmware *fw)
+{
+ struct builtin_fw *b_fw;
+
+ for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++)
+ if (fw->data == b_fw->data)
+ return true;
+
+ return false;
+}
+
+#else /* Module case - no builtin firmware support */
+
+static inline bool fw_get_builtin_firmware(struct firmware *fw, const char *name)
+{
+ return false;
+}
+
+static inline bool fw_is_builtin_firmware(const struct firmware *fw)
+{
+ return false;
+}
+#endif
+
enum {
FW_STATUS_LOADING,
FW_STATUS_DONE,
@@ -39,7 +86,6 @@ static int loading_timeout = 60; /* In seconds */
static DEFINE_MUTEX(fw_lock);
struct firmware_priv {
- char *fw_id;
struct completion completion;
struct bin_attribute attr_data;
struct firmware *fw;
@@ -47,18 +93,11 @@ struct firmware_priv {
struct page **pages;
int nr_pages;
int page_array_size;
- const char *vdata;
struct timer_list timeout;
+ bool nowait;
+ char fw_id[];
};
-#ifdef CONFIG_FW_LOADER
-extern struct builtin_fw __start_builtin_fw[];
-extern struct builtin_fw __end_builtin_fw[];
-#else /* Module case. Avoid ifdefs later; it'll all optimise out */
-static struct builtin_fw *__start_builtin_fw;
-static struct builtin_fw *__end_builtin_fw;
-#endif
-
static void
fw_load_abort(struct firmware_priv *fw_priv)
{
@@ -78,6 +117,7 @@ firmware_timeout_show(struct class *class,
/**
* firmware_timeout_store - set number of seconds to wait for firmware
* @class: device class pointer
+ * @attr: device attribute pointer
* @buf: buffer to scan for timeout value
* @count: number of bytes in @buf
*
@@ -98,9 +138,25 @@ firmware_timeout_store(struct class *class,
return count;
}
-static CLASS_ATTR(timeout, 0644, firmware_timeout_show, firmware_timeout_store);
+static struct class_attribute firmware_class_attrs[] = {
+ __ATTR(timeout, S_IWUSR | S_IRUGO,
+ firmware_timeout_show, firmware_timeout_store),
+ __ATTR_NULL
+};
-static void fw_dev_release(struct device *dev);
+static void fw_dev_release(struct device *dev)
+{
+ struct firmware_priv *fw_priv = dev_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < fw_priv->nr_pages; i++)
+ __free_page(fw_priv->pages[i]);
+ kfree(fw_priv->pages);
+ kfree(fw_priv);
+ kfree(dev);
+
+ module_put(THIS_MODULE);
+}
static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env)
{
@@ -110,12 +166,15 @@ static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env)
return -ENOMEM;
if (add_uevent_var(env, "TIMEOUT=%i", loading_timeout))
return -ENOMEM;
+ if (add_uevent_var(env, "ASYNC=%d", fw_priv->nowait))
+ return -ENOMEM;
return 0;
}
static struct class firmware_class = {
.name = "firmware",
+ .class_attrs = firmware_class_attrs,
.dev_uevent = firmware_uevent,
.dev_release = fw_dev_release,
};
@@ -128,6 +187,17 @@ static ssize_t firmware_loading_show(struct device *dev,
return sprintf(buf, "%d\n", loading);
}
+static void firmware_free_data(const struct firmware *fw)
+{
+ int i;
+ vunmap(fw->data);
+ if (fw->pages) {
+ for (i = 0; i < PFN_UP(fw->size); i++)
+ __free_page(fw->pages[i]);
+ kfree(fw->pages);
+ }
+}
+
/* Some architectures don't have PAGE_KERNEL_RO */
#ifndef PAGE_KERNEL_RO
#define PAGE_KERNEL_RO PAGE_KERNEL
@@ -160,21 +230,21 @@ static ssize_t firmware_loading_store(struct device *dev,
mutex_unlock(&fw_lock);
break;
}
- vfree(fw_priv->fw->data);
- fw_priv->fw->data = NULL;
+ firmware_free_data(fw_priv->fw);
+ memset(fw_priv->fw, 0, sizeof(struct firmware));
+ /* If the pages are not owned by 'struct firmware' */
for (i = 0; i < fw_priv->nr_pages; i++)
__free_page(fw_priv->pages[i]);
kfree(fw_priv->pages);
fw_priv->pages = NULL;
fw_priv->page_array_size = 0;
fw_priv->nr_pages = 0;
- fw_priv->fw->size = 0;
set_bit(FW_STATUS_LOADING, &fw_priv->status);
mutex_unlock(&fw_lock);
break;
case 0:
if (test_bit(FW_STATUS_LOADING, &fw_priv->status)) {
- vfree(fw_priv->fw->data);
+ vunmap(fw_priv->fw->data);
fw_priv->fw->data = vmap(fw_priv->pages,
fw_priv->nr_pages,
0, PAGE_KERNEL_RO);
@@ -182,7 +252,10 @@ static ssize_t firmware_loading_store(struct device *dev,
dev_err(dev, "%s: vmap() failed\n", __func__);
goto err;
}
- /* Pages will be freed by vfree() */
+ /* Pages are now owned by 'struct firmware' */
+ fw_priv->fw->pages = fw_priv->pages;
+ fw_priv->pages = NULL;
+
fw_priv->page_array_size = 0;
fw_priv->nr_pages = 0;
complete(&fw_priv->completion);
@@ -205,8 +278,9 @@ static ssize_t firmware_loading_store(struct device *dev,
static DEVICE_ATTR(loading, 0644, firmware_loading_show, firmware_loading_store);
static ssize_t
-firmware_data_read(struct kobject *kobj, struct bin_attribute *bin_attr,
- char *buffer, loff_t offset, size_t count)
+firmware_data_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buffer, loff_t offset,
+ size_t count)
{
struct device *dev = to_dev(kobj);
struct firmware_priv *fw_priv = dev_get_drvdata(dev);
@@ -289,6 +363,7 @@ fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
/**
* firmware_data_write - write method for firmware
+ * @filp: open sysfs file
* @kobj: kobject for the device
* @bin_attr: bin_attr structure
* @buffer: buffer being written
@@ -299,8 +374,9 @@ fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
* the driver as a firmware image.
