login
Header Space

 
 

[PATCH 2/3] Driver core: Call device_pm_add() after bus_add_device() in device_add()

Score:
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
To: Greg KH <greg@...>
Cc: Alan Stern <stern@...>, Andrew Morton <akpm@...>, David Brownell <david-b@...>, LKML <linux-kernel@...>, Pavel Machek <pavel@...>, pm list <linux-pm@...>
Date: Tuesday, March 11, 2008 - 7:59 pm

From: Rafael J. Wysocki <rjw@sisk.pl>

Include dpm_sysfs_add() into device_pm_add(), in analogy with
device_pm_remove(), and modify device_add() to call the latter after
bus_add_device(), to avoid situations in which the PM core may
attempt to suspend a device the registration of which has not been
successful.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
 drivers/base/core.c       |   15 +++++----------
 drivers/base/power/main.c |    4 +++-
 2 files changed, 8 insertions(+), 11 deletions(-)

Index: linux-2.6/drivers/base/core.c
===================================================================
--- linux-2.6.orig/drivers/base/core.c
+++ linux-2.6/drivers/base/core.c
@@ -812,17 +812,12 @@ int device_add(struct device *dev)
 	error = device_add_attrs(dev);
 	if (error)
 		goto AttrsError;
-	error = dpm_sysfs_add(dev);
-	if (error)
-		goto PMError;
-	error = device_pm_add(dev);
-	if (error) {
-		dpm_sysfs_remove(dev);
-		goto PMError;
-	}
 	error = bus_add_device(dev);
 	if (error)
 		goto BusError;
+	error = device_pm_add(dev);
+	if (error)
+		goto PMError;
 	kobject_uevent(&dev->kobj, KOBJ_ADD);
 	bus_attach_device(dev);
 	if (parent)
@@ -842,9 +837,9 @@ int device_add(struct device *dev)
  Done:
 	put_device(dev);
 	return error;
- BusError:
-	device_pm_remove(dev);
  PMError:
+	bus_remove_device(dev);
+ BusError:
 	if (dev->bus)
 		blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
 					     BUS_NOTIFY_DEL_DEVICE, dev);
Index: linux-2.6/drivers/base/power/main.c
===================================================================
--- linux-2.6.orig/drivers/base/power/main.c
+++ linux-2.6/drivers/base/power/main.c
@@ -81,7 +81,9 @@ int device_pm_add(struct device *dev)
 		WARN_ON(true);
 		error = -EBUSY;
 	} else {
-		list_add_tail(&dev->power.entry, &dpm_active);
+		error = dpm_sysfs_add(dev);
+		if (!error)
+			list_add_tail(&dev->power.entry, &dpm_active);
 	}
 	mutex_unlock(&dpm_list_mtx);
 	return error;
--
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

Messages in current thread:
[PATCH 0/3] PM core fixes, Rafael J. Wysocki, (Tue Mar 11, 7:55 pm)
[PATCH 2/3] Driver core: Call device_pm_add() after bus_add_..., Rafael J. Wysocki, (Tue Mar 11, 7:59 pm)
[PATCH 3/3] PM: make wakeup flags available whenever CONFIG_..., Rafael J. Wysocki, (Tue Mar 11, 8:01 pm)
[PATCH 1/3] PM: Handle device registrations during suspend/r..., Rafael J. Wysocki, (Tue Mar 11, 7:57 pm)
speck-geostationary