Auto merge with /home/aegl/GIT/linus

8 files changed, 35 insertions, 95 deletions

diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 6662b545e0a9..a47928a2e575 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -1,6 +1,6 @@
 # Makefile for the Linux device tree
 
-obj-y			:= core.o sys.o interface.o bus.o \
+obj-y			:= core.o sys.o bus.o \
 			   driver.o class.o class_simple.o platform.o \
 			   cpu.o firmware.o init.o map.o dmapool.o \
 			   attribute_container.o transport_class.o
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index f4fa27315fb4..3cb04bb04c2b 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -390,7 +390,6 @@ void device_release_driver(struct device * dev)
 		sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
 		sysfs_remove_link(&dev->kobj, "driver");
 		list_del_init(&dev->driver_list);
-		device_detach_shutdown(dev);
 		if (drv->remove)
 			drv->remove(dev);
 		dev->driver = NULL;
@@ -405,9 +404,8 @@ void device_release_driver(struct device * dev)
 
 static void driver_detach(struct device_driver * drv)
 {
-	struct list_head * entry, * next;
-	list_for_each_safe(entry, next, &drv->devices) {
-		struct device * dev = container_of(entry, struct device, driver_list);
+	while (!list_empty(&drv->devices)) {
+		struct device * dev = container_of(drv->devices.next, struct device, driver_list);
 		device_release_driver(dev);
 	}
 }
diff --git a/drivers/base/core.c b/drivers/base/core.c
index a7cedd8cefe5..fbc223486f81 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -31,8 +31,6 @@ int (*platform_notify_remove)(struct device * dev) = NULL;
 #define to_dev(obj) container_of(obj, struct device, kobj)
 #define to_dev_attr(_attr) container_of(_attr, struct device_attribute, attr)
 
-extern struct attribute * dev_default_attrs[];
-
 static ssize_t
 dev_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
 {
@@ -89,7 +87,6 @@ static void device_release(struct kobject * kobj)
 static struct kobj_type ktype_device = {
 	.release	= device_release,
 	.sysfs_ops	= &dev_sysfs_ops,
-	.default_attrs	= dev_default_attrs,
 };
 
 
@@ -139,7 +136,7 @@ static int dev_hotplug(struct kset *kset, struct kobject *kobj, char **envp,
 	buffer = &buffer[length];
 	buffer_size -= length;
 
-	if (dev->bus->hotplug) {
+	if (dev->bus && dev->bus->hotplug) {
 		/* have the bus specific function add its stuff */
 		retval = dev->bus->hotplug (dev, envp, num_envp, buffer, buffer_size);
 			if (retval) {
@@ -248,6 +245,7 @@ int device_add(struct device *dev)
 
 	if ((error = kobject_add(&dev->kobj)))
 		goto Error;
+	kobject_hotplug(&dev->kobj, KOBJ_ADD);
 	if ((error = device_pm_add(dev)))
 		goto PMError;
 	if ((error = bus_add_device(dev)))
@@ -260,14 +258,13 @@ int device_add(struct device *dev)
 	/* notify platform of device entry */
 	if (platform_notify)
 		platform_notify(dev);
-
-	kobject_hotplug(&dev->kobj, KOBJ_ADD);
  Done:
 	put_device(dev);
 	return error;
  BusError:
 	device_pm_remove(dev);
  PMError:
+	kobject_hotplug(&dev->kobj, KOBJ_REMOVE);
 	kobject_del(&dev->kobj);
  Error:
 	if (parent)
diff --git a/drivers/base/interface.c b/drivers/base/interface.c
deleted file mode 100644
index bd515843a0cb..000000000000
--- a/drivers/base/interface.c
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * drivers/base/interface.c - common driverfs interface that's exported to
- * 	the world for all devices.
- *
- * Copyright (c) 2002-3 Patrick Mochel
- * Copyright (c) 2002-3 Open Source Development Labs
- *
- * This file is released under the GPLv2
- *
- */
-
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/stat.h>
-#include <linux/string.h>
-
-/**
- *	detach_state - control the default power state for the device.
- *
- *	This is the state the device enters when it's driver module is
- *	unloaded. The value is an unsigned integer, in the range of 0-4.
- *	'0' indicates 'On', so no action will be taken when the driver is
- *	unloaded. This is the default behavior.
- *	'4' indicates 'Off', meaning the driver core will call the driver's
- *	shutdown method to quiesce the device.
- *	1-3 indicate a low-power state for the device to enter via the
- *	driver's suspend method.
- */
-
-static ssize_t detach_show(struct device * dev, char * buf)
-{
-	return sprintf(buf, "%u\n", dev->detach_state);
-}
-
-static ssize_t detach_store(struct device * dev, const char * buf, size_t n)
-{
-	u32 state;
-	state = simple_strtoul(buf, NULL, 10);
-	if (state > 4)
-		return -EINVAL;
-	dev->detach_state = state;
-	return n;
-}
-
-static DEVICE_ATTR(detach_state, 0644, detach_show, detach_store);
-
-
-struct attribute * dev_default_attrs[] = {
-	&dev_attr_detach_state.attr,
-	NULL,
-};
diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
index e5eda746f2a6..2e700d795cf1 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -1,18 +1,7 @@
-
-
-enum {
-	DEVICE_PM_ON,
-	DEVICE_PM1,
-	DEVICE_PM2,
-	DEVICE_PM3,
-	DEVICE_PM_OFF,
-};
-
 /*
  * shutdown.c
  */
 
