From 107d47b2b95ef478d71f3bf36201886d7475427a Mon Sep 17 00:00:00 2001
From: Rafael J. Wysocki
Date: Sat, 18 Apr 2020 18:29:30 +0200
Subject: PM: sleep: core: Simplify the SMART_SUSPEND flag handling

The code to handle the SMART_SUSPEND driver PM flag is hard to follow
and somewhat inconsistent with respect to devices without middle-layer
(subsystem) callbacks.

Namely, for those devices the core takes the role of a middle layer
in providing the expected ordering of execution of callbacks (under
the assumption that the drivers setting SMART_SUSPEND can reuse their
PM-runtime callbacks directly for system-wide suspend).  To that end,
it prevents driver ->suspend_late and ->suspend_noirq callbacks from
being executed for devices that are still runtime-suspended in
__device_suspend_late(), because running the same callback funtion
that was previously run by PM-runtime for them may be invalid.

However, it does that only for devices without any middle-layer
callbacks for the late/noirq/early suspend/resume phases even
though it would be simpler and more consistent to skip the
driver-lavel callbacks for all devices with SMART_SUSPEND set
that are runtime-suspended in __device_suspend_late().

Simplify the code in accordance with the above observation.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
---
 drivers/base/power/main.c | 118 +++++++++++++++-------------------------------
 1 file changed, 39 insertions(+), 79 deletions(-)

(limited to 'drivers/base/power')

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index fdd508a78ffd..5d0225573bbe 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -561,24 +561,6 @@ static void dpm_watchdog_clear(struct dpm_watchdog *wd)
 
 /*------------------------- Resume routines -------------------------*/
 
-/**
- * suspend_event - Return a "suspend" message for given "resume" one.
- * @resume_msg: PM message representing a system-wide resume transition.
- */
-static pm_message_t suspend_event(pm_message_t resume_msg)
-{
-	switch (resume_msg.event) {
-	case PM_EVENT_RESUME:
-		return PMSG_SUSPEND;
-	case PM_EVENT_THAW:
-	case PM_EVENT_RESTORE:
-		return PMSG_FREEZE;
-	case PM_EVENT_RECOVER:
-		return PMSG_HIBERNATE;
-	}
-	return PMSG_ON;
-}
-
 /**
  * dev_pm_may_skip_resume - System-wide device resume optimization check.
  * @dev: Target device.
@@ -656,37 +638,36 @@ static int device_resume_noirq(struct device *dev, pm_message_t state, bool asyn
 	if (!dpm_wait_for_superior(dev, async))
 		goto Out;
 
-	skip_resume = dev_pm_may_skip_resume(dev);
-
 	callback = dpm_subsys_resume_noirq_cb(dev, state, &info);
-	if (callback)
+	if (callback) {
+		skip_resume = false;
 		goto Run;
+	}
 
+	skip_resume = dev_pm_may_skip_resume(dev);
 	if (skip_resume)
 		goto Skip;
 
-	if (dev_pm_smart_suspend_and_suspended(dev)) {
-		pm_message_t suspend_msg = suspend_event(state);
-
-		/*
-		 * If "freeze" callbacks have been skipped during a transition
-		 * related to hibernation, the subsequent "thaw" callbacks must
-		 * be skipped too or bad things may happen.  Otherwise, resume
-		 * callbacks are going to be run for the device, so its runtime
-		 * PM status must be changed to reflect the new state after the
-		 * transition under way.
-		 */
-		if (!dpm_subsys_suspend_late_cb(dev, suspend_msg, NULL) &&
-		    !dpm_subsys_suspend_noirq_cb(dev, suspend_msg, NULL)) {
-			if (state.event == PM_EVENT_THAW) {
-				skip_resume = true;
-				goto Skip;
-			} else {
-				pm_runtime_set_active(dev);
-			}
-		}
+	/*
+	 * If "freeze" driver callbacks have been skipped during hibernation,
+	 * because the device was runtime-suspended in __device_suspend_late(),
+	 * the corresponding "thaw" callbacks must be skipped too, because
+	 * running them for a runtime-suspended device may not be valid.
+	 */
+	if (dev_pm_smart_suspend_and_suspended(dev) &&
+	    state.event == PM_EVENT_THAW) {
+		skip_resume = true;
+		goto Skip;
 	}
 
+	/*
+	 * The device is going to be resumed, so set its PM-runtime status to
+	 * "active", but do that only if DPM_FLAG_SMART_SUSPEND is set to avoid
+	 * confusing drivers that don't use it.
+	 */
+	if (dev_pm_smart_suspend_and_suspended(dev))
+		pm_runtime_set_active(dev);
+
 	if (dev->driver && dev->driver->pm) {
 		info = "noirq driver ";
 		callback = pm_noirq_op(dev->driver->pm, state);
@@ -1274,32 +1255,6 @@ static pm_callback_t dpm_subsys_suspend_noirq_cb(struct device *dev,
 	return callback;
 }
 
