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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-12-10 01:02:13 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-01-03 00:30:00 +0100
commit32bfa56ac158c1ebcc82df2518860f824be5e5be (patch)
treedc96e70410c19847ed630c97d7aab91779b0f4c0 /Documentation/driver-api
parent75e94645fc3b1007eacb4c7863059f8e8d098cda (diff)
downloadlinux-32bfa56ac158c1ebcc82df2518860f824be5e5be.tar.bz2
PM / core: Direct DPM_FLAG_LEAVE_SUSPENDED handling
Make the PM core handle DPM_FLAG_LEAVE_SUSPENDED directly for devices whose "noirq", "late" and "early" driver callbacks are invoked directly by it. Namely, make it skip all of the system-wide resume callbacks for such devices with DPM_FLAG_LEAVE_SUSPENDED set if they are in runtime suspend during the "noirq" phase of system-wide suspend (or analogous) transitions or the system transition under way is a proper suspend (rather than anything related to hibernation) and the device's wakeup settings are compatible with runtime PM (that is, the device cannot generate wakeup signals at all or it is allowed to wake up the system from sleep). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/driver-api')
-rw-r--r--Documentation/driver-api/pm/devices.rst9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/driver-api/pm/devices.rst b/Documentation/driver-api/pm/devices.rst
index 07026811dcae..1128705a5731 100644
--- a/Documentation/driver-api/pm/devices.rst
+++ b/Documentation/driver-api/pm/devices.rst
@@ -816,3 +816,12 @@ appropriate in its "noirq" resume callback, which is executed regardless of
whether or not the device is left suspended, but the other resume callbacks
(except for ``->complete``) will be skipped automatically by the PM core if the
device really can be left in suspend.
+
+For devices whose "noirq", "late" and "early" driver callbacks are invoked
+directly by the PM core, all of the system-wide resume callbacks are skipped if
+``DPM_FLAG_LEAVE_SUSPENDED`` is set and the device is in runtime suspend during
+the ``suspend_noirq`` (or analogous) phase or the transition under way is a
+proper system suspend (rather than anything related to hibernation) and the
+device's wakeup settings are suitable for runtime PM (that is, it cannot
+generate wakeup signals at all or it is allowed to wake up the system from
+sleep).