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  1. 27 2月, 2010 2 次提交
  3. 12 1月, 2010 1 次提交
  5. 23 12月, 2009 1 次提交
    • R
      PM / Runtime: Use device type and device class callbacks · a6ab7aa9
      由 Rafael J. Wysocki 提交于 
      The power management of some devices is handled through device types
and device classes rather than through bus types.  Since these
devices may also benefit from using the run-time power management
core, extend it so that the device type and device class run-time PM
callbacks can be taken into consideration by it if the bus type
callback is not defined.

Update the run-time PM core documentation to reflect this change.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      a6ab7aa9
  7. 21 12月, 2009 1 次提交
    • A
      PM: Use pm_runtime_put_sync in system resume · aa0baaef
      由 Alan Stern 提交于 
      This patch (as1317) fixes a bug in the PM core.  When a device is
resumed following a system sleep, the core decrements the device's
runtime PM usage counter but doesn't issue an idle notification if the
counter reaches 0.  This could prevent an otherwise unused device from
being runtime-suspended again after the system sleep.

The fix is to call pm_runtime_put_sync() instead of
pm_runtime_put_noidle().
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      aa0baaef
  9. 18 12月, 2009 2 次提交
    • R
      PM: Measure device suspend and resume times · ecf762b2
      由 Rafael J. Wysocki 提交于 
      Measure and print the time of suspending and resuming all devices.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      ecf762b2
    • R
      PM: Make the initcall_debug style timing for suspend/resume complete · 875ab0b7
      由 Rafael J. Wysocki 提交于 
      Commit f2511774
(PM: Add initcall_debug style timing for suspend/resume) introduced
basic timing instrumentation, needed for a scritps/bootgraph.pl
equivalent or humans, but it missed the fact that bus types and
device classes which haven't been switched to using struct dev_pm_ops
objects yet need special handling.  As a result, the suspend/resume
timing information is only available for devices whose bus types or
device classes use struct dev_pm_ops objects, so the majority of
devices is not covered.

Fix this by adding basic suspend/resume timing instrumentation for
devices whose bus types and device classes still don't use struct
dev_pm_ops objects for power management.  To reduce code duplication
move the timing code to helper functions.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      875ab0b7
  11. 16 12月, 2009 4 次提交
  13. 06 12月, 2009 4 次提交
  15. 29 11月, 2009 1 次提交
    • A
      PM: fix irq enable/disable in runtime PM code · 862f89b3
      由 Alan Stern 提交于 
      This patch (as1305) fixes a bug in the irq-enable settings and removes
some related overhead in the runtime PM code.

	In __pm_runtime_resume(), within the scope of the original
	spin_lock_irq(), we know that irqs are disabled.  There's no
	reason to go through a pair of enable/disable cycles when
	acquiring and releasing the parent's lock.

	In __pm_runtime_set_status(), irqs are already disabled when
	the parent's lock is acquired, and they must remain disabled
	when it is released.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      862f89b3
  17. 03 11月, 2009 2 次提交
  19. 15 9月, 2009 2 次提交
  21. 23 8月, 2009 1 次提交
    • R
      PM: Introduce core framework for run-time PM of I/O devices (rev. 17) · 5e928f77
      由 Rafael J. Wysocki 提交于 
      Introduce a core framework for run-time power management of I/O
devices.  Add device run-time PM fields to 'struct dev_pm_info'
and device run-time PM callbacks to 'struct dev_pm_ops'.  Introduce
a run-time PM workqueue and define some device run-time PM helper
functions at the core level.  Document all these things.

Special thanks to Alan Stern for his help with the design and
multiple detailed reviews of the pereceding versions of this patch
and to Magnus Damm for testing feedback.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NMagnus Damm <damm@igel.co.jp>
      5e928f77
  23. 25 7月, 2009 1 次提交
  25. 24 7月, 2009 1 次提交
  27. 08 7月, 2009 1 次提交
  29. 13 6月, 2009 4 次提交
  31. 25 5月, 2009 1 次提交
    • R
      PM: Do not hold dpm_list_mtx while disabling/enabling nonboot CPUs · 32bdfac5
      由 Rafael J. Wysocki 提交于 
      We shouldn't hold dpm_list_mtx while executing
[disable|enable]_nonboot_cpus(), because theoretically this may lead
to a deadlock as shown by the following example (provided by Johannes
Berg):

CPU 3       CPU 2                     CPU 1
                                      suspend/hibernate
            something:
            rtnl_lock()               device_pm_lock()
                                       -> mutex_lock(&dpm_list_mtx)

            mutex_lock(&dpm_list_mtx)

linkwatch_work
 -> rtnl_lock()
                                      disable_nonboot_cpus()
                                       -> flush CPU 3 workqueue

Fortunately, device drivers are supposed to stop any activities that
might lead to the registration of new device objects way before
disable_nonboot_cpus() is called, so it shouldn't be necessary to
hold dpm_list_mtx over the entire late part of device suspend and
early part of device resume.

Thus, during the late suspend and the early resume of devices acquire
dpm_list_mtx only when dpm_list is going to be traversed and release
it right after that.

This patch is reported to fix the regressions tracked as
http://bugzilla.kernel.org/show_bug.cgi?id=13245.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Reported-by: NMiles Lane <miles.lane@gmail.com>
Tested-by: NMing Lei <tom.leiming@gmail.com>
      32bdfac5
  33. 31 3月, 2009 1 次提交
    • R
      PM: Rework handling of interrupts during suspend-resume · 2ed8d2b3
      由 Rafael J. Wysocki 提交于 
      Use the functions introduced in by the previous patch,
suspend_device_irqs(), resume_device_irqs() and check_wakeup_irqs(),
to rework the handling of interrupts during suspend (hibernation) and
resume.  Namely, interrupts will only be disabled on the CPU right
before suspending sysdevs, while device drivers will be prevented
from receiving interrupts, with the help of the new helper function,
before their "late" suspend callbacks run (and analogously during
resume).

In addition, since the device interrups are now disabled before the
CPU has turned all interrupts off and the CPU will ACK the interrupts
setting the IRQ_PENDING bit for them, check in sysdev_suspend() if
any wake-up interrupts are pending and abort suspend if that's the
case.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NIngo Molnar <mingo@elte.hu>
      2ed8d2b3
  35. 25 3月, 2009 1 次提交
  37. 23 2月, 2009 1 次提交
  39. 07 1月, 2009 2 次提交
  41. 17 10月, 2008 2 次提交
  43. 12 10月, 2008 1 次提交
  45. 07 9月, 2008 1 次提交
    • J
      x86: check for and defend against BIOS memory corruption · 5394f80f
      由 Jeremy Fitzhardinge 提交于 
      Some BIOSes have been observed to corrupt memory in the low 64k.  This
change:
 - Reserves all memory which does not have to be in that area, to
   prevent it from being used as general memory by the kernel.  Things
   like the SMP trampoline are still in the memory, however.
 - Clears the reserved memory so we can observe changes to it.
 - Adds a function check_for_bios_corruption() which checks and reports on
   memory becoming unexpectedly non-zero.  Currently it's called in the
   x86 fault handler, and the powermanagement debug output.
Signed-off-by: NJeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      5394f80f
  47. 22 8月, 2008 2 次提交