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| | | * | PM / sleep: Move platform suspend operations to separate functionsRafael J. Wysocki2014-07-231-43/+77
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After the introduction of freeze_ops it makes more sense to move all of the platform suspend operations to separate functions that each will do all of the necessary checks and choose the right callback to execute istead of doing all that in the core code which makes it generally harder to follow. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| | | * | PM / sleep: Simplify sleep states sysfs interface codeRafael J. Wysocki2014-07-214-41/+31
| | | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Simplify the sleep states sysfs interface /sys/power/state code by redefining pm_states[] as an array of pointers to constant strings such that only the entries corresponding to valid states are set. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * | / PM: Create PM workqueue if runtime PM is not configured tooRafael J. Wysocki2014-07-231-4/+0
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | The PM workqueue is going to be used by ACPI PM notify handlers regardless of whether or not runtime PM is configured, so move it out of #ifdef CONFIG_PM_RUNTIME. Do that in three places in the ACPI device PM code. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | | Merge tag 'trace-3.17' of ↵Linus Torvalds2014-08-042-8/+0
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing updates from Steven Rostedt: "This pull request has a lot of work done. The main thing is the changes to the ftrace function callback infrastructure. It's introducing a way to allow different functions to call directly different trampolines instead of all calling the same "mcount" one. The only user of this for now is the function graph tracer, which always had a different trampoline, but the function tracer trampoline was called and did basically nothing, and then the function graph tracer trampoline was called. The difference now, is that the function graph tracer trampoline can be called directly if a function is only being traced by the function graph trampoline. If function tracing is also happening on the same function, the old way is still done. The accounting for this takes up more memory when function graph tracing is activated, as it needs to keep track of which functions it uses. I have a new way that wont take as much memory, but it's not ready yet for this merge window, and will have to wait for the next one. Another big change was the removal of the ftrace_start/stop() calls that were used by the suspend/resume code that stopped function tracing when entering into suspend and resume paths. The stop of ftrace was done because there was some function that would crash the system if one called smp_processor_id()! The stop/start was a big hammer to solve the issue at the time, which was when ftrace was first introduced into Linux. Now ftrace has better infrastructure to debug such issues, and I found the problem function and labeled it with "notrace" and function tracing can now safely be activated all the way down into the guts of suspend and resume Other changes include clean ups of uprobe code, clean up of the trace_seq() code, and other various small fixes and clean ups to ftrace and tracing" * tag 'trace-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (57 commits) ftrace: Add warning if tramp hash does not match nr_trampolines ftrace: Fix trampoline hash update check on rec->flags ring-buffer: Use rb_page_size() instead of open coded head_page size ftrace: Rename ftrace_ops field from trampolines to nr_trampolines tracing: Convert local function_graph functions to static ftrace: Do not copy old hash when resetting tracing: let user specify tracing_thresh after selecting function_graph ring-buffer: Always run per-cpu ring buffer resize with schedule_work_on() tracing: Remove function_trace_stop and HAVE_FUNCTION_TRACE_MCOUNT_TEST s390/ftrace: remove check of obsolete variable function_trace_stop arm64, ftrace: Remove check of obsolete variable function_trace_stop Blackfin: ftrace: Remove check of obsolete variable function_trace_stop metag: ftrace: Remove check of obsolete variable function_trace_stop microblaze: ftrace: Remove check of obsolete variable function_trace_stop MIPS: ftrace: Remove check of obsolete variable function_trace_stop parisc: ftrace: Remove check of obsolete variable function_trace_stop sh: ftrace: Remove check of obsolete variable function_trace_stop sparc64,ftrace: Remove check of obsolete variable function_trace_stop tile: ftrace: Remove check of obsolete variable function_trace_stop ftrace: x86: Remove check of obsolete variable function_trace_stop ...