-static bool device_must_resume(struct device *dev, pm_message_t state,
-			       bool no_subsys_suspend_noirq)
-{
-	pm_message_t resume_msg = resume_event(state);
-
-	/*
-	 * If all of the device driver's "noirq", "late" and "early" callbacks
-	 * are invoked directly by the core, the decision to allow the device to
-	 * stay in suspend can be based on its current runtime PM status and its
-	 * wakeup settings.
-	 */
-	if (no_subsys_suspend_noirq &&
-	    !dpm_subsys_suspend_late_cb(dev, state, NULL) &&
-	    !dpm_subsys_resume_early_cb(dev, resume_msg, NULL) &&
-	    !dpm_subsys_resume_noirq_cb(dev, resume_msg, NULL))
-		return !pm_runtime_status_suspended(dev) &&
-			(resume_msg.event != PM_EVENT_RESUME ||
-			 (device_can_wakeup(dev) && !device_may_wakeup(dev)));
-
-	/*
-	 * The only safe strategy here is to require that if the device may not
-	 * be left in suspend, resume callbacks must be invoked for it.
-	 */
-	return !dev->power.may_skip_resume;
-}
-
 /**
  * __device_suspend_noirq - Execute a "noirq suspend" callback for given device.
  * @dev: Device to handle.
@@ -1313,7 +1268,6 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool a
 {
 	pm_callback_t callback;
 	const char *info;
-	bool no_subsys_cb = false;
 	int error = 0;
 
 	TRACE_DEVICE(dev);
@@ -1331,9 +1285,7 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool a
 	if (callback)
 		goto Run;
 
-	no_subsys_cb = !dpm_subsys_suspend_late_cb(dev, state, NULL);
-
-	if (dev_pm_smart_suspend_and_suspended(dev) && no_subsys_cb)
+	if (dev_pm_smart_suspend_and_suspended(dev))
 		goto Skip;
 
 	if (dev->driver && dev->driver->pm) {
@@ -1351,13 +1303,16 @@ Run:
 Skip:
 	dev->power.is_noirq_suspended = true;
 
-	if (dev_pm_test_driver_flags(dev, DPM_FLAG_LEAVE_SUSPENDED)) {
-		dev->power.must_resume = dev->power.must_resume ||
-				atomic_read(&dev->power.usage_count) > 1 ||
-				device_must_resume(dev, state, no_subsys_cb);
-	} else {
+	/*
+	 * Skipping the resume of devices that were in use right before the
+	 * system suspend (as indicated by their PM-runtime usage counters)
+	 * would be suboptimal.  Also resume them if doing that is not allowed
+	 * to be skipped.
+	 */
+	if (atomic_read(&dev->power.usage_count) > 1 ||
+	    !(dev_pm_test_driver_flags(dev, DPM_FLAG_LEAVE_SUSPENDED) &&
+	      dev->power.may_skip_resume))
 		dev->power.must_resume = true;
-	}
 
 	if (dev->power.must_resume)
 		dpm_superior_set_must_resume(dev);
@@ -1539,9 +1494,14 @@ static int __device_suspend_late(struct device *dev, pm_message_t state, bool as
 	if (callback)
 		goto Run;
 
-	if (dev_pm_smart_suspend_and_suspended(dev) &&
-	    !dpm_subsys_suspend_noirq_cb(dev, state, NULL))
+	if (dev_pm_smart_suspend_and_suspended(dev)) {
+		/*
+		 * In principle, the resume of the device may be skippend if it
+		 * remains in runtime suspend at this point.
+		 */
+		dev->power.may_skip_resume = true;
 		goto Skip;
+	}
 
 	if (dev->driver && dev->driver->pm) {
 		info = "late driver ";
-- 
cgit v1.2.3


From 30205377ddbb717ee451e872fd59511f4f76373d Mon Sep 17 00:00:00 2001
From: Rafael J. Wysocki
Date: Sat, 18 Apr 2020 18:51:44 +0200
Subject: PM: sleep: core: Fold functions into their callers

Fold four functions in the PM core that each have only one caller
now into their callers.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
---
 drivers/base/power/main.c | 198 ++++++++++++++--------------------------------
 1 file changed, 60 insertions(+), 138 deletions(-)

(limited to 'drivers/base/power')

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 5d0225573bbe..75d7cdb4de9c 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -573,43 +573,6 @@ bool dev_pm_may_skip_resume(struct device *dev)
 	return !dev->power.must_resume && pm_transition.event != PM_EVENT_RESTORE;
 }
 
