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mei: don't schedule suspend in pm idle
Calling pm_schedule_suspend from the runtime pm idle callback may reschedule existing timer, thus in case of frequent runtime rpm idle call the suspend maybe starved. Instead we call pm_runtime_autosuspend which is checking if the timer is already charged. An example is monitoring device pci config space. Pci config sysfs handlers calls pci_config_pm_runtime_put/get helpers which in turns calls to device idle callback Cc: stable@vger.kernel.org # 3.15+ Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -369,7 +369,7 @@ static int mei_me_pm_runtime_idle(struct device *device)
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if (!dev)
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return -ENODEV;
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if (mei_write_is_idle(dev))
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pm_schedule_suspend(device, MEI_ME_RPM_TIMEOUT * 2);
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pm_runtime_autosuspend(device);
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return -EBUSY;
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}
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@ -306,7 +306,7 @@ static int mei_txe_pm_runtime_idle(struct device *device)
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if (!dev)
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return -ENODEV;
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if (mei_write_is_idle(dev))
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pm_schedule_suspend(device, MEI_TXI_RPM_TIMEOUT * 2);
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pm_runtime_autosuspend(device);
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return -EBUSY;
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}
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