| * | PM / Sleep: Remove ftrace_stop/start() from suspend and hibernateSteven Rostedt (Red Hat)2014-07-172-8/+0
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ftrace_stop() and ftrace_start() were added to the suspend and hibernate process because there was some function within the work flow that caused the system to reboot if it was traced. This function has recently been found (restore_processor_state()). Now there's no reason to disable function tracing while we are going into suspend or hibernate, which means that being able to trace this will help tremendously in debugging any issues with suspend or hibernate. This also means that the ftrace_stop/start() functions can be removed and simplify the function tracing code a bit. Link: http://lkml.kernel.org/r/1518201.VD9cU33jRU@vostro.rjw.lan Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* | PM / sleep: fix freeze_ops NULL pointer dereferencesZhang Rui2014-07-151-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a NULL pointer dereference issue introduced by commit 1f0b63866fc1 (ACPI / PM: Hold ACPI scan lock over the "freeze" sleep state). Fixes: 1f0b63866fc1 (ACPI / PM: Hold ACPI scan lock over the "freeze" sleep state) Link: http://marc.info/?l=linux-pm&m=140541182017443&w=2 Reported-and-tested-by: Alexander Stein <alexander.stein@systec-electronic.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | PM / sleep: Fix request_firmware() error at resumeTakashi Iwai2014-07-151-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit [247bc037: PM / Sleep: Mitigate race between the freezer and request_firmware()] introduced the finer state control, but it also leads to a new bug; for example, a bug report regarding the firmware loading of intel BT device at suspend/resume: https://bugzilla.novell.com/show_bug.cgi?id=873790 The root cause seems to be a small window between the process resume and the clear of usermodehelper lock. The request_firmware() function checks the UMH lock and gives up when it's in UMH_DISABLE state. This is for avoiding the invalid f/w loading during suspend/resume phase. The problem is, however, that usermodehelper_enable() is called at the end of thaw_processes(). Thus, a thawed process in between can kick off the f/w loader code path (in this case, via btusb_setup_intel()) even before the call of usermodehelper_enable(). Then usermodehelper_read_trylock() returns an error and request_firmware() spews WARN_ON() in the end. This oneliner patch fixes the issue just by setting to UMH_FREEZING state again before restarting tasks, so that the call of request_firmware() will be blocked until the end of this function instead of returning an error. Fixes: 247bc0374254 (PM / Sleep: Mitigate race between the freezer and request_firmware()) Link: https://bugzilla.novell.com/show_bug.cgi?id=873790 Cc: 3.4+ <stable@vger.kernel.org> # 3.4+ Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* x86, kaslr: boot-time selectable with hibernationKees Cook2014-06-161-0/+6
| | | | | | | | | | Changes kASLR from being compile-time selectable (blocked by CONFIG_HIBERNATION), to being boot-time selectable (with hibernation available by default) via the "kaslr" kernel command line. Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* PM / hibernate: introduce "nohibernate" boot parameterKees Cook2014-06-163-5/+35
| | | | | | | | | | | To support using kernel features that are not compatible with hibernation, this creates the "nohibernate" kernel boot parameter to disable both hibernation and resume. This allows hibernation support to be a boot-time choice instead of only a compile-time choice. Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* Merge branch 'pm-sleep'Rafael J. Wysocki2014-06-123-2/+18
|\ | | | | | | | | | | * pm-sleep: PM / sleep: trace events for device PM callbacks PM / sleep: trace events for suspend/resume
| * PM / sleep: trace events for suspend/resumeTodd E Brandt2014-06-073-2/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds trace events that give finer resolution into suspend/resume. These events are graphed in the timelines generated by the analyze_suspend.py script. They represent large areas of time consumed that are typical to suspend and resume. The event is triggered by calling the function "trace_suspend_resume" with three arguments: a string (the name of the event to be displayed in the timeline), an integer (case specific number, such as the power state or cpu number), and a boolean (where true is used to denote the start of the timeline event, and false to denote the end). The suspend_resume trace event reproduces the data that the machine_suspend trace event did, so the latter has been removed. Signed-off-by: Todd Brandt <todd.e.brandt@intel.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * Merge branch 'acpi-pm' into pm-sleepRafael J. Wysocki2014-06-072-1/+16
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*---. \ \ Merge branches 'pnp', 'powercap', 'pm-runtime' and 'pm-opp'Rafael J. Wysocki2014-06-031-2/+1