-static pm_callback_t dpm_subsys_resume_noirq_cb(struct device *dev,
-						pm_message_t state,
-						const char **info_p)
-{
-	pm_callback_t callback;
-	const char *info;
-
-	if (dev->pm_domain) {
-		info = "noirq power domain ";
-		callback = pm_noirq_op(&dev->pm_domain->ops, state);
-	} else if (dev->type && dev->type->pm) {
-		info = "noirq type ";
-		callback = pm_noirq_op(dev->type->pm, state);
-	} else if (dev->class && dev->class->pm) {
-		info = "noirq class ";
-		callback = pm_noirq_op(dev->class->pm, state);
-	} else if (dev->bus && dev->bus->pm) {
-		info = "noirq bus ";
-		callback = pm_noirq_op(dev->bus->pm, state);
-	} else {
-		return NULL;
-	}
-
-	if (info_p)
-		*info_p = info;
-
-	return callback;
-}
-
-static pm_callback_t dpm_subsys_suspend_noirq_cb(struct device *dev,
-						 pm_message_t state,
-						 const char **info_p);
-
-static pm_callback_t dpm_subsys_suspend_late_cb(struct device *dev,
-						pm_message_t state,
-						const char **info_p);
-
 /**
  * device_resume_noirq - Execute a "noirq resume" callback for given device.
  * @dev: Device to handle.
@@ -621,8 +584,8 @@ static pm_callback_t dpm_subsys_suspend_late_cb(struct device *dev,
  */
 static int device_resume_noirq(struct device *dev, pm_message_t state, bool async)
 {
-	pm_callback_t callback;
-	const char *info;
+	pm_callback_t callback = NULL;
+	const char *info = NULL;
 	bool skip_resume;
 	int error = 0;
 
@@ -638,7 +601,19 @@ static int device_resume_noirq(struct device *dev, pm_message_t state, bool asyn
 	if (!dpm_wait_for_superior(dev, async))
 		goto Out;
 
-	callback = dpm_subsys_resume_noirq_cb(dev, state, &info);
+	if (dev->pm_domain) {
+		info = "noirq power domain ";
+		callback = pm_noirq_op(&dev->pm_domain->ops, state);
+	} else if (dev->type && dev->type->pm) {
+		info = "noirq type ";
+		callback = pm_noirq_op(dev->type->pm, state);
+	} else if (dev->class && dev->class->pm) {
+		info = "noirq class ";
+		callback = pm_noirq_op(dev->class->pm, state);
+	} else if (dev->bus && dev->bus->pm) {
+		info = "noirq bus ";
+		callback = pm_noirq_op(dev->bus->pm, state);
+	}
 	if (callback) {
 		skip_resume = false;
 		goto Run;
@@ -791,35 +766,6 @@ void dpm_resume_noirq(pm_message_t state)
 	cpuidle_resume();
 }
 
-static pm_callback_t dpm_subsys_resume_early_cb(struct device *dev,
-						pm_message_t state,
-						const char **info_p)
-{
-	pm_callback_t callback;
-	const char *info;
-
-	if (dev->pm_domain) {
-		info = "early power domain ";
-		callback = pm_late_early_op(&dev->pm_domain->ops, state);
-	} else if (dev->type && dev->type->pm) {
-		info = "early type ";
-		callback = pm_late_early_op(dev->type->pm, state);
-	} else if (dev->class && dev->class->pm) {
-		info = "early class ";
-		callback = pm_late_early_op(dev->class->pm, state);
-	} else if (dev->bus && dev->bus->pm) {
-		info = "early bus ";
-		callback = pm_late_early_op(dev->bus->pm, state);
-	} else {
-		return NULL;
-	}
-
-	if (info_p)
-		*info_p = info;
-
-	return callback;
-}
-
 /**
  * device_resume_early - Execute an "early resume" callback for given device.
  * @dev: Device to handle.
@@ -830,8 +776,8 @@ static pm_callback_t dpm_subsys_resume_early_cb(struct device *dev,
  */
 static int device_resume_early(struct device *dev, pm_message_t state, bool async)
 {
-	pm_callback_t callback;
-	const char *info;
+	pm_callback_t callback = NULL;
+	const char *info = NULL;
 	int error = 0;
 
 	TRACE_DEVICE(dev);
@@ -846,9 +792,19 @@ static int device_resume_early(struct device *dev, pm_message_t state, bool asyn
 	if (!dpm_wait_for_superior(dev, async))
 		goto Out;
 
-	callback = dpm_subsys_resume_early_cb(dev, state, &info);
-
-	if (!callback && dev->driver && dev->driver->pm) {
+	if (dev->pm_domain) {
+		info = "early power domain ";
+		callback = pm_late_early_op(&dev->pm_domain->ops, state);
+	} else if (dev->type && dev->type->pm) {
+		info = "early type ";
+		callback = pm_late_early_op(dev->type->pm, state);
+	} else if (dev->class && dev->class->pm) {
+		info = "early class ";
+		callback = pm_late_early_op(dev->class->pm, state);
+	} else if (dev->bus && dev->bus->pm) {
+		info = "early bus ";
+		callback = pm_late_early_op(dev->bus->pm, state);
+	} else if (dev->driver && dev->driver->pm) {
 		info = "early driver ";
 		callback = pm_late_early_op(dev->driver->pm, state);
 	}
@@ -1226,35 +1182,6 @@ static void dpm_superior_set_must_resume(struct device *dev)
 	device_links_read_unlock(idx);
 }
 
