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Date: Tue, 5 Aug 2008 18:38:13 +0530
From: "Dasgupta, Romit" <romit@...com>
To: David Engraf <david.engraf@...com.eu>
CC: Alan Stern <stern@...land.harvard.edu>,
"Rafael J. Wysocki" <rjw@...k.pl>, Greg KH <greg@...ah.com>,
"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>
Subject: RE: [PATCH] [PM] Fixes missing PM entries in sysfs without
CONFIG_PM_SLEEP
I think it is my mailer program that is adding the tabs.
In Alan's patch I just changed the PMError label with SysFSError.
>-----Original Message-----
>From: linux-usb-owner@...r.kernel.org [mailto:linux-usb-owner@...r.kernel.org]
>On Behalf Of David Engraf
>Sent: Tuesday, August 05, 2008 6:29 PM
>To: Dasgupta, Romit
>Cc: Alan Stern; Rafael J. Wysocki; Greg KH; linux-usb@...r.kernel.org; linux-
>kernel@...r.kernel.org; Linux-pm mailing list
>Subject: Re: [PATCH] [PM] Fixes missing PM entries in sysfs without
>CONFIG_PM_SLEEP
>
>Alan's patch is working on my system with CONFIG_PM and without
>CONFIG_PM_SLEEP/CONFIG_USB_SUSPEND. Romit, I couldn't check your patch
>because I was getting errors from the patch program (maybe the tabs).
>
>Thanks again, David Engraf
>
>> A minor change below: Removed old goto label PMError and introduced
>SysFSError.
>> Tested with CONFIG_PM, CONFIG_PM_SLEEP, without CONFIG_PM and
>ofcourse with CONFIG_USB_SUSPEND. Works fine.
>>
>>
>> diff --git a/drivers/base/core.c b/drivers/base/core.c
>> index 068aa1c..9c77939 100644
>> --- a/drivers/base/core.c
>> +++ b/drivers/base/core.c
>> @@ -541,6 +541,7 @@ void device_initialize(struct device *dev)
>> 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);
>> }
>>
>> @@ -897,9 +898,10 @@ int device_add(struct device *dev)
>> error = bus_add_device(dev);
>> if (error)
>> goto BusError;
>> - error = device_pm_add(dev);
>> + error = dpm_sysfs_add(dev);
>> if (error)
>> - goto PMError;
>> + goto SysFSError;
>> + device_pm_add(dev);
>> kobject_uevent(&dev->kobj, KOBJ_ADD);
>> bus_attach_device(dev);
>> if (parent)
>> @@ -920,7 +922,7 @@ int device_add(struct device *dev)
>> Done:
>> put_device(dev);
>> return error;
>> - PMError:
>> + SysFSError:
>> bus_remove_device(dev);
>> BusError:
>> if (dev->bus)
>> @@ -1007,6 +1009,7 @@ void device_del(struct device *dev)
>> struct class_interface *class_intf;
>>
>> device_pm_remove(dev);
>> + dpm_sysfs_remove(dev);
>> if (parent)
>> klist_del(&dev->knode_parent);
>> if (MAJOR(dev->devt)) {
>> diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
>> index 3250c52..d1f752b 100644
>> --- a/drivers/base/power/main.c
>> +++ b/drivers/base/power/main.c
>> @@ -67,10 +67,8 @@ void device_pm_unlock(void)
>> * device_pm_add - add a device to the list of active devices
>> * @dev: Device to be added to the list
>> */
>> -int device_pm_add(struct device *dev)
>> +void device_pm_add(struct device *dev)
>> {
>> - int error;
>> -
>> pr_debug("PM: Adding info for %s:%s\n",
>> dev->bus ? dev->bus->name : "No Bus",
>> kobject_name(&dev->kobj));
>> @@ -89,13 +87,8 @@ int device_pm_add(struct device *dev)
>> */
>> WARN_ON(true);
>> }
>> - error = dpm_sysfs_add(dev);
>> - if (!error) {
>> - dev->power.status = DPM_ON;
>> - list_add_tail(&dev->power.entry, &dpm_list);
>> - }
>> + list_add_tail(&dev->power.entry, &dpm_list);
>> mutex_unlock(&dpm_list_mtx);
>> - return error;
>> }
>>
>> /**
>> @@ -110,7 +103,6 @@ void device_pm_remove(struct device *dev)
>> dev->bus ? dev->bus->name : "No Bus",
>> kobject_name(&dev->kobj));
>> mutex_lock(&dpm_list_mtx);
>> - dpm_sysfs_remove(dev);
>> list_del_init(&dev->power.entry);
>> mutex_unlock(&dpm_list_mtx);
>> }
>> diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
>> index a3252c0..41f51fa 100644
>> --- a/drivers/base/power/power.h
>> +++ b/drivers/base/power/power.h
>> @@ -1,3 +1,8 @@
>> +static inline void device_pm_init(struct device *dev)
>> +{
>> + dev->power.status = DPM_ON;
>> +}
>> +
>> #ifdef CONFIG_PM_SLEEP
>>
>> /*
>> @@ -11,12 +16,12 @@ static inline struct device *to_device(struct list_head
>*entry)
>> return container_of(entry, struct device, power.entry);
>> }
>>
>> -extern int device_pm_add(struct device *);
>> +extern void device_pm_add(struct device *);
>> extern void device_pm_remove(struct device *);
>>
>> #else /* CONFIG_PM_SLEEP */
>>
>> -static inline int device_pm_add(struct device *dev) { return 0; }
>> +static inline void device_pm_add(struct device *dev) {}
>> static inline void device_pm_remove(struct device *dev) {}
>>
>> #endif
>>
>>
>>> -----Original Message-----
>>> From: Alan Stern [mailto:stern@...land.harvard.edu]
>>> Sent: Monday, August 04, 2008 9:15 PM
>>> To: Rafael J. Wysocki
>>> Cc: Dasgupta, Romit; David Engraf; Greg KH; linux-usb@...r.kernel.org; linux-
>>> kernel@...r.kernel.org; Linux-pm mailing list
>>> Subject: Re: [PATCH] [PM] Fixes missing PM entries in sysfs without
>>> CONFIG_PM_SLEEP
>>>
>>> On Mon, 4 Aug 2008, Rafael J. Wysocki wrote:
>>>
>>>
>>>>> Do you think we will want to make device_pm_add() return an error at
>>>>> some point in the future?