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * pnp: MAINTAINERS: Remove Bjorn Helgaas as PNP maintainer PNP / resources: remove positive test on unsigned values * powercap: powercap / RAPL: add new CPU IDs powercap / RAPL: further relax energy counter checks * pm-runtime: PM / runtime: Update documentation to reflect the current code flow * pm-opp: PM / OPP: discard duplicate OPPs PM / OPP: Make OPP invisible to users in Kconfig PM / OPP: fix incorrect OPP count handling in of_init_opp_table
| | | * | | PM / OPP: Make OPP invisible to users in KconfigMark Brown2014-05-191-2/+1
| | |/ / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The OPP code is an in kernel library selected by its users, there is no no architecture code required to implement it and enabling it without a user just increases the kernel size. Since the users select rather than depend on it just remove the ability to directly set the option from Kconfig. Signed-off-by: Mark Brown <broonie@linaro.org> Acked-by: Nishanth Menon <nm@ti.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | | | | Merge branch 'acpi-pm'Rafael J. Wysocki2014-06-031-0/+15
|\ \ \ \ \ | | |_|_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | * acpi-pm: ACPI / PM: Export rest of the subsys PM callbacks ACPI / PM: Avoid resuming devices in ACPI PM domain during system suspend ACPI / PM: Hold ACPI scan lock over the "freeze" sleep state ACPI / PM: Export acpi_target_system_state() to modules
| * | | | Merge branch 'pm-sleep' into acpi-pmRafael J. Wysocki2014-05-202-9/+20
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| * | | | | ACPI / PM: Hold ACPI scan lock over the "freeze" sleep stateRafael J. Wysocki2014-05-161-0/+15
| | |/ / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The "freeze" sleep state suffers from the same issue that was addressed by commit ad07277e82de (ACPI / PM: Hold acpi_scan_lock over system PM transitions) for ACPI sleep states, that is, things break if ->remove() is called for devices whose system resume callbacks haven't been executed yet. It also can be addressed in the same way, by holding the ACPI scan lock over the "freeze" sleep state and PM transitions to and from that state, but ->begin() and ->end() platform operations for the "freeze" sleep state are needed for this purpose. This change has been tested on Acer Aspire S5 with Thunderbolt. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | | | | Merge branch 'pm-sleep'Rafael J. Wysocki2014-06-036-75/+114
|\ \ \ \ \ | | |_|_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * pm-sleep: PM / hibernate: fixed typo in comment PM / sleep: unregister wakeup source when disabling device wakeup PM / sleep: Introduce command line argument for sleep state enumeration PM / sleep: Use valid_state() for platform-dependent sleep states only PM / sleep: Add state field to pm_states[] entries PM / sleep: Update device PM documentation to cover direct_complete PM / sleep: Mechanism to avoid resuming runtime-suspended devices unnecessarily PM / hibernate: Fix memory corruption in resumedelay_setup() PM / hibernate: convert simple_strtoul to kstrtoul PM / hibernate: Documentation: Fix script for unswapping PM / hibernate: no kernel_power_off when pm_power_off NULL PM / hibernate: use unsigned local variables in swsusp_show_speed()
| * | | | PM / hibernate: fixed typo in commentNiv Yehezkel2014-06-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a trivial comment typo (s/mam/map) in kernel/power/swap.c. Signed-off-by: Niv Yehezkel <executerx@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * | | | PM / sleep: Introduce command line argument for sleep state enumerationRafael J. Wysocki2014-05-262-8/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On some systems the platform doesn't support neither PM_SUSPEND_MEM nor PM_SUSPEND_STANDBY, so PM_SUSPEND_FREEZE is the only available system sleep state. However, some user space frameworks only use the "mem" and (sometimes) "standby" sleep state labels, so the users of those systems need to modify user space in order to be able to use system suspend at all and that is not always possible. For this reason, add a new kernel command line argument, relative_sleep_states, allowing the users of those systems to change the way in which the kernel assigns labels to system sleep states. Namely, for relative_sleep_states=1, the "mem", "standby" and "freeze" labels will enumerate the available system sleem states from the deepest to the shallowest, respectively, so that "mem" is always present in /sys/power/state and the other state strings may or may not be presend depending on what is supported by the platform. Update system sleep states documentation to reflect this change. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * | | | PM / sleep: Use valid_state() for platform-dependent sleep states onlyRafael J. Wysocki2014-05-264-37/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the observation that, for platform-dependent sleep states (PM_SUSPEND_STANDBY, PM_SUSPEND_MEM), a given state is either always supported or always unsupported and store that information in pm_states[] instead of calling valid_state() every time we need to check it. Also do not use valid_state() for PM_SUSPEND_FREEZE, which is always valid, and move the pm_test_level validity check for PM_SUSPEND_FREEZE directly into enter_state(). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * | | | PM / sleep: Add state field to pm_states[] entriesRafael J. Wysocki2014-05-264-27/+30
| | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To allow sleep states corresponding to the "mem", "standby" and "freeze" lables to be different from the pm_states[] indexes of those strings, introduce struct pm_sleep_state, consisting of a string label and a state number, and turn pm_states[] into an array of objects of that type. This modification should not lead to any functional changes. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * | | PM / hibernate: Fix memory corruption in resumedelay_setup()Dan Carpenter2014-05-161-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the original code "resume_delay" is an int so on 64 bits, the call to kstrtoul() will cause memory corruption. We may as well fix a style issue here as well and make "resume_delay" unsigned int, since that's what we pass to ssleep(). Fixes: 317cf7e5e85e (PM / hibernate: convert simple_strtoul to kstrtoul) Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * | | PM / hibernate: convert simple_strtoul to kstrtoulFabian Frederick2014-05-091-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace obsolete function. Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * | | Merge branch 'pm-cpuidle' into pm-sleepRafael J. Wysocki2014-05-071-0/+2
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| * | | | PM / hibernate: no kernel_power_off when pm_power_off NULLSebastian Capella2014-05-011-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reboot logic in kernel/reboot will avoid calling kernel_power_off when pm_power_off is null, and instead uses kernel_halt. Change hibernate's power_down to follow the behavior in the reboot call. Calling the notifier twice (once for SYS_POWER_OFF and again for SYS_HALT) causes a panic during hibernation on Kirkwood Openblocks A6 board. Signed-off-by: Sebastian Capella <sebastian.capella@linaro.org> Reported-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Reviewed-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * | | | PM / hibernate: use unsigned local variables in swsusp_show_speed()Chen Gang2014-04-281-5/+9
| | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | do_div() needs 'u64' type, or it reports warning. And negative number is meaningless for "speed", so change all signed to unsigned within swsusp_show_speed(). The related warning (with allmodconfig for unicore32): CC kernel/power/hibernate.o kernel/power/hibernate.c: In function ‘swsusp_show_speed’: kernel/power/hibernate.c:237: warning: comparison of distinct pointer types lacks a cast Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> [rjw: Subject] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | | | Merge branch 'pm-cpuidle'Rafael J. Wysocki2014-06-031-0/+2
|\ \ \ \ | | |/ / | |/| / | |_|/ |/| | | | | | | | | | | | | | * pm-cpuidle: PM / suspend: Always use deepest C-state in the "freeze" sleep state cpuidle / menu: move repeated correction factor check to init cpuidle / menu: Return (-1) if there are no suitable states cpuidle: Combine cpuidle_enabled() with cpuidle_select() ARM: clps711x: Add cpuidle driver
| * | PM / suspend: Always use deepest C-state in the "freeze" sleep stateRafael J. Wysocki2014-05-071-0/+2
| |/ | | | | | | | | | | | | | | | | | | | | If freeze_enter() is called, we want to bypass the current cpuidle governor and always use the deepest available (that is, not disabled) C-state, because we want to save as much energy as reasonably possible then and runtime latency constraints don't matter at that point, since the system is in a sleep state anyway. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Aubrey Li <aubrey.li@linux.intel.com>
* / asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/*Andi Kleen2014-05-051-1/+1
|/ | | | | | | | | | | As requested by Linus add explicit __visible to the asmlinkage users. This marks functions visible to assembler. Tree sweep for rest of tree. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1398984278-29319-4-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* PM / suspend: Make cpuidle work in the "freeze" stateRafael J. Wysocki2014-04-211-0/+3
| | | | | | | | | | | | | | | | | The "freeze" system sleep state introduced by commit 7e73c5ae6e79 (PM: Introduce suspend state PM_SUSPEND_FREEZE) requires cpuidle to be functional when freeze_enter() is executed to work correctly (that is, to be able to save any more energy than runtime idle), but that is impossible after commit 8651f97bd951d (PM / cpuidle: System resume hang fix with cpuidle) which caused cpuidle to be paused in dpm_suspend_noirq() and resumed in dpm_resume_noirq(). To avoid that problem, add cpuidle_resume() and cpuidle_pause() to the beginning and the end of freeze_enter(), respectively. Reported-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
* kernel: use macros from compiler.h instead of __attribute__((...))Gideon Israel Dsouza2014-04-074-5/+8
| | | | | | | | | | | | | To increase compiler portability there is <linux/compiler.h> which provides convenience macros for various gcc constructs. Eg: __weak for __attribute__((weak)). I've replaced all instances of gcc attributes with the right macro in the kernel subsystem. Signed-off-by: Gideon Israel Dsouza <gidisrael@gmail.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
