Hi,
The cpuidle menu governor has a problem that it returns 0 when it can't find
a suitable C-state, but on some systems in some situations 0 may be the
CPUIDLE_DRIVER_STATE_START index and it shouldn't be returned if the
corresponding
C-state has been disabled, for example.
The following two patches avoid this issue by modifying the menu governor to
return an error code rather than 0 in those situations.
[1/2] Combine cpuidle_enabled() with cpuidle_select(), because [2/2] makes
the latter return negative error codes sometimes, so keeping them separate
is not useful any more.
[2/2] Modify the menu governor to return an error code if the extra "poll" state
is not available.
Thanks!
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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