-static pm_callback_t dpm_subsys_suspend_noirq_cb(struct device *dev,
-						 pm_message_t state,
-						 const char **info_p)
-{
-	pm_callback_t callback;
-	const char *info;
-
-	if (dev->pm_domain) {
-		info = "noirq power domain ";
-		callback = pm_noirq_op(&dev->pm_domain->ops, state);
-	} else if (dev->type && dev->type->pm) {
-		info = "noirq type ";
-		callback = pm_noirq_op(dev->type->pm, state);
-	} else if (dev->class && dev->class->pm) {
-		info = "noirq class ";
-		callback = pm_noirq_op(dev->class->pm, state);
-	} else if (dev->bus && dev->bus->pm) {
-		info = "noirq bus ";
-		callback = pm_noirq_op(dev->bus->pm, state);
-	} else {
-		return NULL;
-	}
-
-	if (info_p)
-		*info_p = info;
-
-	return callback;
-}
-
 /**
  * __device_suspend_noirq - Execute a "noirq suspend" callback for given device.
  * @dev: Device to handle.
@@ -1266,8 +1193,8 @@ static pm_callback_t dpm_subsys_suspend_noirq_cb(struct device *dev,
  */
 static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool async)
 {
-	pm_callback_t callback;
-	const char *info;
+	pm_callback_t callback = NULL;
+	const char *info = NULL;
 	int error = 0;
 
 	TRACE_DEVICE(dev);
@@ -1281,7 +1208,19 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool a
 	if (dev->power.syscore || dev->power.direct_complete)
 		goto Complete;
 
-	callback = dpm_subsys_suspend_noirq_cb(dev, state, &info);
+	if (dev->pm_domain) {
+		info = "noirq power domain ";
+		callback = pm_noirq_op(&dev->pm_domain->ops, state);
+	} else if (dev->type && dev->type->pm) {
+		info = "noirq type ";
+		callback = pm_noirq_op(dev->type->pm, state);
+	} else if (dev->class && dev->class->pm) {
+		info = "noirq class ";
+		callback = pm_noirq_op(dev->class->pm, state);
+	} else if (dev->bus && dev->bus->pm) {
+		info = "noirq bus ";
+		callback = pm_noirq_op(dev->bus->pm, state);
+	}
 	if (callback)
 		goto Run;
 
@@ -1429,35 +1368,6 @@ static void dpm_propagate_wakeup_to_parent(struct device *dev)
 	spin_unlock_irq(&parent->power.lock);
 }
 
-static pm_callback_t dpm_subsys_suspend_late_cb(struct device *dev,
-						pm_message_t state,
-						const char **info_p)
-{
-	pm_callback_t callback;
-	const char *info;
-
-	if (dev->pm_domain) {
-		info = "late power domain ";
-		callback = pm_late_early_op(&dev->pm_domain->ops, state);
-	} else if (dev->type && dev->type->pm) {
-		info = "late type ";
-		callback = pm_late_early_op(dev->type->pm, state);
-	} else if (dev->class && dev->class->pm) {
-		info = "late class ";
-		callback = pm_late_early_op(dev->class->pm, state);
-	} else if (dev->bus && dev->bus->pm) {
-		info = "late bus ";
-		callback = pm_late_early_op(dev->bus->pm, state);
-	} else {
-		return NULL;
-	}
-
-	if (info_p)
-		*info_p = info;
-
-	return callback;
-}
-
 /**
  * __device_suspend_late - Execute a "late suspend" callback for given device.
  * @dev: Device to handle.
@@ -1468,8 +1378,8 @@ static pm_callback_t dpm_subsys_suspend_late_cb(struct device *dev,
  */
 static int __device_suspend_late(struct device *dev, pm_message_t state, bool async)
 {
-	pm_callback_t callback;
-	const char *info;
+	pm_callback_t callback = NULL;
+	const char *info = NULL;
 	int error = 0;
 
 	TRACE_DEVICE(dev);
@@ -1490,7 +1400,19 @@ static int __device_suspend_late(struct device *dev, pm_message_t state, bool as
 	if (dev->power.syscore || dev->power.direct_complete)
 		goto Complete;
 
-	callback = dpm_subsys_suspend_late_cb(dev, state, &info);
+	if (dev->pm_domain) {
+		info = "late power domain ";
+		callback = pm_late_early_op(&dev->pm_domain->ops, state);
+	} else if (dev->type && dev->type->pm) {
+		info = "late type ";
+		callback = pm_late_early_op(dev->type->pm, state);
+	} else if (dev->class && dev->class->pm) {
+		info = "late class ";
+		callback = pm_late_early_op(dev->class->pm, state);
+	} else if (dev->bus && dev->bus->pm) {
+		info = "late bus ";
+		callback = pm_late_early_op(dev->bus->pm, state);
+	}
 	if (callback)
 		goto Run;
 
-- 
cgit v1.2.3


From 6e176bf8d46194353163c2cb660808bc633b45d9 Mon Sep 17 00:00:00 2001
From: Rafael J. Wysocki
Date: Sat, 18 Apr 2020 18:52:08 +0200
Subject: PM: sleep: core: Do not skip callbacks in the resume phase

The current code in device_resume_noirq() causes the entire early
resume and resume phases of device suspend to be skipped for
devices for which the noirq resume phase have been skipped (due
to the LEAVE_SUSPENDED flag being set) on the premise that those
devices should stay in runtime-suspend after system-wide resume.