-extern int device_detach_shutdown(struct device *);
 extern void device_shutdown(void);
 
 
diff --git a/drivers/base/power/resume.c b/drivers/base/power/resume.c
index f8f5055754d6..26468971ef5a 100644
--- a/drivers/base/power/resume.c
+++ b/drivers/base/power/resume.c
@@ -22,8 +22,17 @@ extern int sysdev_resume(void);
 
 int resume_device(struct device * dev)
 {
-	if (dev->bus && dev->bus->resume)
+	if (dev->power.pm_parent
+			&& dev->power.pm_parent->power.power_state) {
+		dev_err(dev, "PM: resume from %d, parent %s still %d\n",
+			dev->power.power_state,
+			dev->power.pm_parent->bus_id,
+			dev->power.pm_parent->power.power_state);
+	}
+	if (dev->bus && dev->bus->resume) {
+		dev_dbg(dev,"resuming\n");
 		return dev->bus->resume(dev);
+	}
 	return 0;
 }
 
diff --git a/drivers/base/power/shutdown.c b/drivers/base/power/shutdown.c
index d1e023fbe169..f50a08be424b 100644
--- a/drivers/base/power/shutdown.c
+++ b/drivers/base/power/shutdown.c
@@ -19,20 +19,6 @@
 extern struct subsystem devices_subsys;
 
 
-int device_detach_shutdown(struct device * dev)
-{
-	if (!dev->detach_state)
-		return 0;
-
-	if (dev->detach_state == DEVICE_PM_OFF) {
-		if (dev->driver && dev->driver->shutdown)
-			dev->driver->shutdown(dev);
-		return 0;
-	}
-	return dpm_runtime_suspend(dev, dev->detach_state);
-}
-
-
 /**
  * We handle system devices differently - we suspend and shut them
  * down last and resume them first. That way, we don't do anything stupid like
@@ -52,13 +38,12 @@ void device_shutdown(void)
 	struct device * dev;
 
 	down_write(&devices_subsys.rwsem);
-	list_for_each_entry_reverse(dev, &devices_subsys.kset.list, kobj.entry) {
-		pr_debug("shutting down %s: ", dev->bus_id);
+	list_for_each_entry_reverse(dev, &devices_subsys.kset.list,
+				kobj.entry) {
 		if (dev->driver && dev->driver->shutdown) {
-			pr_debug("Ok\n");
+			dev_dbg(dev, "shutdown\n");
 			dev->driver->shutdown(dev);
-		} else
-			pr_debug("Ignored.\n");
+		}
 	}
 	up_write(&devices_subsys.rwsem);
 
diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c
index a0b5cf689e63..0ec44ef840be 100644
--- a/drivers/base/power/suspend.c
+++ b/drivers/base/power/suspend.c
@@ -39,12 +39,25 @@ int suspend_device(struct device * dev, pm_message_t state)
 {
 	int error = 0;
 
-	dev_dbg(dev, "suspending\n");
+	if (dev->power.power_state) {
+		dev_dbg(dev, "PM: suspend %d-->%d\n",
+			dev->power.power_state, state);
+	}
+	if (dev->power.pm_parent
+			&& dev->power.pm_parent->power.power_state) {
+		dev_err(dev,
+			"PM: suspend %d->%d, parent %s already %d\n",
+			dev->power.power_state, state,
+			dev->power.pm_parent->bus_id,
+			dev->power.pm_parent->power.power_state);
+	}
 
 	dev->power.prev_state = dev->power.power_state;
 
-	if (dev->bus && dev->bus->suspend && !dev->power.power_state)
+	if (dev->bus && dev->bus->suspend && !dev->power.power_state) {
+		dev_dbg(dev, "suspending\n");
 		error = dev->bus->suspend(dev, state);
+	}
 
 	return error;
 }