>>>>>
>>>> Well, maybe, but not any time soon. :-)
>>>>
>>> Okay, here's the updated patch. Awaiting comments from the testers...
>>>
>>> Alan Stern
>>>
>>>
>>>
>>> Index: usb-2.6/drivers/base/power/power.h
>>>
>================================================================
>>> ===
>>> --- usb-2.6.orig/drivers/base/power/power.h
>>> +++ usb-2.6/drivers/base/power/power.h
>>> @@ -1,3 +1,8 @@
>>> +static inline void device_pm_init(struct device *dev)
>>> +{
>>> + dev->power.status = DPM_ON;
>>> +}
>>> +
>>> #ifdef CONFIG_PM_SLEEP
>>>
>>> /*
>>> @@ -11,12 +16,12 @@ static inline struct device *to_device(s
>>> return container_of(entry, struct device, power.entry);
>>> }
>>>
>>> -extern int device_pm_add(struct device *);
>>> +extern void device_pm_add(struct device *);
>>> extern void device_pm_remove(struct device *);
>>>
>>> #else /* CONFIG_PM_SLEEP */
>>>
>>> -static inline int device_pm_add(struct device *dev) { return 0; }
>>> +static inline void device_pm_add(struct device *dev) {}
>>> static inline void device_pm_remove(struct device *dev) {}
>>>
>>> #endif
>>> Index: usb-2.6/drivers/base/core.c
>>>
>================================================================
>>> ===
>>> --- usb-2.6.orig/drivers/base/core.c
>>> +++ usb-2.6/drivers/base/core.c
>>> @@ -542,6 +542,7 @@ void device_initialize(struct device *de
>>> 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);
>>> }
>>>
>>> @@ -898,9 +899,10 @@ int device_add(struct device *dev)
>>> error = bus_add_device(dev);
>>> if (error)
>>> goto BusError;
>>> - error = device_pm_add(dev);
>>> + error = dpm_sysfs_add(dev);
>>> if (error)
>>> goto PMError;
>>> + device_pm_add(dev);
>>> kobject_uevent(&dev->kobj, KOBJ_ADD);
>>> bus_attach_device(dev);
>>> if (parent)
>>> @@ -1008,6 +1010,7 @@ void device_del(struct device *dev)
>>> struct class_interface *class_intf;
>>>
>>> device_pm_remove(dev);
>>> + dpm_sysfs_remove(dev);
>>> if (parent)
>>> klist_del(&dev->knode_parent);
>>> if (MAJOR(dev->devt)) {
>>> Index: usb-2.6/drivers/base/power/main.c
>>>
>================================================================
>>> ===
>>> --- usb-2.6.orig/drivers/base/power/main.c
>>> +++ usb-2.6/drivers/base/power/main.c
>>> @@ -67,10 +67,8 @@ void device_pm_unlock(void)
>>> * device_pm_add - add a device to the list of active devices
>>> * @dev: Device to be added to the list
>>> */
>>> -int device_pm_add(struct device *dev)
>>> +void device_pm_add(struct device *dev)
>>> {
>>> - int error;
>>> -
>>> pr_debug("PM: Adding info for %s:%s\n",
>>> dev->bus ? dev->bus->name : "No Bus",
>>> kobject_name(&dev->kobj));
>>> @@ -89,13 +87,9 @@ int device_pm_add(struct device *dev)
>>> */
>>> WARN_ON(true);
>>> }
>>> - error = dpm_sysfs_add(dev);
>>> - if (!error) {
>>> - dev->power.status = DPM_ON;
>>> - list_add_tail(&dev->power.entry, &dpm_list);
>>> - }
>>> +
>>> + list_add_tail(&dev->power.entry, &dpm_list);
>>> mutex_unlock(&dpm_list_mtx);
>>> - return error;
>>> }
>>>
>>> /**
>>> @@ -110,7 +104,6 @@ void device_pm_remove(struct device *dev
>>> dev->bus ? dev->bus->name : "No Bus",
>>> kobject_name(&dev->kobj));
>>> mutex_lock(&dpm_list_mtx);
>>> - dpm_sysfs_remove(dev);
>>> list_del_init(&dev->power.entry);
>>> mutex_unlock(&dpm_list_mtx);
>>> }
>>>
>>
>>
>
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