However, that may not be correct in two situations.  First, the
middle layer (subsystem) noirq resume callback may be missing for
a given device, but its early resume callback may be present and it
may need to do something even if it decides to skip the driver
callback.  Second, if the device's wakeup settings were adjusted
in the suspend phase without resuming the device (that was in
runtime suspend at that time), they most likely need to be
adjusted again in the resume phase and so the driver callback
in that phase needs to be run.

For the above reason, modify the core to allow the middle layer
->resume_late callback to run even if its ->resume_noirq callback
is missing (and the core has skipped the driver-level callback
in that phase) and to allow all device callbacks to run in the
resume phase.  Also make the core set the PM-runtime status of
devices with SMART_SUSPEND set whose resume callbacks are not
skipped to "active" in the "noirq" resume phase and update the
affected subsystems (PCI and ACPI) accordingly.

After this change, middle-layer (subsystem) callbacks will always
be invoked in all phases of system suspend and resume and driver
callbacks will always run in the prepare, suspend, resume, and
complete phases for all devices.

For devices with SMART_SUSPEND set, driver callbacks will be
skipped in the late and noirq phases of system suspend if those
devices remain in runtime suspend in __device_suspend_late().
Driver callbacks will also be skipped for them during the
noirq and early phases of the "thaw" transition related to
hibernation in that case.

Setting LEAVE_SUSPENDED means that the driver allows its callbacks
to be skipped in the noirq and early phases of system resume, but
some additional conditions need to be met for that to happen (among
other things, the power.may_skip_resume flag needs to be set for the
device during system suspend for the driver callbacks to be skipped
during the subsequent resume transition).

For all devices with SMART_SUSPEND set whose driver callbacks are
invoked during system resume, the PM-runtime status will be set to
"active" (by the core).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 Documentation/power/pci.rst |  5 +--
 drivers/acpi/acpi_lpss.c    |  6 ++--
 drivers/acpi/device_pm.c    | 15 ++++----
 drivers/base/power/main.c   | 85 ++++++++++++++++++++++-----------------------
 drivers/pci/pci-driver.c    | 18 +++++-----
 5 files changed, 62 insertions(+), 67 deletions(-)

(limited to 'drivers/base/power')

diff --git a/Documentation/power/pci.rst b/Documentation/power/pci.rst
index 0924d29636ad..a39b2461919a 100644
--- a/Documentation/power/pci.rst
+++ b/Documentation/power/pci.rst
@@ -1035,10 +1035,7 @@ This flag is checked by the PM core, but the PCI bus type informs the PM core
 which devices may be left in suspend from its perspective (that happens during
 the "noirq" phase of system-wide suspend and analogous transitions) and next it
 uses the dev_pm_may_skip_resume() helper to decide whether or not to return from
-pci_pm_resume_noirq() early, as the PM core will skip the remaining resume
-callbacks for the device during the transition under way and will set its
-runtime PM status to "suspended" if dev_pm_may_skip_resume() returns "true" for
-it.
+pci_pm_resume_noirq() and pci_pm_resume_early() upfront.
 
 3.2. Device Runtime Power Management
 ------------------------------------
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index dee999938213..c4a84df6cc98 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -1093,6 +1093,9 @@ static int acpi_lpss_resume_early(struct device *dev)
 	if (pdata->dev_desc->resume_from_noirq)
 		return 0;
 
+	if (dev_pm_may_skip_resume(dev))
+		return 0;
+
 	return acpi_lpss_do_resume_early(dev);
 }
 
@@ -1105,9 +1108,6 @@ static int acpi_lpss_resume_noirq(struct device *dev)
 	if (dev_pm_may_skip_resume(dev))
 		return 0;
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
-		pm_runtime_set_active(dev);
-
 	ret = pm_generic_resume_noirq(dev);
 	if (ret)
 		return ret;
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index b2263ec67b43..399684085f85 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1132,14 +1132,6 @@ static int acpi_subsys_resume_noirq(struct device *dev)
 	if (dev_pm_may_skip_resume(dev))
 		return 0;
 
-	/*
-	 * Devices with DPM_FLAG_SMART_SUSPEND may be left in runtime suspend
-	 * during system suspend, so update their runtime PM status to "active"
-	 * as they will be put into D0 going forward.
-	 */
-	if (dev_pm_smart_suspend_and_suspended(dev))
-		pm_runtime_set_active(dev);
-
 	return pm_generic_resume_noirq(dev);
 }
 
@@ -1153,7 +1145,12 @@ static int acpi_subsys_resume_noirq(struct device *dev)
  */
 static int acpi_subsys_resume_early(struct device *dev)
 {
-	int ret = acpi_dev_resume(dev);
+	int ret;
+
+	if (dev_pm_may_skip_resume(dev))
+		return 0;
+
+	ret = acpi_dev_resume(dev);
 	return ret ? ret : pm_generic_resume_early(dev);
 }
 