*-. Merge branches 'pm-runtime' and 'pm-sleep'Rafael J. Wysocki2014-03-206-14/+20
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * pm-runtime: PM / Runtime: Update runtime_idle() documentation for return value meaning * pm-sleep: PM / sleep: Correct whitespace errors in <linux/pm.h> PM: Add missing "freeze" state PM / Hibernate: Spelling s/anonymouns/anonymous/ PM / Runtime: Add missing "it" in comment PM / suspend: Remove unnecessary !! PCI / PM: Resume runtime-suspended devices later during system suspend ACPI / PM: Resume runtime-suspended devices later during system suspend PM / sleep: Set pm_generic functions to NULL for !CONFIG_PM_SLEEP PM: fix typo in comment PM / hibernate: use name_to_dev_t to parse resume PM / wakeup: Include appropriate header file in kernel/power/wakelock.c PM / sleep: Move prototype declaration to header file kernel/power/power.h PM / sleep: Asynchronous threads for suspend_late PM / sleep: Asynchronous threads for suspend_noirq PM / sleep: Asynchronous threads for resume_early PM / sleep: Asynchronous threads for resume_noirq PM / sleep: Two flags for async suspend_noirq and suspend_late
| | * PM: Add missing "freeze" stateGeert Uytterhoeven2014-03-121-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix descriptions of /sys/power/state in the documentation and in a code comment. Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Acked-by: Pavel Machek <pavel@ucw.cz> [rjw: Changelog] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| | * PM / Hibernate: Spelling s/anonymouns/anonymous/Geert Uytterhoeven2014-03-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Spelling fix. Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| | * PM / suspend: Remove unnecessary !!Viresh Kumar2014-03-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Double ! or !! are normally required to get 0 or 1 out of a expression. A comparision always returns 0 or 1 and hence there is no need to apply double ! over it again. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| | * PM / hibernate: use name_to_dev_t to parse resumeSebastian Capella2014-03-011-10/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the name_to_dev_t call to parse the device name echo'd to to /sys/power/resume. This imitates the method used in hibernate.c in software_resume, and allows the resume partition to be specified using other equivalent device formats as well. By allowing /sys/debug/resume to accept the same syntax as the resume=device parameter, we can parse the resume=device in the init script and use the resume device directly from the kernel command line. Signed-off-by: Sebastian Capella <sebastian.capella@linaro.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| | * PM / wakeup: Include appropriate header file in kernel/power/wakelock.cRashika Kheria2014-03-011-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Include appropriate header file kernel/power/power.h in kernel/power/wakelock.c because it has prototype declaration of function defined in kernel/power/wakelock.c. This eliminates the following warning in kernel/power/wakelock.c: kernel/power/wakelock.c:34:9: warning: no previous prototype for ‘pm_show_wakelocks’ [-Wmissing-prototypes] kernel/power/wakelock.c:184:5: warning: no previous prototype for ‘pm_wake_lock’ [-Wmissing-prototypes] kernel/power/wakelock.c:232:5: warning: no previous prototype for ‘pm_wake_unlock’ [-Wmissing-prototypes] Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| | * PM / sleep: Move prototype declaration to header file kernel/power/power.hRashika Kheria2014-03-011-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move prototype declaration of function to header file kernel/power/power.h because it is used by more than one file. This eliminates the following warning in kernel/power/snapshot.c: kernel/power/snapshot.c:1588:16: warning: no previous prototype for ‘swsusp_save’ [-Wmissing-prototypes] Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | | Merge branches 'pm-qos', 'pm-domains' and 'pm-drivers'Rafael J. Wysocki2014-03-201-6/+12
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * pm-qos: PM / QoS: Add type to dev_pm_qos_add_ancestor_request() arguments ACPI / LPSS: Support for device latency tolerance PM QoS ACPI / scan: Add bind/unbind callbacks to struct acpi_scan_handler PM / QoS: Introcuce latency tolerance device PM QoS type PM / QoS: Add no_constraints_value field to struct pm_qos_constraints PM / QoS: Rename device resume latency QoS items * pm-domains: PM / domains: Turn latency warning into debug message * pm-drivers: PM: Add pm_runtime_suspend|resume_force functions PM / runtime: Fetch runtime PM callbacks using a macro