**/
static ssize_t
-firmware_data_write(struct kobject *kobj, struct bin_attribute *bin_attr,
- char *buffer, loff_t offset, size_t count)
+firmware_data_write(struct file* filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buffer,
+ loff_t offset, size_t count)
{
struct device *dev = to_dev(kobj);
struct firmware_priv *fw_priv = dev_get_drvdata(dev);
@@ -351,21 +427,6 @@ static struct bin_attribute firmware_attr_data_tmpl = {
.write = firmware_data_write,
};
-static void fw_dev_release(struct device *dev)
-{
- struct firmware_priv *fw_priv = dev_get_drvdata(dev);
- int i;
-
- for (i = 0; i < fw_priv->nr_pages; i++)
- __free_page(fw_priv->pages[i]);
- kfree(fw_priv->pages);
- kfree(fw_priv->fw_id);
- kfree(fw_priv);
- kfree(dev);
-
- module_put(THIS_MODULE);
-}
-
static void
firmware_class_timeout(u_long data)
{
@@ -377,8 +438,8 @@ static int fw_register_device(struct device **dev_p, const char *fw_name,
struct device *device)
{
int retval;
- struct firmware_priv *fw_priv = kzalloc(sizeof(*fw_priv),
- GFP_KERNEL);
+ struct firmware_priv *fw_priv =
+ kzalloc(sizeof(*fw_priv) + strlen(fw_name) + 1 , GFP_KERNEL);
struct device *f_dev = kzalloc(sizeof(*f_dev), GFP_KERNEL);
*dev_p = NULL;
@@ -389,16 +450,9 @@ static int fw_register_device(struct device **dev_p, const char *fw_name,
goto error_kfree;
}
+ strcpy(fw_priv->fw_id, fw_name);
init_completion(&fw_priv->completion);
fw_priv->attr_data = firmware_attr_data_tmpl;
- fw_priv->fw_id = kstrdup(fw_name, GFP_KERNEL);
- if (!fw_priv->fw_id) {
- dev_err(device, "%s: Firmware name allocation failed\n",
- __func__);
- retval = -ENOMEM;
- goto error_kfree;
- }
-
fw_priv->timeout.function = firmware_class_timeout;
fw_priv->timeout.data = (u_long) fw_priv;
init_timer(&fw_priv->timeout);
@@ -425,7 +479,7 @@ error_kfree:
static int fw_setup_device(struct firmware *fw, struct device **dev_p,
const char *fw_name, struct device *device,
- int uevent)
+ int uevent, bool nowait)
{
struct device *f_dev;
struct firmware_priv *fw_priv;
@@ -441,7 +495,10 @@ static int fw_setup_device(struct firmware *fw, struct device **dev_p,
fw_priv = dev_get_drvdata(f_dev);
+ fw_priv->nowait = nowait;
+
fw_priv->fw = fw;
+ sysfs_bin_attr_init(&fw_priv->attr_data);
retval = sysfs_create_bin_file(&f_dev->kobj, &fw_priv->attr_data);
if (retval) {
dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__);
@@ -467,12 +524,11 @@ out:
static int
_request_firmware(const struct firmware **firmware_p, const char *name,
- struct device *device, int uevent)
+ struct device *device, int uevent, bool nowait)
{
struct device *f_dev;
struct firmware_priv *fw_priv;
struct firmware *firmware;
- struct builtin_fw *builtin;
int retval;
if (!firmware_p)
@@ -486,21 +542,16 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
goto out;
}
- for (builtin = __start_builtin_fw; builtin != __end_builtin_fw;
- builtin++) {
- if (strcmp(name, builtin->name))
- continue;
- dev_info(device, "firmware: using built-in firmware %s\n",
- name);
- firmware->size = builtin->size;
- firmware->data = builtin->data;
+ if (fw_get_builtin_firmware(firmware, name)) {
+ dev_dbg(device, "firmware: using built-in firmware %s\n", name);
return 0;
}
if (uevent)
- dev_info(device, "firmware: requesting %s\n", name);
+ dev_dbg(device, "firmware: requesting %s\n", name);
- retval = fw_setup_device(firmware, &f_dev, name, device, uevent);
+ retval = fw_setup_device(firmware, &f_dev, name, device,
+ uevent, nowait);
if (retval)
goto error_kfree_fw;
@@ -557,26 +608,18 @@ request_firmware(const struct firmware **firmware_p, const char *name,
struct device *device)
{
int uevent = 1;
- return _request_firmware(firmware_p, name, device, uevent);
+ return _request_firmware(firmware_p, name, device, uevent, false);
}
/**
* release_firmware: - release the resource associated with a firmware image
* @fw: firmware resource to release
**/
-void
-release_firmware(const struct firmware *fw)
+void release_firmware(const struct firmware *fw)
{
- struct builtin_fw *builtin;
-
if (fw) {
- for (builtin = __start_builtin_fw; builtin != __end_builtin_fw;
- builtin++) {
- if (fw->data == builtin->data)
- goto free_fw;
- }
- vfree(fw->data);
- free_fw:
+ if (!fw_is_builtin_firmware(fw))
+ firmware_free_data(fw);
kfree(fw);
}
}
@@ -603,7 +646,7 @@ request_firmware_work_func(void *arg)
return 0;
}
ret = _request_firmware(&fw, fw_work->name, fw_work->device,
- fw_work->uevent);
+ fw_work->uevent, true);