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 75d7cdb4de9c..25b0302188d8 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -565,12 +565,22 @@ static void dpm_watchdog_clear(struct dpm_watchdog *wd)
  * dev_pm_may_skip_resume - System-wide device resume optimization check.
  * @dev: Target device.
  *
- * Checks whether or not the device may be left in suspend after a system-wide
- * transition to the working state.
+ * Return:
+ * - %false if the transition under way is RESTORE.
+ * - The return value of dev_pm_smart_suspend_and_suspended() if the transition
+ *   under way is THAW.
+ * - The logical negation of %power.must_resume otherwise (that is, when the
+ *   transition under way is RESUME).
  */
 bool dev_pm_may_skip_resume(struct device *dev)
 {
-	return !dev->power.must_resume && pm_transition.event != PM_EVENT_RESTORE;
+	if (pm_transition.event == PM_EVENT_RESTORE)
+		return false;
+
+	if (pm_transition.event == PM_EVENT_THAW)
+		return dev_pm_smart_suspend_and_suspended(dev);
+
+	return !dev->power.must_resume;
 }
 
 /**
@@ -601,6 +611,22 @@ static int device_resume_noirq(struct device *dev, pm_message_t state, bool asyn
 	if (!dpm_wait_for_superior(dev, async))
 		goto Out;
 
+	skip_resume = dev_pm_may_skip_resume(dev);
+	/*
+	 * If the driver callback is skipped below or by the middle layer
+	 * callback and device_resume_early() also skips the driver callback for
+	 * this device later, it needs to appear as "suspended" to PM-runtime,
+	 * so change its status accordingly.
+	 *
+	 * Otherwise, the device is going to be resumed, so set its PM-runtime
+	 * status to "active", but do that only if DPM_FLAG_SMART_SUSPEND is set
+	 * to avoid confusing drivers that don't use it.
+	 */
+	if (skip_resume)
+		pm_runtime_set_suspended(dev);
+	else if (dev_pm_smart_suspend_and_suspended(dev))
+		pm_runtime_set_active(dev);
+
 	if (dev->pm_domain) {
 		info = "noirq power domain ";
 		callback = pm_noirq_op(&dev->pm_domain->ops, state);
@@ -614,35 +640,12 @@ static int device_resume_noirq(struct device *dev, pm_message_t state, bool asyn
 		info = "noirq bus ";
 		callback = pm_noirq_op(dev->bus->pm, state);
 	}
-	if (callback) {
-		skip_resume = false;
+	if (callback)
 		goto Run;
-	}
 
-	skip_resume = dev_pm_may_skip_resume(dev);
 	if (skip_resume)
 		goto Skip;
 
-	/*
-	 * If "freeze" driver callbacks have been skipped during hibernation,
-	 * because the device was runtime-suspended in __device_suspend_late(),
-	 * the corresponding "thaw" callbacks must be skipped too, because
-	 * running them for a runtime-suspended device may not be valid.
-	 */
-	if (dev_pm_smart_suspend_and_suspended(dev) &&
-	    state.event == PM_EVENT_THAW) {
-		skip_resume = true;
-		goto Skip;
-	}
-
-	/*
-	 * The device is going to be resumed, so set its PM-runtime status to
-	 * "active", but do that only if DPM_FLAG_SMART_SUSPEND is set to avoid
-	 * confusing drivers that don't use it.
-	 */
-	if (dev_pm_smart_suspend_and_suspended(dev))
-		pm_runtime_set_active(dev);
-
 	if (dev->driver && dev->driver->pm) {
 		info = "noirq driver ";
 		callback = pm_noirq_op(dev->driver->pm, state);
@@ -654,20 +657,6 @@ Run:
 Skip:
 	dev->power.is_noirq_suspended = false;
 
-	if (skip_resume) {
-		/* Make the next phases of resume skip the device. */
-		dev->power.is_late_suspended = false;
-		dev->power.is_suspended = false;
-		/*
-		 * The device is going to be left in suspend, but it might not
-		 * have been in runtime suspend before the system suspended, so
-		 * its runtime PM status needs to be updated to avoid confusing
-		 * the runtime PM framework when runtime PM is enabled for the
-		 * device again.
-		 */
-		pm_runtime_set_suspended(dev);
-	}
-
 Out:
 	complete_all(&dev->power.completion);
 	TRACE_RESUME(error);
@@ -804,15 +793,25 @@ static int device_resume_early(struct device *dev, pm_message_t state, bool asyn
 	} else if (dev->bus && dev->bus->pm) {
 		info = "early bus ";
 		callback = pm_late_early_op(dev->bus->pm, state);
-	} else if (dev->driver && dev->driver->pm) {
+	}
+	if (callback)
+		goto Run;
+
+	if (dev_pm_may_skip_resume(dev))
+		goto Skip;
+
+	if (dev->driver && dev->driver->pm) {
 		info = "early driver ";
 		callback = pm_late_early_op(dev->driver->pm, state);
 	}
 
+Run:
 	error = dpm_run_callback(callback, dev, state, info);
+
+Skip:
 	dev->power.is_late_suspended = false;
 
- Out:
+Out:
 	TRACE_RESUME(error);
 
 	pm_runtime_enable(dev);
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 0454ca0e4e3f..685fbf044911 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -896,14 +896,6 @@ static int pci_pm_resume_noirq(struct device *dev)
 	if (dev_pm_may_skip_resume(dev))
 		return 0;
 