| * | PM / QoS: Introcuce latency tolerance device PM QoS typeRafael J. Wysocki2014-02-111-5/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new latency tolerance device PM QoS type to be use for specifying active state (RPM_ACTIVE) memory access (DMA) latency tolerance requirements for devices. It may be used to prevent hardware from choosing overly aggressive energy-saving operation modes (causing too much latency to appear) for the whole platform. This feature reqiures hardware support, so it only will be available for devices having a new .set_latency_tolerance() callback in struct dev_pm_info populated, in which case the routine pointed to by it should implement whatever is necessary to transfer the effective requirement value to the hardware. Whenever the effective latency tolerance changes for the device, its .set_latency_tolerance() callback will be executed and the effective value will be passed to it. If that value is negative, which means that the list of latency tolerance requirements for the device is empty, the callback is expected to switch the underlying hardware latency tolerance control mechanism to an autonomous mode if available. If that value is PM_QOS_LATENCY_ANY, in turn, and the hardware supports a special "no requirement" setting, the callback is expected to use it. That allows software to prevent the hardware from automatically updating the device's latency tolerance in response to its power state changes (e.g. during transitions from D3cold to D0), which generally may be done in the autonomous latency tolerance control mode. If .set_latency_tolerance() is present for the device, a new pm_qos_latency_tolerance_us attribute will be present in the devivce's power directory in sysfs. Then, user space can use that attribute to specify its latency tolerance requirement for the device, if any. Writing "any" to it means "no requirement, but do not let the hardware control latency tolerance" and writing "auto" to it allows the hardware to be switched to the autonomous mode if there are no other requirements from the kernel side in the device's list. This changeset includes a fix from Mika Westerberg. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * | PM / QoS: Add no_constraints_value field to struct pm_qos_constraintsRafael J. Wysocki2014-02-111-1/+4
| |/ | | | | | | | | | | | | | | | | | | | | | | | | Add a new field, no_constraints_value, to struct pm_qos_constraints representing a list of PM QoS constraint requests to be returned by pm_qos_get_value() when that list of requests is empty. That field will be equal to default_value for all of the existing global PM QoS classes and for the resume latency device PM QoS type, but it will be different from default_value for the new latency tolerance device PM QoS type introduced by the next changeset. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* / arm, pm, vmpressure: add missing slab.h includesTejun Heo2014-02-031-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | arch/arm/mach-tegra/pm.c, kernel/power/console.c and mm/vmpressure.c were somehow getting slab.h indirectly through cgroup.h which in turn was getting it indirectly through xattr.h. A scheduled cgroup change drops xattr.h inclusion from cgroup.h and breaks compilation of these three files. Add explicit slab.h includes to the three files. A pending cgroup patch depends on this change and it'd be great if this can be routed through cgroup/for-3.14-fixes branch. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: linux-tegra@vger.kernel.org Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: linux-pm@vger.kernel.org Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Balbir Singh <bsingharora@gmail.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: cgroups@vger.kernel.org
* Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-blockLinus Torvalds2014-01-301-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull core block IO changes from Jens Axboe: "The major piece in here is the immutable bio_ve series from Kent, the rest is fairly minor. It was supposed to go in last round, but various issues pushed it to this release instead. The pull request contains: - Various smaller blk-mq fixes from different folks. Nothing major here, just minor fixes and cleanups. - Fix for a memory leak in the error path in the block ioctl code from Christian Engelmayer. - Header export fix from CaiZhiyong. - Finally the immutable biovec changes from Kent Overstreet. This enables some nice future work on making arbitrarily sized bios possible, and splitting more efficient. Related fixes to immutable bio_vecs: - dm-cache immutable fixup from Mike Snitzer. - btrfs immutable fixup from Muthu Kumar. - bio-integrity fix from Nic Bellinger, which is also going to stable" * 'for-3.14/core' of git://git.kernel.dk/linux-block: (44 commits) xtensa: fixup simdisk driver to work with immutable bio_vecs block/blk-mq-cpu.c: use hotcpu_notifier() blk-mq: for_each_* macro correctness block: Fix memory leak in rw_copy_check_uvector() handling bio-integrity: Fix bio_integrity_verify segment start bug block: remove unrelated header files and export symbol blk-mq: uses page->list incorrectly blk-mq: use __smp_call_function_single directly btrfs: fix missing increment of bi_remaining Revert "block: Warn and free bio if bi_end_io is not set" block: Warn and free bio if bi_end_io is not set blk-mq: fix initializing request's start time block: blk-mq: don't export blk_mq_free_queue() block: blk-mq: make blk_sync_queue support mq block: blk-mq: support draining mq queue dm cache: increment bi_remaining when bi_end_io is restored block: fixup for generic bio chaining block: Really silence spurious compiler warnings block: Silence spurious compiler warnings block: Kill bio_pair_split() ...