fw_work->cont(fw, fw_work->context);
@@ -667,26 +710,12 @@ request_firmware_nowait(
return 0;
}
-static int __init
-firmware_class_init(void)
+static int __init firmware_class_init(void)
{
- int error;
- error = class_register(&firmware_class);
- if (error) {
- printk(KERN_ERR "%s: class_register failed\n", __func__);
- return error;
- }
- error = class_create_file(&firmware_class, &class_attr_timeout);
- if (error) {
- printk(KERN_ERR "%s: class_create_file failed\n",
- __func__);
- class_unregister(&firmware_class);
- }
- return error;
-
+ return class_register(&firmware_class);
}
-static void __exit
-firmware_class_exit(void)
+
+static void __exit firmware_class_exit(void)
{
class_unregister(&firmware_class);
}
diff --git a/drivers/base/iommu.c b/drivers/base/iommu.c
index 8ad4ffe..6e6b6a1 100644
--- a/drivers/base/iommu.c
+++ b/drivers/base/iommu.c
@@ -80,20 +80,6 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev)
}
EXPORT_SYMBOL_GPL(iommu_detach_device);
-int iommu_map_range(struct iommu_domain *domain, unsigned long iova,
- phys_addr_t paddr, size_t size, int prot)
-{
- return iommu_ops->map(domain, iova, paddr, size, prot);
-}
-EXPORT_SYMBOL_GPL(iommu_map_range);
-
-void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova,
- size_t size)
-{
- iommu_ops->unmap(domain, iova, size);
-}
-EXPORT_SYMBOL_GPL(iommu_unmap_range);
-
phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
unsigned long iova)
{
@@ -107,3 +93,32 @@ int iommu_domain_has_cap(struct iommu_domain *domain,
return iommu_ops->domain_has_cap(domain, cap);
}
EXPORT_SYMBOL_GPL(iommu_domain_has_cap);
+
+int iommu_map(struct iommu_domain *domain, unsigned long iova,
+ phys_addr_t paddr, int gfp_order, int prot)
+{
+ unsigned long invalid_mask;
+ size_t size;
+
+ size = 0x1000UL << gfp_order;
+ invalid_mask = size - 1;
+
+ BUG_ON((iova | paddr) & invalid_mask);
+
+ return iommu_ops->map(domain, iova, paddr, gfp_order, prot);
+}
+EXPORT_SYMBOL_GPL(iommu_map);
+
+int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order)
+{
+ unsigned long invalid_mask;
+ size_t size;
+
+ size = 0x1000UL << gfp_order;
+ invalid_mask = size - 1;
+
+ BUG_ON(iova & invalid_mask);
+
+ return iommu_ops->unmap(domain, iova, gfp_order);
+}
+EXPORT_SYMBOL_GPL(iommu_unmap);
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index db0848e..933442f 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -22,6 +22,7 @@
#include <linux/mm.h>
#include <linux/mutex.h>
#include <linux/stat.h>
+#include <linux/slab.h>
#include <asm/atomic.h>
#include <asm/uaccess.h>
@@ -312,7 +313,7 @@ static ssize_t
print_block_size(struct sysdev_class *class, struct sysdev_class_attribute *attr,
char *buf)
{
- return sprintf(buf, "%#lx\n", (unsigned long)PAGES_PER_SECTION * PAGE_SIZE);
+ return sprintf(buf, "%lx\n", (unsigned long)PAGES_PER_SECTION * PAGE_SIZE);
}
static SYSDEV_CLASS_ATTR(block_size_bytes, 0444, print_block_size, NULL);
diff --git a/drivers/base/module.c b/drivers/base/module.c
index 103be9c..db930d3 100644
--- a/drivers/base/module.c
+++ b/drivers/base/module.c
@@ -7,6 +7,7 @@
#include <linux/device.h>
#include <linux/module.h>
#include <linux/errno.h>
+#include <linux/slab.h>
#include <linux/string.h>
#include "base.h"
@@ -14,12 +15,10 @@ static char *make_driver_name(struct device_driver *drv)
{
char *driver_name;
- driver_name = kmalloc(strlen(drv->name) + strlen(drv->bus->name) + 2,
- GFP_KERNEL);
+ driver_name = kasprintf(GFP_KERNEL, "%s:%s", drv->bus->name, drv->name);
if (!driver_name)
return NULL;
- sprintf(driver_name, "%s:%s", drv->bus->name, drv->name);
return driver_name;
}
diff --git a/drivers/base/node.c b/drivers/base/node.c
index ad43185..2bdd8a9 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -9,12 +9,14 @@
#include <linux/memory.h>
#include <linux/node.h>
#include <linux/hugetlb.h>
+#include <linux/compaction.h>
#include <linux/cpumask.h>
#include <linux/topology.h>
#include <linux/nodemask.h>
#include <linux/cpu.h>
#include <linux/device.h>
#include <linux/swap.h>
+#include <linux/slab.h>
static struct sysdev_class_attribute *node_state_attrs[];
@@ -165,8 +167,11 @@ static ssize_t node_read_distance(struct sys_device * dev,
int len = 0;
int i;
- /* buf currently PAGE_SIZE, need ~4 chars per node */
- BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2);
+ /*
+ * buf is currently PAGE_SIZE in length and each node needs 4 chars
+ * at the most (distance + space or newline).