-	/*
-	 * Devices with DPM_FLAG_SMART_SUSPEND may be left in runtime suspend
-	 * during system suspend, so update their runtime PM status to "active"
-	 * as they are going to be put into D0 shortly.
-	 */
-	if (dev_pm_smart_suspend_and_suspended(dev))
-		pm_runtime_set_active(dev);
-
 	/*
 	 * In the suspend-to-idle case, devices left in D0 during suspend will
 	 * stay in D0, so it is not necessary to restore or update their
@@ -928,6 +920,14 @@ static int pci_pm_resume_noirq(struct device *dev)
 	return 0;
 }
 
+static int pci_pm_resume_early(struct device *dev)
+{
+	if (dev_pm_may_skip_resume(dev))
+		return 0;
+
+	return pm_generic_resume_early(dev);
+}
+
 static int pci_pm_resume(struct device *dev)
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
@@ -961,6 +961,7 @@ static int pci_pm_resume(struct device *dev)
 #define pci_pm_suspend_late	NULL
 #define pci_pm_suspend_noirq	NULL
 #define pci_pm_resume		NULL
+#define pci_pm_resume_early	NULL
 #define pci_pm_resume_noirq	NULL
 
 #endif /* !CONFIG_SUSPEND */
@@ -1358,6 +1359,7 @@ static const struct dev_pm_ops pci_dev_pm_ops = {
 	.suspend = pci_pm_suspend,
 	.suspend_late = pci_pm_suspend_late,
 	.resume = pci_pm_resume,
+	.resume_early = pci_pm_resume_early,
 	.freeze = pci_pm_freeze,
 	.thaw = pci_pm_thaw,
 	.poweroff = pci_pm_poweroff,
-- 
cgit v1.2.3


From 0fe8a1be599ab97f840ba22d98cb8f24a9f9e872 Mon Sep 17 00:00:00 2001
From: Rafael J. Wysocki
Date: Sat, 18 Apr 2020 18:52:19 +0200
Subject: PM: sleep: core: Rework the power.may_skip_resume handling

Because the power.may_skip_resume device status bit is taken
into account in combination with the DPM_FLAG_LEAVE_SUSPENDED
driver flag, it can be set to 'true' for all devices in the
"suspend" phase of a suspend-resume cycle, so do that.

Then, neither the PM core nor the middle-layer (sybsystem) code
handling it needs to set it to 'true' any more and it just has
to be cleared if there is a reason to avoid skipping the "noirq"
and "early" resume callbacks provided by the driver, so update
the code in question accordingly.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/acpi/device_pm.c  |  8 +++-----
 drivers/base/power/main.c | 10 ++--------
 drivers/pci/pci-driver.c  |  8 +++-----
 3 files changed, 8 insertions(+), 18 deletions(-)

(limited to 'drivers/base/power')

diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 399684085f85..1b02d7dc7d34 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1100,10 +1100,8 @@ int acpi_subsys_suspend_noirq(struct device *dev)
 {
 	int ret;
 
-	if (dev_pm_smart_suspend_and_suspended(dev)) {
-		dev->power.may_skip_resume = true;
+	if (dev_pm_smart_suspend_and_suspended(dev))
 		return 0;
-	}
 
 	ret = pm_generic_suspend_noirq(dev);
 	if (ret)
@@ -1116,8 +1114,8 @@ int acpi_subsys_suspend_noirq(struct device *dev)
 	 * acpi_subsys_complete() to take care of fixing up the device's state
 	 * anyway, if need be.
 	 */
-	dev->power.may_skip_resume = device_may_wakeup(dev) ||
-					!device_can_wakeup(dev);
+	if (device_can_wakeup(dev) && !device_may_wakeup(dev))
+		dev->power.may_skip_resume = false;
 
 	return 0;
 }
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 25b0302188d8..5adf0be6aa47 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -1415,14 +1415,8 @@ static int __device_suspend_late(struct device *dev, pm_message_t state, bool as
 	if (callback)
 		goto Run;
 
-	if (dev_pm_smart_suspend_and_suspended(dev)) {
-		/*
-		 * In principle, the resume of the device may be skippend if it
-		 * remains in runtime suspend at this point.
-		 */
-		dev->power.may_skip_resume = true;
+	if (dev_pm_smart_suspend_and_suspended(dev))
 		goto Skip;
-	}
 
 	if (dev->driver && dev->driver->pm) {
 		info = "late driver ";
@@ -1647,7 +1641,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
 		dev->power.direct_complete = false;
 	}
 