| * Merge tag 'v3.13-rc6' into for-3.14/coreJens Axboe2013-12-311-0/+1
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Needed to bring blk-mq uptodate, since changes have been going in since for-3.14/core was established. Fixup merge issues related to the immutable biovec changes. Signed-off-by: Jens Axboe <axboe@kernel.dk> Conflicts: block/blk-flush.c fs/btrfs/check-integrity.c fs/btrfs/extent_io.c fs/btrfs/scrub.c fs/logfs/dev_bdev.c
| * | block: Abstract out bvec iteratorKent Overstreet2013-11-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Immutable biovecs are going to require an explicit iterator. To implement immutable bvecs, a later patch is going to add a bi_bvec_done member to this struct; for now, this patch effectively just renames things. Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Ed L. Cashin" <ecashin@coraid.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Geoff Levand <geoff@infradead.org> Cc: Yehuda Sadeh <yehuda@inktank.com> Cc: Sage Weil <sage@inktank.com> Cc: Alex Elder <elder@inktank.com> Cc: ceph-devel@vger.kernel.org Cc: Joshua Morris <josh.h.morris@us.ibm.com> Cc: Philip Kelleher <pjk1939@linux.vnet.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Neil Brown <neilb@suse.de> Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: dm-devel@redhat.com Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Cc: Boaz Harrosh <bharrosh@panasas.com> Cc: Benny Halevy <bhalevy@tonian.com> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Chris Mason <chris.mason@fusionio.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: Jaegeuk Kim <jaegeuk.kim@samsung.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Dave Kleikamp <shaggy@kernel.org> Cc: Joern Engel <joern@logfs.org> Cc: Prasad Joshi <prasadjoshi.linux@gmail.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: KONISHI Ryusuke <konishi.ryusuke@lab.ntt.co.jp> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Ben Myers <bpm@sgi.com> Cc: xfs@oss.sgi.com Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Len Brown <len.brown@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Guo Chao <yan@linux.vnet.ibm.com> Cc: Tejun Heo <tj@kernel.org> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: "Roger Pau Monné" <roger.pau@citrix.com> Cc: Jan Beulich <jbeulich@suse.com> Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Cc: Ian Campbell <Ian.Campbell@citrix.com> Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Jerome Marchand <jmarchand@redhat.com> Cc: Joe Perches <joe@perches.com> Cc: Peng Tao <tao.peng@emc.com> Cc: Andy Adamson <andros@netapp.com> Cc: fanchaoting <fanchaoting@cn.fujitsu.com> Cc: Jie Liu <jeff.liu@oracle.com> Cc: Sunil Mushran <sunil.mushran@gmail.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Namjae Jeon <namjae.jeon@samsung.com> Cc: Pankaj Kumar <pankaj.km@samsung.com> Cc: Dan Magenheimer <dan.magenheimer@oracle.com> Cc: Mel Gorman <mgorman@suse.de>6
* | | Merge tag 'pm+acpi-3.14-rc1' of ↵Linus Torvalds2014-01-241-3/+4
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI and power management updates from Rafael Wysocki: "As far as the number of commits goes, the top spot belongs to ACPI this time with cpufreq in the second position and a handful of PM core, PNP and cpuidle updates. They are fixes and cleanups mostly, as usual, with a couple of new features in the mix. The most visible change is probably that we will create struct acpi_device objects (visible in sysfs) for all devices represented in the ACPI tables regardless of their status and there will be a new sysfs attribute under those objects allowing user space to check that status via _STA. Consequently, ACPI device eject or generally hot-removal will not delete those objects, unless the table containing the corresponding namespace nodes is unloaded, which is extremely rare. Also ACPI container hotplug will be handled quite a bit differently and cpufreq will support CPU boost ("turbo") generically and not only in the acpi-cpufreq driver. Specifics: - ACPI core changes to make it create a struct acpi_device object for every device represented in the ACPI tables during all namespace scans regardless of the current status of that device. In accordance with this, ACPI hotplug operations will not delete those objects, unless the underlying ACPI tables go away. - On top of the above, new sysfs attribute for ACPI device objects allowing user space to check device status by triggering the execution of _STA for its ACPI object. From Srinivas Pandruvada. - ACPI core hotplug changes reducing code duplication, integrating the PCI root hotplug with the core and reworking container hotplug. - ACPI core simplifications making it use ACPI_COMPANION() in the code "glueing" ACPI device objects to "physical" devices. - ACPICA update to upstream version 20131218. This adds support for the DBG2 and PCCT tables to ACPICA, fixes some bugs and improves debug facilities. From Bob Moore, Lv Zheng and Betty Dall. - Init code change to carry out the early ACPI initialization earlier. That should allow us to use ACPI during