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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-05-01 00:14:04 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-05-01 00:14:04 +0200
commit3836785a1bdcd6706c68ad46bf53adc0b057b310 (patch)
tree874d51f7408229396b15dd1cbe76e0cc52744b87 /drivers/cpuidle
parent52c324f8a87b336496d0f5e9d8dff1aa32bb08cd (diff)
downloadop-kernel-dev-3836785a1bdcd6706c68ad46bf53adc0b057b310.zip
op-kernel-dev-3836785a1bdcd6706c68ad46bf53adc0b057b310.tar.gz
cpuidle / menu: Return (-1) if there are no suitable states
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>
Diffstat (limited to 'drivers/cpuidle')
-rw-r--r--drivers/cpuidle/governors/menu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c
index 71b5232..3ca15a8 100644
--- a/drivers/cpuidle/governors/menu.c
+++ b/drivers/cpuidle/governors/menu.c
@@ -296,7 +296,7 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev)
data->needs_update = 0;
}
- data->last_state_idx = 0;
+ data->last_state_idx = CPUIDLE_DRIVER_STATE_START - 1;
/* Special case when user has set very strict latency requirement */
if (unlikely(latency_req == 0))
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