+ */
+ BUILD_BUG_ON(MAX_NUMNODES * 4 > PAGE_SIZE);
for_each_online_node(i)
len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
@@ -242,6 +247,8 @@ int register_node(struct node *node, int num, struct node *parent)
scan_unevictable_register_node(node);
hugetlb_register_node(node);
+
+ compaction_register_node(node);
}
return error;
}
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 1ba9d617..4d99c8b 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -187,7 +187,7 @@ EXPORT_SYMBOL_GPL(platform_device_alloc);
* released.
*/
int platform_device_add_resources(struct platform_device *pdev,
- struct resource *res, unsigned int num)
+ const struct resource *res, unsigned int num)
{
struct resource *r;
@@ -362,10 +362,12 @@ EXPORT_SYMBOL_GPL(platform_device_unregister);
* enumeration tasks, they don't fully conform to the Linux driver model.
* In particular, when such drivers are built as modules, they can't be
* "hotplugged".
+ *
+ * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
*/
struct platform_device *platform_device_register_simple(const char *name,
int id,
- struct resource *res,
+ const struct resource *res,
unsigned int num)
{
struct platform_device *pdev;
@@ -408,6 +410,8 @@ EXPORT_SYMBOL_GPL(platform_device_register_simple);
* allocated for the device allows drivers using such devices to be
* unloaded without waiting for the last reference to the device to be
* dropped.
+ *
+ * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
*/
struct platform_device *platform_device_register_data(
struct device *parent,
@@ -559,6 +563,8 @@ EXPORT_SYMBOL_GPL(platform_driver_probe);
*
* Use this in legacy-style modules that probe hardware directly and
* register a single platform device and corresponding platform driver.
+ *
+ * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
*/
struct platform_device * __init_or_module platform_create_bundle(
struct platform_driver *driver,
@@ -729,7 +735,7 @@ static void platform_pm_complete(struct device *dev)
#ifdef CONFIG_SUSPEND
-static int platform_pm_suspend(struct device *dev)
+int __weak platform_pm_suspend(struct device *dev)
{
struct device_driver *drv = dev->driver;
int ret = 0;
@@ -747,7 +753,7 @@ static int platform_pm_suspend(struct device *dev)
return ret;
}
-static int platform_pm_suspend_noirq(struct device *dev)
+int __weak platform_pm_suspend_noirq(struct device *dev)
{
struct device_driver *drv = dev->driver;
int ret = 0;
@@ -763,7 +769,7 @@ static int platform_pm_suspend_noirq(struct device *dev)
return ret;
}
-static int platform_pm_resume(struct device *dev)
+int __weak platform_pm_resume(struct device *dev)
{
struct device_driver *drv = dev->driver;
int ret = 0;
@@ -781,7 +787,7 @@ static int platform_pm_resume(struct device *dev)
return ret;
}
-static int platform_pm_resume_noirq(struct device *dev)
+int __weak platform_pm_resume_noirq(struct device *dev)
{
struct device_driver *drv = dev->driver;
int ret = 0;
@@ -961,17 +967,17 @@ static int platform_pm_restore_noirq(struct device *dev)
int __weak platform_pm_runtime_suspend(struct device *dev)
{
- return -ENOSYS;
+ return pm_generic_runtime_suspend(dev);
};
int __weak platform_pm_runtime_resume(struct device *dev)
{
- return -ENOSYS;
+ return pm_generic_runtime_resume(dev);
};
int __weak platform_pm_runtime_idle(struct device *dev)
{
- return -ENOSYS;
+ return pm_generic_runtime_idle(dev);
};
#else /* !CONFIG_PM_RUNTIME */
@@ -1052,9 +1058,11 @@ static __initdata LIST_HEAD(early_platform_driver_list);
static __initdata LIST_HEAD(early_platform_device_list);
/**
- * early_platform_driver_register
+ * early_platform_driver_register - register early platform driver
* @epdrv: early_platform driver structure
* @buf: string passed from early_param()
+ *
+ * Helper function for early_platform_init() / early_platform_init_buffer()
*/
int __init early_platform_driver_register(struct early_platform_driver *epdrv,
char *buf)
@@ -1106,9 +1114,12 @@ int __init early_platform_driver_register(struct early_platform_driver *epdrv,
}
/**
- * early_platform_add_devices - add a numbers of early platform devices
+ * early_platform_add_devices - adds a number of early platform devices
* @devs: array of early platform devices to add
* @num: number of early platform devices in array
+ *
+ * Used by early architecture code to register early platform devices and
+ * their platform data.
*/
void __init early_platform_add_devices(struct platform_device **devs, int num)
{
@@ -1128,8 +1139,12 @@ void __init early_platform_add_devices(struct platform_device **devs, int num)
}
/**
- * early_platform_driver_register_all
+ * early_platform_driver_register_all - register early platform drivers
* @class_str: string to identify early platform driver class
+ *
+ * Used by architecture code to register all early platform drivers
+ * for a certain class. If omitted then only early platform drivers
+ * with matching kernel command line class parameters will be registered.
