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| author | Alexander Usyskin <alexander.usyskin@intel.com> | 2014-07-17 10:53:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-17 18:38:36 -0700 |
| commit | d5d83f8abea13d0b50ee762276c6c900d1946264 (patch) | |
| tree | 0d200d16d2270a52d892cab4e77989a0fe07c83d /drivers/misc | |
| parent | 22b987a325701223f9a37db700c6eb20b9924c6f (diff) | |
| download | linux-d5d83f8abea13d0b50ee762276c6c900d1946264.tar.gz linux-d5d83f8abea13d0b50ee762276c6c900d1946264.tar.bz2 linux-d5d83f8abea13d0b50ee762276c6c900d1946264.zip | |
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>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/mei/pci-me.c | 2 | ||||
| -rw-r--r-- | drivers/misc/mei/pci-txe.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index f0da3c91f0a8..a0e9422b55a2 100644 --- a/drivers/misc/mei/pci-me.c +++ b/drivers/misc/mei/pci-me.c @@ -369,7 +369,7 @@ static int mei_me_pm_runtime_idle(struct device *device) if (!dev) return -ENODEV; if (mei_write_is_idle(dev)) - pm_schedule_suspend(device, MEI_ME_RPM_TIMEOUT * 2); + pm_runtime_autosuspend(device); return -EBUSY; } diff --git a/drivers/misc/mei/pci-txe.c b/drivers/misc/mei/pci-txe.c index d7480fe8994d..19de57368b7a 100644 --- a/drivers/misc/mei/pci-txe.c +++ b/drivers/misc/mei/pci-txe.c @@ -306,7 +306,7 @@ static int mei_txe_pm_runtime_idle(struct device *device) if (!dev) return -ENODEV; if (mei_write_is_idle(dev)) - pm_schedule_suspend(device, MEI_TXI_RPM_TIMEOUT * 2); + pm_runtime_autosuspend(device); return -EBUSY; } |