This is a note to let you know that I've just added the patch titled
Subject: Driver core: Call device_pm_add() after bus_add_device() in device_add()
to my gregkh-2.6 tree. Its filename is
driver-core-call-device_pm_add-after-bus_add_device-in-device_add.patch
This tree can be found at
http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
>From rjw@xxxxxxx Thu Mar 13 13:45:38 2008
From: "Rafael J. Wysocki" <rjw@xxxxxxx>
Date: Wed, 12 Mar 2008 00:59:38 +0100
Subject: Driver core: Call device_pm_add() after bus_add_device() in device_add()
To: Greg KH <greg@xxxxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, David Brownell <david-b@xxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Pavel Machek <pavel@xxxxxx>, pm list <linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Message-ID: <200803120059.39902.rjw@xxxxxxx>
Content-Disposition: inline
From: Rafael J. Wysocki <rjw@xxxxxxx>
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@xxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/base/core.c | 15 +++++----------
drivers/base/power/main.c | 4 +++-
2 files changed, 8 insertions(+), 11 deletions(-)
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -818,17 +818,12 @@ 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)
@@ -848,9 +843,9 @@ 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);
--- a/drivers/base/power/main.c
+++ b/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;
Patches currently in gregkh-2.6 which might be from rjw@xxxxxxx are
driver-core/power_state-remove-it-from-driver-core.patch
driver-core/pm-handle-device-registrations-during-suspend-resume.patch
driver-core/pm-make-wakeup-flags-available-whenever-config_pm-is-set.patch
driver-core/driver-core-call-device_pm_add-after-bus_add_device-in-device_add.patch
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