*/
void __init early_platform_driver_register_all(char *class_str)
{
@@ -1151,7 +1166,7 @@ void __init early_platform_driver_register_all(char *class_str)
}
/**
- * early_platform_match
+ * early_platform_match - find early platform device matching driver
* @epdrv: early platform driver structure
* @id: id to match against
*/
@@ -1169,7 +1184,7 @@ early_platform_match(struct early_platform_driver *epdrv, int id)
}
/**
- * early_platform_left
+ * early_platform_left - check if early platform driver has matching devices
* @epdrv: early platform driver structure
* @id: return true if id or above exists
*/
@@ -1187,7 +1202,7 @@ static __init int early_platform_left(struct early_platform_driver *epdrv,
}
/**
- * early_platform_driver_probe_id
+ * early_platform_driver_probe_id - probe drivers matching class_str and id
* @class_str: string to identify early platform driver class
* @id: id to match against
* @nr_probe: number of platform devices to successfully probe before exiting
@@ -1239,6 +1254,26 @@ static int __init early_platform_driver_probe_id(char *class_str,
}
if (match) {
+ /*
+ * Set up a sensible init_name to enable
+ * dev_name() and others to be used before the
+ * rest of the driver core is initialized.
+ */
+ if (!match->dev.init_name && slab_is_available()) {
+ if (match->id != -1)
+ match->dev.init_name =
+ kasprintf(GFP_KERNEL, "%s.%d",
+ match->name,
+ match->id);
+ else
+ match->dev.init_name =
+ kasprintf(GFP_KERNEL, "%s",
+ match->name);
+
+ if (!match->dev.init_name)
+ return -ENOMEM;
+ }
+
if (epdrv->pdrv->probe(match))
pr_warning("%s: unable to probe %s early.\n",
class_str, match->name);
@@ -1257,10 +1292,14 @@ static int __init early_platform_driver_probe_id(char *class_str,
}
/**
- * early_platform_driver_probe
+ * early_platform_driver_probe - probe a class of registered drivers
* @class_str: string to identify early platform driver class
* @nr_probe: number of platform devices to successfully probe before exiting
* @user_only: only probe user specified early platform devices
+ *
+ * Used by architecture code to probe registered early platform drivers
+ * within a certain class. For probe to happen a registered early platform
+ * device matching a registered early platform driver is needed.
*/
int __init early_platform_driver_probe(char *class_str,
int nr_probe,
diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile
index 89de753..cbccf9a 100644
--- a/drivers/base/power/Makefile
+++ b/drivers/base/power/Makefile
@@ -1,5 +1,5 @@
obj-$(CONFIG_PM) += sysfs.o
-obj-$(CONFIG_PM_SLEEP) += main.o
+obj-$(CONFIG_PM_SLEEP) += main.o wakeup.o
obj-$(CONFIG_PM_RUNTIME) += runtime.o
obj-$(CONFIG_PM_OPS) += generic_ops.o
obj-$(CONFIG_PM_TRACE_RTC) += trace.o
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index d477f4d..5419a49 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -59,6 +59,7 @@ void device_pm_init(struct device *dev)
{
dev->power.status = DPM_ON;
init_completion(&dev->power.completion);
+ dev->power.wakeup_count = 0;
pm_runtime_init(dev);
}
@@ -439,8 +440,23 @@ static int device_resume_noirq(struct device *dev, pm_message_t state)
if (dev->bus && dev->bus->pm) {
pm_dev_dbg(dev, state, "EARLY ");
error = pm_noirq_op(dev, dev->bus->pm, state);
+ if (error)
+ goto End;
}
+ if (dev->type && dev->type->pm) {
+ pm_dev_dbg(dev, state, "EARLY type ");
+ error = pm_noirq_op(dev, dev->type->pm, state);
+ if (error)
+ goto End;
+ }
+
+ if (dev->class && dev->class->pm) {
+ pm_dev_dbg(dev, state, "EARLY class ");
+ error = pm_noirq_op(dev, dev->class->pm, state);
+ }
+
+End:
TRACE_RESUME(error);
return error;
}
@@ -735,10 +751,26 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state)
{
int error = 0;
+ if (dev->class && dev->class->pm) {
+ pm_dev_dbg(dev, state, "LATE class ");
+ error = pm_noirq_op(dev, dev->class->pm, state);
+ if (error)
+ goto End;
+ }
+
+ if (dev->type && dev->type->pm) {
+ pm_dev_dbg(dev, state, "LATE type ");
+ error = pm_noirq_op(dev, dev->type->pm, state);
+ if (error)
+ goto End;
+ }
+
if (dev->bus && dev->bus->pm) {
pm_dev_dbg(dev, state, "LATE ");
error = pm_noirq_op(dev, dev->bus->pm, state);
}
+
+End:
return error;
}
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 626dd14..b78c401 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -123,6 +123,45 @@ int pm_runtime_idle(struct device *dev)
}
EXPORT_SYMBOL_GPL(pm_runtime_idle);
+
+/**
+ * update_pm_runtime_accounting - Update the time accounting of power states
+ * @dev: Device to update the accounting for
+ *
+ * In order to be able to have time accounting of the various power states
+ * (as used by programs such as PowerTOP to show the effectiveness of runtime
+ * PM), we need to track the time spent in each state.
+ * update_pm_runtime_accounting must be called each time before the
+ * runtime_status field is updated, to account the time in the old state
+ * correctly.
+ */
+void update_pm_runtime_accounting(struct device *dev)
+{
+ unsigned long now = jiffies;
+ int delta;
+
+ delta = now - dev->power.accounting_timestamp;
+
+ if (delta < 0)
+ delta = 0;
+
+ dev->power.accounting_timestamp = now;
+
+ if (dev->power.disable_depth > 0)
+ return;
+
+ if (dev->power.runtime_status == RPM_SUSPENDED)
+ dev->power.suspended_jiffies += delta;
+ else
+ dev->power.active_jiffies += delta;
+}
+
+static void __update_runtime_status(struct device *dev, enum rpm_status status)
+{
+ update_pm_runtime_accounting(dev);
+ dev->power.runtime_status = status;
+}
+
/**
* __pm_runtime_suspend - Carry out run-time suspend of given device.