the timekeeping initialization and possibly to simplify the EFI initialization too. From Chun-Yi Lee. - Clenups of the inclusions of ACPI headers in many places all over from Lv Zheng and Rashika Kheria (work in progress). - New helper for ACPI _DSM execution and rework of the code in drivers that uses _DSM to execute it via the new helper. From Jiang Liu. - New Win8 OSI blacklist entries from Takashi Iwai. - Assorted ACPI fixes and cleanups from Al Stone, Emil Goode, Hanjun Guo, Lan Tianyu, Masanari Iida, Oliver Neukum, Prarit Bhargava, Rashika Kheria, Tang Chen, Zhang Rui. - intel_pstate driver updates, including proper Baytrail support, from Dirk Brandewie and intel_pstate documentation from Ramkumar Ramachandra. - Generic CPU boost ("turbo") support for cpufreq from Lukasz Majewski. - powernow-k6 cpufreq driver fixes from Mikulas Patocka. - cpufreq core fixes and cleanups from Viresh Kumar, Jane Li, Mark Brown. - Assorted cpufreq drivers fixes and cleanups from Anson Huang, John Tobias, Paul Bolle, Paul Walmsley, Sachin Kamat, Shawn Guo, Viresh Kumar. - cpuidle cleanups from Bartlomiej Zolnierkiewicz. - Support for hibernation APM events from Bin Shi. - Hibernation fix to avoid bringing up nonboot CPUs with ACPI EC disabled during thaw transitions from Bjørn Mork. - PM core fixes and cleanups from Ben Dooks, Leonardo Potenza, Ulf Hansson. - PNP subsystem fixes and cleanups from Dmitry Torokhov, Levente Kurusa, Rashika Kheria. - New tool for profiling system suspend from Todd E Brandt and a cpupower tool cleanup from One Thousand Gnomes" * tag 'pm+acpi-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (153 commits) thermal: exynos: boost: Automatic enable/disable of BOOST feature (at Exynos4412) cpufreq: exynos4x12: Change L0 driver data to CPUFREQ_BOOST_FREQ Documentation: cpufreq / boost: Update BOOST documentation cpufreq: exynos: Extend Exynos cpufreq driver to support boost cpufreq / boost: Kconfig: Support for software-managed BOOST acpi-cpufreq: Adjust the code to use the common boost attribute cpufreq: Add boost frequency support in core intel_pstate: Add trace point to report internal state. cpufreq: introduce cpufreq_generic_get() routine ARM: SA1100: Create dummy clk_get_rate() to avoid build failures cpufreq: stats: create sysfs entries when cpufreq_stats is a module cpufreq: stats: free table and remove sysfs entry in a single routine cpufreq: stats: remove hotplug notifiers cpufreq: stats: handle cpufreq_unregister_driver() and suspend/resume properly cpufreq: speedstep: remove unused speedstep_get_state platform: introduce OF style 'modalias' support for platform bus PM / tools: new tool for suspend/resume performance optimization ACPI: fix module autoloading for ACPI enumerated devices ACPI: add module autoloading support for ACPI enumerated devices ACPI: fix create_modalias() return value handling ...
| * | | PM / hibernate: Call platform_leave() in suspend path tooBjørn Mork2014-01-061-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since create_image() only executes platform_leave() if in_suspend is not set, enable_nonboot_cpus() is run by it with EC transactions blocked (on ACPI systems) in the image creation code path (that is, for in_suspend set), which may cause CPU online to fail for the CPUs in question. In particular, this causes the acpi_cpufreq driver's initialization to fail for those CPUs on some systems with the following dmesg: cpufreq: adding CPU 1 acpi_cpufreq_cpu_init cpufreq: FREQ: 1401000 - CPU: 0 ACPI Exception: AE_BAD_PARAMETER, Returned by Handler for [EmbeddedControl] (20130725/evregion-287) ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPC_.EC__.LPMD] (Node ffff88023249ab28), AE_BAD_PARAMETER (20130725/psparse-536) ACPI Error: Method parse/execution failed [\_PR_.CPU0._PPC] (Node ffff88023270e3f8), AE_BAD_PARAMETER (20130725/psparse-536) ACPI Error: Method parse/execution failed [\_PR_.CPU1._PPC] (Node ffff88023270e290), AE_BAD_PARAMETER (20130725/psparse-536) ACPI Exception: AE_BAD_PARAMETER, Evaluating _PPC (20130725/processor_perflib-140) cpufreq: initialization failed CPU1 is up To fix this problem, modify create_image() to execute platform_leave() unconditionally. [rjw: This shouldn't lead to any significant side effects on ACPI systems.] Signed-off-by: Bjørn Mork <bjorn@mork.no> [rjw: Changelog] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * | | Merge back earlier 'pm-sleep' material.Rafael J. Wysocki2013-12-301-0/+1
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| * | | PM / hibernate: export hibernation_set_opsLeonardo Potenza2013-11-301-0/+1
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To support the ability to implement PM hibernation code as modules the hibernation_set_ops function requires to be exported. Similar solution already available for suspend_set_ops (please refer to commit a5e4fd8783a2bec861ecf1138cdc042269ff59aa). Signed-off-by: Leonardo Potenza <leonardo.potenza@intel.com> Signed-off-by: Edwin Verplanke <edwin.verplanke@intel.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>