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path: root/drivers/base/power
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2008-05-25x86: move tracedata to RODATAJan Beulich
.. allowing it to be write-protected just as other read-only data under CONFIG_DEBUG_RODATA. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-15Clean up 'print_fn_descriptor_symbol()' typesLinus Torvalds
Everybody wants to pass it a function pointer, and in fact, that is what you _must_ pass it for it to make sense (since it knows that ia64 and ppc64 use descriptors for function pointers and fetches the actual address from there). So don't make the argument be a 'unsigned long' and force everybody to add a cast. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-22Relax check on adding children of suspended devicesRafael J. Wysocki
Do not refuse to actually register children of suspended devices, but still warn about attempts to do that. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-19PM: Remove destroy_suspended_device()Rafael J. Wysocki
After 2.6.24 there was a plan to make the PM core acquire all device semaphores during a suspend/hibernation to protect itself from concurrent operations involving device objects. That proved to be too heavy-handed and we found a better way to achieve the goal, but before it happened, we had introduced the functions device_pm_schedule_removal() and destroy_suspended_device() to allow drivers to "safely" destroy a suspended device and we had adapted some drivers to use them. Now that these functions are no longer necessary, it seems reasonable to remove them and modify their users to use the normal device unregistration instead. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-19PM: Make wakeup flags available whenever CONFIG_PM is setAlan Stern
The various wakeup flags and their accessor macros in struct dev_pm_info should be available whenever CONFIG_PM is enabled, not just when CONFIG_PM_SLEEP is on. Otherwise remote wakeup won't always be configurable for runtime power management. This patch (as1056b) fixes the oversight. David Brownell adds: More accurately, fixes the "regression" ... as noted sometime last summer, after 296699de6bdc717189a331ab6bbe90e05c94db06 introduced CONFIG_SUSPEND. But that didn't make the regression list for that kernel, ergo the delay in fixing it. [rjw: rebased] Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-19Driver core: Call device_pm_add() after bus_add_device() in device_add()Rafael J. Wysocki
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> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-19PM: Handle device registrations during suspend/resumeRafael J. Wysocki
Modify the PM core to protect its data structures, specifically the dpm_active list, from being corrupted if a child of the currently suspending device is registered concurrently with its ->suspend() callback. In that case, since the new device (the child) is added to dpm_active after its parent, the PM core will attempt to suspend it after the parent, which is wrong. Introduce a new member of struct dev_pm_info, called 'sleeping', and use it to check if the parent of the device being added to dpm_active has been suspended, in which case the device registration fails. Also, use 'sleeping' for checking if the ordering of devices on dpm_active is correct. Introduce variable 'all_sleeping' that will be set to 'true' once all devices have been suspended and make new device registrations fail until 'all_sleeping' is reset to 'false', in order to avoid having unsuspended devices around while the system is going into a sleep state. Remove pm_sleep_rwsem which is not necessary any more. Special thanks to Alan Stern for discussions and suggestions that lead to the creation of this patch. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-19power_state: remove it from driver corePavel Machek
power_state is scheduled for removal, and it is used only for debug prints by driver core. Remove it. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-03-04PM: fix new mutex-locking bug in the PM coreAlan Stern
This patch (as1041) fixes a bug introduced by the acquire-all-device-semaphores reversion. The error pathway of dpm_suspend() fails to reacquire a mutex it should be holding. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-03-04PM: Do not acquire device semaphores upfront during suspendRafael J. Wysocki
Remove the code that acquires all device semaphores from the suspend code path as it causes multiple problems to appear (most notably, http://bugzilla.kernel.org/show_bug.cgi?id=10030) and revert the change introduced by commit 4145ed6dc597a9bea5f6ae8c574653b2de10620f depending on the code being removed. Remove pm_sleep_lock()/pm_sleep_unlock() from device_add() to avoid the issue reported at http://bugzilla.kernel.org/show_bug.cgi?id=9874. It should fix the regreesions reported at: http://bugzilla.kernel.org/show_bug.cgi?id=9874 http://bugzilla.kernel.org/show_bug.cgi?id=10030 Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-21Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (26 commits) PM: Make suspend_device() static PCI ACPI: Fix comment describing acpi_pci_choose_state Hibernation: Handle DEBUG_PAGEALLOC on x86 ACPI: fix build warning ACPI: TSC breaks atkbd suspend ACPI: remove is_processor_present prototype acer-wmi: Add DMI match for mail LED on Acer TravelMate 4200 series ACPI: sparse fix, replace macro with static function ACPI: thinkpad-acpi: add tablet-mode reporting ACPI: thinkpad-acpi: minor hotkey_radio_sw fixes ACPI: thinkpad-acpi: improve thinkpad-acpi input device documentation ACPI: thinkpad-acpi: issue input events for tablet swivel events ACPI: thinkpad-acpi: make the video output feature optional ACPI: thinkpad-acpi: synchronize input device switches ACPI: thinkpad-acpi: always track input device open/close ACPI: thinkpad-acpi: trivial fix to documentation ACPI: thinkpad-acpi: trivial fix to module_desc typo intel_menlo: extract return values using PTR_ERR ACPI video: check for error from thermal_cooling_device_register ACPI thermal: extract return values using PTR_ERR ...