* @dev: Device to suspend.
@@ -197,7 +236,7 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
goto repeat;
}
- dev->power.runtime_status = RPM_SUSPENDING;
+ __update_runtime_status(dev, RPM_SUSPENDING);
dev->power.deferred_resume = false;
if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_suspend) {
@@ -228,15 +267,17 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
}
if (retval) {
- dev->power.runtime_status = RPM_ACTIVE;
- pm_runtime_cancel_pending(dev);
-
+ __update_runtime_status(dev, RPM_ACTIVE);
if (retval == -EAGAIN || retval == -EBUSY) {
- notify = true;
+ if (dev->power.timer_expires == 0)
+ notify = true;
dev->power.runtime_error = 0;
+ } else {
+ pm_runtime_cancel_pending(dev);
}
} else {
- dev->power.runtime_status = RPM_SUSPENDED;
+ __update_runtime_status(dev, RPM_SUSPENDED);
+ pm_runtime_deactivate_timer(dev);
if (dev->parent) {
parent = dev->parent;
@@ -379,7 +420,7 @@ int __pm_runtime_resume(struct device *dev, bool from_wq)
goto repeat;
}
- dev->power.runtime_status = RPM_RESUMING;
+ __update_runtime_status(dev, RPM_RESUMING);
if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_resume) {
spin_unlock_irq(&dev->power.lock);
@@ -409,10 +450,10 @@ int __pm_runtime_resume(struct device *dev, bool from_wq)
}
if (retval) {
- dev->power.runtime_status = RPM_SUSPENDED;
+ __update_runtime_status(dev, RPM_SUSPENDED);
pm_runtime_cancel_pending(dev);
} else {
- dev->power.runtime_status = RPM_ACTIVE;
+ __update_runtime_status(dev, RPM_ACTIVE);
if (parent)
atomic_inc(&parent->power.child_count);
}
@@ -659,8 +700,6 @@ int pm_schedule_suspend(struct device *dev, unsigned int delay)
if (dev->power.runtime_status == RPM_SUSPENDED)
retval = 1;
- else if (dev->power.runtime_status == RPM_SUSPENDING)
- retval = -EINPROGRESS;
else if (atomic_read(&dev->power.usage_count) > 0
|| dev->power.disable_depth > 0)
retval = -EAGAIN;
@@ -848,7 +887,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
}
out_set:
- dev->power.runtime_status = status;
+ __update_runtime_status(dev, status);
dev->power.runtime_error = 0;
out:
spin_unlock_irqrestore(&dev->power.lock, flags);
@@ -1077,6 +1116,7 @@ void pm_runtime_init(struct device *dev)
dev->power.request_pending = false;
dev->power.request = RPM_REQ_NONE;
dev->power.deferred_resume = false;
+ dev->power.accounting_timestamp = jiffies;
INIT_WORK(&dev->power.work, pm_runtime_work);
dev->power.timer_expires = 0;
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index 86fd937..e56b438 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -5,6 +5,8 @@
#include <linux/device.h>
#include <linux/string.h>
#include <linux/pm_runtime.h>
+#include <asm/atomic.h>
+#include <linux/jiffies.h>
#include "power.h"
/*
@@ -72,6 +74,8 @@
* device are known to the PM core. However, for some devices this
* attribute is set to "enabled" by bus type code or device drivers and in
* that cases it should be safe to leave the default value.
+ *
+ * wakeup_count - Report the number of wakeup events related to the device
*/
static const char enabled[] = "enabled";
@@ -107,6 +111,65 @@ static ssize_t control_store(struct device * dev, struct device_attribute *attr,
}
static DEVICE_ATTR(control, 0644, control_show, control_store);
+
+static ssize_t rtpm_active_time_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int ret;
+ spin_lock_irq(&dev->power.lock);
+ update_pm_runtime_accounting(dev);
+ ret = sprintf(buf, "%i\n", jiffies_to_msecs(dev->power.active_jiffies));
+ spin_unlock_irq(&dev->power.lock);
+ return ret;
+}
+
+static DEVICE_ATTR(runtime_active_time, 0444, rtpm_active_time_show, NULL);
+
+static ssize_t rtpm_suspended_time_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int ret;
+ spin_lock_irq(&dev->power.lock);
+ update_pm_runtime_accounting(dev);
+ ret = sprintf(buf, "%i\n",
+ jiffies_to_msecs(dev->power.suspended_jiffies));
+ spin_unlock_irq(&dev->power.lock);
+ return ret;
+}
+
+static DEVICE_ATTR(runtime_suspended_time, 0444, rtpm_suspended_time_show, NULL);
+
+static ssize_t rtpm_status_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const char *p;
+
+ if (dev->power.runtime_error) {
+ p = "error\n";
+ } else if (dev->power.disable_depth) {
+ p = "unsupported\n";
+ } else {
+ switch (dev->power.runtime_status) {
+ case RPM_SUSPENDED:
+ p = "suspended\n";
+ break;
+ case RPM_SUSPENDING:
+ p = "suspending\n";
+ break;
+ case RPM_RESUMING:
+ p = "resuming\n";
+ break;
+ case RPM_ACTIVE:
+ p = "active\n";
+ break;
+ default:
+ return -EIO;
+ }
+ }
+ return sprintf(buf, p);
+}
+
+static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL);
#endif
static ssize_t
@@ -143,7 +206,50 @@ wake_store(struct device * dev, struct device_attribute *attr,
static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store);
-#ifdef CONFIG_PM_SLEEP_ADVANCED_DEBUG
+#ifdef CONFIG_PM_SLEEP
+static ssize_t wakeup_count_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%lu\n", dev->power.wakeup_count);
+}
+
+static DEVICE_ATTR(wakeup_count, 0444, wakeup_count_show, NULL);
+#endif
+
+#ifdef CONFIG_PM_ADVANCED_DEBUG
+#ifdef CONFIG_PM_RUNTIME
+
+static ssize_t rtpm_usagecount_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", atomic_read(&dev->power.usage_count));
+}
+
+static ssize_t rtpm_children_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", dev->power.ignore_children ?
