linux-stable.git/drivers/base/power, branch v4.6.2

PM / sleep: Handle failures in device_suspend_late() consistently

2016-06-08T01:23:42+00:00

commit 3a17fb329da68cb00558721aff876a80bba2fdb9 upstream.

Grygorii Strashko reports:

 The PM runtime will be left disabled for the device if its
 .suspend_late() callback fails and async suspend is not allowed
 for this device. In this case device will not be added in
 dpm_late_early_list and dpm_resume_early() will ignore this
 device, as result PM runtime will be disabled for it forever
 (side effect: after 8 subsequent failures for the same device
 the PM runtime will be reenabled due to disable_depth overflow).

To fix this problem, add devices to dpm_late_early_list regardless
of whether or not device_suspend_late() returns errors for them.

That will ensure failures in there to be handled consistently for
all devices regardless of their async suspend/resume status.

Reported-by: Grygorii Strashko 
Tested-by: Grygorii Strashko 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

PM / Runtime: Fix error path in pm_runtime_force_resume()

2016-06-08T01:23:37+00:00

commit 0ae3aeefabbeef26294e7a349b51f1c761d46c9f upstream.

As pm_runtime_set_active() may fail because the device's parent isn't
active, we can end up executing the ->runtime_resume() callback for the
device when it isn't allowed.

Fix this by invoking pm_runtime_set_active() before running the callback
and let's also deal with the error code.

Fixes: 37f204164dfb (PM: Add pm_runtime_suspend|resume_force functions)
Signed-off-by: Ulf Hansson 
Reviewed-by: Linus Walleij 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

PM / OPP: Remove useless check

2016-05-04T23:42:19+00:00

Regulators are optional for devices using OPPs and the OPP core
shouldn't be printing any errors for such missing regulators.

It was fine before the commit 0c717d0f9cb4, but that failed to update
this part of the code to remove an 'always true' check and an extra
unwanted print message.

Fix that now.

Fixes: 0c717d0f9cb4 (PM / OPP: Initialize regulator pointer to an error value)
Reported-by: Marc Gonzalez 
Signed-off-by: Viresh Kumar 
Reviewed-by: Stephen Boyd 
Signed-off-by: Rafael J. Wysocki

PM / wakeirq: fix wakeirq setting after wakup re-configuration from sysfs

2016-04-07T20:23:47+00:00

Now wakeirq stops working for device if wakeup option for
this device will be reconfigured through sysfs, like:

echo disabled > /sys/devices/platform/extcon_usb1/power/wakeup
echo enabled > /sys/devices/platform/extcon_usb1/power/wakeup

Once above set of commands is executed the device's wakeup_source
opject will be recreated and dev->power.wakeup->wakeirq field will
contain NULL. As result, device_wakeup_arm_wake_irqs() will not arm
wakeirq for the affected device.

Hece, lets try to fix it in the following way:
  check for dev->wakeirq field when device_wakeup_attach() is called
  and if !NULL re-attach wakeirq to the device

Signed-off-by: Grygorii Strashko 
Acked-by: Tony Lindgren 
Signed-off-by: Rafael J. Wysocki

Merge branches 'pm-avs', 'pm-clk', 'pm-devfreq' and 'pm-sleep'

2016-03-24T23:58:18+00:00

* pm-avs:
  PM / AVS: rockchip-io: add io selectors and supplies for rk3399

* pm-clk:
  PM / clk: Add support for obtaining clocks from device-tree

* pm-devfreq:
  PM / devfreq: Spelling s/frequnecy/frequency/

* pm-sleep:
  ACPI / PM: Runtime resume devices when waking from hibernate
  PM / sleep: Clear pm_suspend_global_flags upon hibernate

PM / clk: Add support for obtaining clocks from device-tree

2016-03-17T01:32:04+00:00

The PM clocks framework requires clients to pass either a con-id or a
valid clk pointer in order to add a clock to a device. Add a new
function of_pm_clk_add_clks() to allows device clocks to be retrieved
from device-tree and populated for a given device. Note that it is
not necessary to make the compilation of this new function dependent
upon CONFIG_OF because there are stubs functions for the device-tree
APIs used.

In order to handle errors encountered when adding clocks from
device-tree, add a function pm_clk_remove_clk() to remove any clocks
(using a pointer to the clk structure) that have been added
successfully before the error occurred.

Signed-off-by: Jon Hunter 
Acked-by: Geert Uytterhoeven 
Signed-off-by: Rafael J. Wysocki

Merge branches 'pm-cpuidle', 'pm-sleep' and 'pm-domains'

2016-03-14T13:22:22+00:00

* pm-cpuidle:
  cpuidle: menu: help gcc generate slightly better code
  cpuidle: menu: avoid expensive square root computation

* pm-sleep:
  PM / suspend: replacing printk
  PM/freezer: y2038, use boottime to compare tstamps
  PM / sleep: declare __tracedata symbols as char[] rather than char

* pm-domains:
  PM / Domains: Fix potential NULL pointer dereference
  PM / Domains: Fix removal of a subdomain
  PM / Domains: Propagate start and restore errors during runtime resume
  PM / Domains: Join state name and index in debugfs output
  PM / Domains: Restore alignment of slaves in debugfs output
  PM / Domains: remove old power on/off latencies
  ARM: imx6: pm: declare pm domain latency on power_state struct
  PM / Domains: Support for multiple states

PM / Domains: Fix potential NULL pointer dereference

2016-03-08T23:41:07+00:00

In the function of_genpd_get_from_provider(), we never check to see if
the argument 'genpdspec' is NULL before dereferencing it. Add error
checking to handle any NULL pointers.

Signed-off-by: Jon Hunter 
Acked-by: Ulf Hansson 
Signed-off-by: Rafael J. Wysocki

PM / Domains: Fix removal of a subdomain

2016-03-08T23:41:06+00:00

Commit 30e7a65b3fdb (PM / Domains: Ensure subdomain is not in use
before removing) added a test to ensure that a subdomain is not a
master to another subdomain or if any devices are using the subdomain
before removing. This change incorrectly used the "slave_links" list to
determine if the subdomain is a master to another subdomain, where it
should have been using the "master_links" list instead. The
"slave_links" list will never be empty for a subdomain and so a
subdomain can never be removed. Fix this by testing if the
"master_links" list is empty instead.

Fixes: 30e7a65b3fdb (PM / Domains: Ensure subdomain is not in use before removing)
Signed-off-by: Jon Hunter 
Reviewed-by: Thierry Reding 
Acked-by: Ulf Hansson 
Acked-by: Kevin Hilman 
Signed-off-by: Rafael J. Wysocki

PM / Domains: Propagate start and restore errors during runtime resume

2016-03-08T23:37:59+00:00

During runtime resume the return values of the start and restore steps
are ignored. As a result drivers are not notified of runtime resume
failures and can't propagate them up. Fix it by returning an error if
either the start or restore step fails, and clean up properly in the
error path.

Signed-off-by: Laurent Pinchart 
Acked-by: Kevin Hilman 
Acked-by: Ulf Hansson 
Signed-off-by: Rafael J. Wysocki