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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-05-01 00:14:04 +0200 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2016-08-26 19:29:37 +0200 |
| commit | 0234758c01f522a2bc0b80e7543c7bef447be65b (patch) | |
| tree | ad4cb68e671ea9a19505d923fb8a045135e6efe0 /drivers/base/regmap | |
| parent | 0900922b32411cafbeeb7ace3a00939749652d87 (diff) | |
cpuidle / menu: Return (-1) if there are no suitable states
commit 3836785a1bdcd6706c68ad46bf53adc0b057b310 upstream.
If there is a PM QoS latency limit and all of the sufficiently shallow
C-states are disabled, the cpuidle menu governor returns 0 which on
some systems is CPUIDLE_DRIVER_STATE_START and shouldn't be returned
if that C-state has been disabled.
Fix the issue by modifying the menu governor to return (-1) in such
situations.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[shilpab: Backport to 3.10.y
- adjust context
- add a check if 'next_state' is less than 0 in 'cpuidle_idle_call()',
this ensures that we exit 'cpuidle_idle_call()' if governor->select()
returns negative value]
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Guendhoer <stefan@guendhoer.com>
Diffstat (limited to 'drivers/base/regmap')
0 files changed, 0 insertions, 0 deletions