+ 0 : atomic_read(&dev->power.child_count));
+}
+
+static ssize_t rtpm_enabled_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ if ((dev->power.disable_depth) && (dev->power.runtime_auto == false))
+ return sprintf(buf, "disabled & forbidden\n");
+ else if (dev->power.disable_depth)
+ return sprintf(buf, "disabled\n");
+ else if (dev->power.runtime_auto == false)
+ return sprintf(buf, "forbidden\n");
+ return sprintf(buf, "enabled\n");
+}
+
+static DEVICE_ATTR(runtime_usage, 0444, rtpm_usagecount_show, NULL);
+static DEVICE_ATTR(runtime_active_kids, 0444, rtpm_children_show, NULL);
+static DEVICE_ATTR(runtime_enabled, 0444, rtpm_enabled_show, NULL);
+
+#endif
+
static ssize_t async_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
@@ -170,15 +276,26 @@ static ssize_t async_store(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR(async, 0644, async_show, async_store);
-#endif /* CONFIG_PM_SLEEP_ADVANCED_DEBUG */
+#endif /* CONFIG_PM_ADVANCED_DEBUG */
static struct attribute * power_attrs[] = {
#ifdef CONFIG_PM_RUNTIME
&dev_attr_control.attr,
+ &dev_attr_runtime_status.attr,
+ &dev_attr_runtime_suspended_time.attr,
+ &dev_attr_runtime_active_time.attr,
#endif
&dev_attr_wakeup.attr,
-#ifdef CONFIG_PM_SLEEP_ADVANCED_DEBUG
+#ifdef CONFIG_PM_SLEEP
+ &dev_attr_wakeup_count.attr,
+#endif
+#ifdef CONFIG_PM_ADVANCED_DEBUG
&dev_attr_async.attr,
+#ifdef CONFIG_PM_RUNTIME
+ &dev_attr_runtime_usage.attr,
+ &dev_attr_runtime_active_kids.attr,
+ &dev_attr_runtime_enabled.attr,
+#endif
#endif
NULL,
};
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
new file mode 100644
index 0000000..eb594fa
--- /dev/null
+++ b/drivers/base/power/wakeup.c
@@ -0,0 +1,247 @@
+/*
+ * drivers/base/power/wakeup.c - System wakeup events framework
+ *
+ * Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
+ *
+ * This file is released under the GPLv2.
+ */
+
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/capability.h>
+#include <linux/suspend.h>
+#include <linux/pm.h>
+
+/*
+ * If set, the suspend/hibernate code will abort transitions to a sleep state
+ * if wakeup events are registered during or immediately before the transition.
+ */
+bool events_check_enabled;
+
+/* The counter of registered wakeup events. */
+static unsigned long event_count;
+/* A preserved old value of event_count. */
+static unsigned long saved_event_count;
+/* The counter of wakeup events being processed. */
+static unsigned long events_in_progress;
+
+static DEFINE_SPINLOCK(events_lock);
+
+static void pm_wakeup_timer_fn(unsigned long data);
+
+static DEFINE_TIMER(events_timer, pm_wakeup_timer_fn, 0, 0);
+static unsigned long events_timer_expires;
+
+/*
+ * The functions below use the observation that each wakeup event starts a
+ * period in which the system should not be suspended. The moment this period
+ * will end depends on how the wakeup event is going to be processed after being
+ * detected and all of the possible cases can be divided into two distinct
+ * groups.
+ *
+ * First, a wakeup event may be detected by the same functional unit that will
+ * carry out the entire processing of it and possibly will pass it to user space
+ * for further processing. In that case the functional unit that has detected
+ * the event may later "close" the "no suspend" period associated with it
+ * directly as soon as it has been dealt with. The pair of pm_stay_awake() and
+ * pm_relax(), balanced with each other, is supposed to be used in such
+ * situations.
+ *
+ * Second, a wakeup event may be detected by one functional unit and processed
+ * by another one. In that case the unit that has detected it cannot really
+ * "close" the "no suspend" period associated with it, unless it knows in
+ * advance what's going to happen to the event during processing. This
+ * knowledge, however, may not be available to it, so it can simply specify time
+ * to wait before the system can be suspended and pass it as the second
+ * argument of pm_wakeup_event().
+ */
+
+/**
+ * pm_stay_awake - Notify the PM core that a wakeup event is being processed.
+ * @dev: Device the wakeup event is related to.
+ *
+ * Notify the PM core of a wakeup event (signaled by @dev) by incrementing the
+ * counter of wakeup events being processed. If @dev is not NULL, the counter
+ * of wakeup events related to @dev is incremented too.
+ *
+ * Call this function after detecting of a wakeup event if pm_relax() is going
+ * to be called directly after processing the event (and possibly passing it to
+ * user space for further processing).
+ *
+ * It is safe to call this function from interrupt context.
+ */
+void pm_stay_awake(struct device *dev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&events_lock, flags);
+ if (dev)
+ dev->power.wakeup_count++;
+
+ events_in_progress++;
+ spin_unlock_irqrestore(&events_lock, flags);
+}
+
+/**
+ * pm_relax - Notify the PM core that processing of a wakeup event has ended.