2008-02-21PM: Remove unbalanced mutex_unlock() from dpm_resume()Rafael J. Wysocki
Remove an unnecessary unlocking of dpm_list_mtx in the error path in drivers/base/power/main.c:dpm_suspend() . Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-21driver-core: fix kernel-doc function parametersRandy Dunlap
Fix drivers/base/ missing kernel-doc parameters: Warning(linux-2.6.24-git12//drivers/base/driver.c:133): No description found for parameter 'drv' Warning(linux-2.6.24-git12//drivers/base/driver.c:133): No description found for parameter 'kobj' Warning(linux-2.6.24-git12//drivers/base/driver.c:133): No description found for parameter 'fmt' Warning(linux-2.6.24-git12//drivers/base/power/main.c:530): No description found for parameter 'state' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-21PM: Make suspend_device() staticAdrian Bunk
suspend_device() can become static. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-02PM: Export device_pm_schedule_removalRafael J. Wysocki
Move the declaration of device_pm_schedule_removal() to device.h and make it exported, as it will be used directly by some drivers for unregistering device objects during suspend/resume cycles in a safe way. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-01PM: Make PM_TRACE more architecture independentJohannes Berg
When trying to debug a suspend failure I started implementing PM_TRACE for powerpc. I then noticed that I'm debugging a suspend failure and so PM_TRACE isn't useful at all, but thought that nonetheless this could be useful in the future. Basically, to support PM_TRACE, you add a Kconfig option that selects PM_TRACE and provides the infrastructure as per the help text of PM_TRACE. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
2008-01-28convert drivers/base/power/Makefile to ccflagsJohannes Berg
This patch converts drivers/base/power/Makefile to use ccflags instead of EXTRA_CFLAGS. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2008-01-24driver core: clean up device_shutdownGreg Kroah-Hartman
device_shutdown does not need to be in a separate file. Move it into the driver core file where it belongs. This also moves us one more step closer to making devices_kset static, now only the crazy sysdevs are keeping that from happening... Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24driver core: clean up shutdown.cGreg Kroah-Hartman
shutdown.c had some stuff it did not need, including a duplicate extern in the power.h file. This cleans up all of that. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24kset: convert /sys/devices to use kset_createGreg Kroah-Hartman
Dynamically create the kset instead of declaring it statically. We also rename devices_subsys to devices_kset to catch all users of the variable. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24PM: Acquire device locks on suspendRafael J. Wysocki
This patch reorganizes the way suspend and resume notifications are sent to drivers. The major changes are that now the PM core acquires every device semaphore before calling the methods, and calls to device_add() during suspends will fail, while calls to device_del() during suspends will block. It also provides a way to safely remove a suspended device with the help of the PM core, by using the device_pm_schedule_removal() callback introduced specifically for this purpose, and updates two drivers (msr and cpuid) that need to use it. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-11-28create /sys/.../power when CONFIG_PM is setDaniel Drake
The CONFIG_SUSPEND changes in 2.6.23 caused a regression under certain configuration conditions (SUSPEND=n, USB_AUTOSUSPEND=y) where all USB device attributes in sysfs (idVendor, idProduct, ...) silently disappeared, causing udev breakage and more. The cause of this is that the /sys/.../power subdirectory is now only created when CONFIG_PM_SLEEP is set, however, it should be created whenever CONFIG_PM is set to handle the above situation. The following patch fixes the regression. Signed-off-by: Daniel Drake <dsd@gentoo.org> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: stable <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-18pm_trace displays the wrong time from the RTCRafael J. Wysocki
The way in which read_magic_time() displays the date read from the RTC is apparently confusing to the users (cf. https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=250238). Make it print dates in the standard way. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Dave Jones <davej@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-12PM: merge device power-management source filesAlan Stern
This patch (as993) merges the suspend.c and resume.c files in drivers/base/power into main.c, making some public symbols private. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12drivers/base/power/: make 2 functions staticAdrian Bunk
suspend_device() and resume_device() can now become static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-29Introduce CONFIG_SUSPEND for suspend-to-Ram and standbyRafael J. Wysocki
