mei: don't schedule suspend in pm idle
authorAlexander Usyskin <alexander.usyskin@intel.com>
Thu, 17 Jul 2014 07:53:36 +0000 (10:53 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 18 Jul 2014 01:38:36 +0000 (18:38 -0700)
commitd5d83f8abea13d0b50ee762276c6c900d1946264
tree0d200d16d2270a52d892cab4e77989a0fe07c83d
parent22b987a325701223f9a37db700c6eb20b9924c6f
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>
drivers/misc/mei/pci-me.c
drivers/misc/mei/pci-txe.c