+ *
+ * Notify the PM core that a wakeup event has been processed by decrementing
+ * the counter of wakeup events being processed and incrementing the counter
+ * of registered wakeup events.
+ *
+ * Call this function for wakeup events whose processing started with calling
+ * pm_stay_awake().
+ *
+ * It is safe to call it from interrupt context.
+ */
+void pm_relax(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&events_lock, flags);
+ if (events_in_progress) {
+ events_in_progress--;
+ event_count++;
+ }
+ spin_unlock_irqrestore(&events_lock, flags);
+}
+
+/**
+ * pm_wakeup_timer_fn - Delayed finalization of a wakeup event.
+ *
+ * Decrease the counter of wakeup events being processed after it was increased
+ * by pm_wakeup_event().
+ */
+static void pm_wakeup_timer_fn(unsigned long data)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&events_lock, flags);
+ if (events_timer_expires
+ && time_before_eq(events_timer_expires, jiffies)) {
+ events_in_progress--;
+ events_timer_expires = 0;
+ }
+ spin_unlock_irqrestore(&events_lock, flags);
+}
+
+/**
+ * pm_wakeup_event - Notify the PM core of a wakeup event.
+ * @dev: Device the wakeup event is related to.
+ * @msec: Anticipated event processing time (in milliseconds).
+ *
+ * Notify the PM core of a wakeup event (signaled by @dev) that will take
+ * approximately @msec milliseconds to be processed by the kernel. Increment
+ * the counter of registered wakeup events and (if @msec is nonzero) set up
+ * the wakeup events timer to execute pm_wakeup_timer_fn() in future (if the
+ * timer has not been set up already, increment the counter of wakeup events
+ * being processed). If @dev is not NULL, the counter of wakeup events related
+ * to @dev is incremented too.
+ *
+ * It is safe to call this function from interrupt context.
+ */
+void pm_wakeup_event(struct device *dev, unsigned int msec)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&events_lock, flags);
+ event_count++;
+ if (dev)
+ dev->power.wakeup_count++;
+
+ if (msec) {
+ unsigned long expires;
+
+ expires = jiffies + msecs_to_jiffies(msec);
+ if (!expires)
+ expires = 1;
+
+ if (!events_timer_expires
+ || time_after(expires, events_timer_expires)) {
+ if (!events_timer_expires)
+ events_in_progress++;
+
+ mod_timer(&events_timer, expires);
+ events_timer_expires = expires;
+ }
+ }
+ spin_unlock_irqrestore(&events_lock, flags);
+}
+
+/**
+ * pm_check_wakeup_events - Check for new wakeup events.
+ *
+ * Compare the current number of registered wakeup events with its preserved
+ * value from the past to check if new wakeup events have been registered since
+ * the old value was stored. Check if the current number of wakeup events being
+ * processed is zero.
+ */
+bool pm_check_wakeup_events(void)
+{
+ unsigned long flags;
+ bool ret = true;
+
+ spin_lock_irqsave(&events_lock, flags);
+ if (events_check_enabled) {
+ ret = (event_count == saved_event_count) && !events_in_progress;
+ events_check_enabled = ret;
+ }
+ spin_unlock_irqrestore(&events_lock, flags);
+ return ret;
+}
+
+/**
+ * pm_get_wakeup_count - Read the number of registered wakeup events.
+ * @count: Address to store the value at.
+ *
+ * Store the number of registered wakeup events at the address in @count. Block
+ * if the current number of wakeup events being processed is nonzero.
+ *
+ * Return false if the wait for the number of wakeup events being processed to
+ * drop down to zero has been interrupted by a signal (and the current number
+ * of wakeup events being processed is still nonzero). Otherwise return true.
+ */
+bool pm_get_wakeup_count(unsigned long *count)
+{
+ bool ret;
+
+ spin_lock_irq(&events_lock);
+ if (capable(CAP_SYS_ADMIN))
+ events_check_enabled = false;
+
+ while (events_in_progress && !signal_pending(current)) {
+ spin_unlock_irq(&events_lock);
+
+ schedule_timeout_interruptible(msecs_to_jiffies(100));
+
+ spin_lock_irq(&events_lock);
+ }
+ *count = event_count;
+ ret = !events_in_progress;
+ spin_unlock_irq(&events_lock);
+ return ret;
+}
+
+/**
+ * pm_save_wakeup_count - Save the current number of registered wakeup events.
+ * @count: Value to compare with the current number of registered wakeup events.
+ *
+ * If @count is equal to the current number of registered wakeup events and the
+ * current number of wakeup events being processed is zero, store @count as the
+ * old number of registered wakeup events to be used by pm_check_wakeup_events()
+ * and return true. Otherwise return false.
+ */
+bool pm_save_wakeup_count(unsigned long count)
+{
+ bool ret = false;
+
+ spin_lock_irq(&events_lock);
+ if (count == event_count && !events_in_progress) {
+ saved_event_count = count;
+ events_check_enabled = true;
+ ret = true;
+ }
+ spin_unlock_irq(&events_lock);
+ return ret;
+}
diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 8980fee..9354dc1 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -17,7 +17,6 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/slab.h>
#include <linux/string.h>
#include <linux/pm.h>
#include <linux/device.h>
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index bf6b132..9fc630c 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -162,7 +162,7 @@ static int __cpuinit topology_cpu_callback(struct notifier_block *nfb,
topology_remove_dev(cpu);
break;
}
- return rc ? NOTIFY_BAD : NOTIFY_OK;
+ return notifier_from_errno(rc);
}
static int __cpuinit topology_sysfs_init(void)
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