Introduce CONFIG_SUSPEND representing the ability to enter system sleep states, such as the ACPI S3 state, and allow the user to choose SUSPEND and HIBERNATION independently of each other. Make HOTPLUG_CPU be selected automatically if SUSPEND or HIBERNATION has been chosen and the kernel is intended for SMP systems. Also, introduce CONFIG_PM_SLEEP which is automatically selected if CONFIG_SUSPEND or CONFIG_HIBERNATION is set and use it to select the code needed for both suspend and hibernation. The top-level power management headers and the ACPI code related to suspend and hibernation are modified to use the new definitions (the changes in drivers/acpi/sleep/main.c are, mostly, moving code to reduce the number of ifdefs). There are many other files in which CONFIG_PM can be replaced with CONFIG_PM_SLEEP or even with CONFIG_SUSPEND, but they can be updated in the future. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-26Fix ThinkPad T42 poweroff failure introduced by by "PM: Introduce ↵Rafael J. Wysocki
pm_power_off_prepare" Commit bd804eba1c8597cbb7cd5a5f9fe886aae16a079a ("PM: Introduce pm_power_off_prepare") caused problems in the poweroff path, as reported by YOSHIFUJI Hideaki / 吉藤英明. Generally, sysdev_shutdown() should be called after the ACPI preparation for powering the system off. To make it happen, we can separate sysdev_shutdown() from device_shutdown() and call it directly wherever necessary. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-21x86: PM_TRACE supportNigel Cunningham
Signed-off-by: Nigel Cunningham <nigel@nigel.suspend2.net> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19PM: Do not require dev spew to get PM_DEBUGBen Collins
In order to enable things like PM_TRACE, you're required to enable PM_DEBUG, which sends a large spew of messages on boot, and often times can overflow dmesg buffer. Create new PM_VERBOSE and shift that to be the option that enables drivers/base/power's messages. Signed-off-by: Ben Collins <bcollins@ubuntu.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-18PM: remove deprecated dpm_runtime_* routinesAlan Stern
This patch (as933) removes the deprecated dpm_runtime_suspend() and dpm_runtime_resume() routines from the PM core. The only user of those routines is the PCMCIA ds driver; local replacements are added. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-18PM: Remove deprecated sysfs filesAlan Stern
This patch (as932) removes the deprecated sysfs .../power/state attribute files. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11PM: Do not check parent state in suspend and resume core codeRafael J. Wysocki
The checks if the device's parent is in the right state done in drivers/base/power/suspend.c and drivers/base/power/resume.c serve no particular purpose, since if the parent is in a wrong power state, the device's suspend or resume callbacks are supposed to return an error anyway. Moreover, they are also useless from the sanity checking point of view, because they rely on the code being checked to set dev->parent->power.power_state.event appropriately, which need not happen if that code is buggy. For these reasons they can be removed. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11PM: Remove power_state.event checks from suspend core codeRafael J. Wysocki
The suspend routines should be called for every device during a system sleep transition, regardless of the device's state, so that drivers can regard these method calls as notifications that the system is about to go to sleep, rather than as directives to put their devices into the 'off' state. This is documented in Documentation/power/devices.txt and is already done in the core resume code, so it seems reasonable to make the core suspend code behave accordingly. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11PM: Remove prev_state from struct dev_pm_infoRafael J. Wysocki
The prev_state member of struct dev_pm_info (defined in include/linux/pm.h) is only used during a resume to check if the device's state before the suspend was 'off', in which case the device is not resumed. However, in such cases the decision whether or not to resume the device should be made on the driver level and the resume callbacks from the device's bus and class should be executed anyway (the may be needed for some things other than just powering on the device). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11PM: Simplify suspend_deviceRafael J. Wysocki
Reduce code duplication in drivers/base/suspend.c by introducing a separate function for printing diagnostic messages. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11PM: Remove pm_parent from struct dev_pm_infoRafael J. Wysocki
The pm_parent member of struct dev_pm_info (defined in include/linux/pm.h) is only used to check if the device's parent is in the right state while the device is being suspended or resumed. However, this can be done just as well with the help of the parent pointer in struct device, so pm_parent can be removed along with some code that handles it. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11Power Management: use mutexes instead of semaphoresMatthias Kaehlcke
The Power Management code uses semaphores as mutexes. Use the mutex API instead of the (binary) semaphores. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-05-02remove "struct subsystem" as it is no longer neededGreg Kroah-Hartman
We need to work on cleaning up the relationship between kobjects, ksets and ktypes. The removal of 'struct subsystem' is the first step of this, especially as it is not really needed at all. Thanks to Kay for fixing the bugs in this patch. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-04-27define platform wakeup hook, use in pci_enable_wake()David Brownell
This defines a platform hook to enable/disable a device as a wakeup event source. It's initially for use with ACPI, but more generally it could be used whenever enable_irq_wake()/disable_irq_wake() don't suffice. The hook is called -- if available -- inside pci_enable_wake(); and the semantics of that call are enhanced so that support for PCI PME# is no longer needed. It can now work for devices with "legacy PCI PM", when platform support allows it. (That support would use some board-specific signal for for the same purpose as PME#.) [akpm@linux-foundation.org: Make it compile with CONFIG_PM=n] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Cc: Len Brown <lenb@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-04-27Driver core: remove use of rwsemGreg Kroah-Hartman
This lock is never used by the rest of the driver core, so the fact that we are grabbing it here means it isn't correct... Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-04-27Driver core: add suspend() and resume() to struct device_typeDmitry Torokhov
Driver core: add suspend() and resume() to struct device_type In cases when there are devices of different types in the same class we can't use class's implementation of suspend and resume methods and we need to add them to struct device_type instead. Also fix error handling in resume code (we should not try to call class's resume method iof bus's resume method for the device failed. Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-04-11[PATCH] PM: use kobject_name() to access kobject namesDmitry Torokhov
Noone should use kobj.name directly since it may contain garbage. Objects with longer names have them stored in separately allocated memory pointed to by kobj->k_name. Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-09-25Driver core: fix comments in drivers/base/power/resume.cDmitry Torokhov
Driver core: fix comments in drivers/base/power/resume.c Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-25PM: device_suspend/resume may sleepPavel Machek
This adds warning when someone tries them from atomic context. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-25PM: no suspend_prepare() phaseDavid Brownell
Remove the new suspend_prepare() phase. It doesn't seem very usable, has never been tested, doesn't address fault cleanup, and would need a sibling resume_complete(); plus there are no real use cases. It could be restored later if those issues get resolved. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-25PM: add kconfig option for deprecated .../power/state filesDavid Brownell
Add a new PM_SYSFS_DEPRECATED config option to control whether or not the /sys/devices/.../power/state files are provided. This will make it easier to get rid of that mechanism when the time comes, and to verify that userspace tools work right without it. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-25PM: update docs for writing .../power/stateDavid Brownell
Updates to match current code: - Make writes to the /sys/devices/.../power/state files fail cleanly if the device requires the irqs-off call variants. - Fix comments describing the /sys/devices/.../power/state file writes to match the code; the last several releases have invalidated the previous text. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-25PM: issue PM_EVENT_PRETHAWDavid Brownell
This patch is the first of this series that should actually change any behavior ... by issuing the new event, now tha the rest of the kernel is prepared to receive it. This converts the PM core to issue the new PRETHAW message, which the rest of the kernel is now ready to receive. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-25make suspend quieterDavid Brownell
Fix a goof in Linus' recent PM API updates: don't emit any messages in the typical NOP "already suspended it" late suspend case. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-25Suspend infrastructure cleanup and extensionLinus Torvalds
Allow devices to participate in the suspend process more intimately, in particular, allow the final phase (with interrupts disabled) to also be open to normal devices, not just system devices. Also, allow classes to participate in device suspend. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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