-	dev->power.may_skip_resume = false;
+	dev->power.may_skip_resume = true;
 	dev->power.must_resume = false;
 
 	dpm_watchdog_set(&wd, dev);
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 685fbf044911..ce220b1987df 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -789,10 +789,8 @@ static int pci_pm_suspend_noirq(struct device *dev)
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 
-	if (dev_pm_smart_suspend_and_suspended(dev)) {
-		dev->power.may_skip_resume = true;
+	if (dev_pm_smart_suspend_and_suspended(dev))
 		return 0;
-	}
 
 	if (pci_has_legacy_pm_support(pci_dev))
 		return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
@@ -880,8 +878,8 @@ Fixup:
 	 * pci_pm_complete() to take care of fixing up the device's state
 	 * anyway, if need be.
 	 */
-	dev->power.may_skip_resume = device_may_wakeup(dev) ||
-					!device_can_wakeup(dev);
+	if (device_can_wakeup(dev) && !device_may_wakeup(dev))
+		dev->power.may_skip_resume = false;
 
 	return 0;
 }
-- 
cgit v1.2.3


From 76c70cb58ce30264af4b714109ee756da25d830a Mon Sep 17 00:00:00 2001
From: Rafael J. Wysocki
Date: Sat, 18 Apr 2020 18:52:30 +0200
Subject: PM: sleep: core: Rename dev_pm_may_skip_resume()

The name of dev_pm_may_skip_resume() may be easily confused with the
power.may_skip_resume flag which is not checked by that function, so
rename the former as dev_pm_skip_resume().

No functional impact.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 Documentation/power/pci.rst | 2 +-
 drivers/acpi/acpi_lpss.c    | 4 ++--
 drivers/acpi/device_pm.c    | 4 ++--
 drivers/base/power/main.c   | 8 ++++----
 drivers/pci/pci-driver.c    | 4 ++--
 include/linux/pm.h          | 2 +-
 6 files changed, 12 insertions(+), 12 deletions(-)

(limited to 'drivers/base/power')

diff --git a/Documentation/power/pci.rst b/Documentation/power/pci.rst
index a39b2461919a..aa1c7fce6cd0 100644
--- a/Documentation/power/pci.rst
+++ b/Documentation/power/pci.rst
@@ -1034,7 +1034,7 @@ device to be left in suspend after system-wide transitions to the working state.
 This flag is checked by the PM core, but the PCI bus type informs the PM core
 which devices may be left in suspend from its perspective (that happens during
 the "noirq" phase of system-wide suspend and analogous transitions) and next it
-uses the dev_pm_may_skip_resume() helper to decide whether or not to return from
+uses the dev_pm_skip_resume() helper to decide whether or not to return from
 pci_pm_resume_noirq() and pci_pm_resume_early() upfront.
 
 3.2. Device Runtime Power Management
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index c4a84df6cc98..7632df1a5be3 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -1093,7 +1093,7 @@ static int acpi_lpss_resume_early(struct device *dev)
 	if (pdata->dev_desc->resume_from_noirq)
 		return 0;
 
-	if (dev_pm_may_skip_resume(dev))
+	if (dev_pm_skip_resume(dev))
 		return 0;
 
 	return acpi_lpss_do_resume_early(dev);
@@ -1105,7 +1105,7 @@ static int acpi_lpss_resume_noirq(struct device *dev)
 	int ret;
 
 	/* Follow acpi_subsys_resume_noirq(). */
-	if (dev_pm_may_skip_resume(dev))
+	if (dev_pm_skip_resume(dev))
 		return 0;
 
 	ret = pm_generic_resume_noirq(dev);
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 1b02d7dc7d34..8c2a091728a9 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1127,7 +1127,7 @@ EXPORT_SYMBOL_GPL(acpi_subsys_suspend_noirq);
  */
 static int acpi_subsys_resume_noirq(struct device *dev)
 {
-	if (dev_pm_may_skip_resume(dev))
+	if (dev_pm_skip_resume(dev))
 		return 0;
 
 	return pm_generic_resume_noirq(dev);
@@ -1145,7 +1145,7 @@ static int acpi_subsys_resume_early(struct device *dev)
 {
 	int ret;
 
-	if (dev_pm_may_skip_resume(dev))
+	if (dev_pm_skip_resume(dev))
 		return 0;
 
 	ret = acpi_dev_resume(dev);
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 5adf0be6aa47..f98eced0f200 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -562,7 +562,7 @@ static void dpm_watchdog_clear(struct dpm_watchdog *wd)
 /*------------------------- Resume routines -------------------------*/
 
 /**
- * dev_pm_may_skip_resume - System-wide device resume optimization check.
+ * dev_pm_skip_resume - System-wide device resume optimization check.
  * @dev: Target device.
  *
  * Return:
@@ -572,7 +572,7 @@ static void dpm_watchdog_clear(struct dpm_watchdog *wd)
  * - The logical negation of %power.must_resume otherwise (that is, when the
  *   transition under way is RESUME).
  */
-bool dev_pm_may_skip_resume(struct device *dev)
+bool dev_pm_skip_resume(struct device *dev)
 {
 	if (pm_transition.event == PM_EVENT_RESTORE)
 		return false;
@@ -611,7 +611,7 @@ static int device_resume_noirq(struct device *dev, pm_message_t state, bool asyn
 	if (!dpm_wait_for_superior(dev, async))
 		goto Out;
 
-	skip_resume = dev_pm_may_skip_resume(dev);
+	skip_resume = dev_pm_skip_resume(dev);
 	/*
 	 * If the driver callback is skipped below or by the middle layer
 	 * callback and device_resume_early() also skips the driver callback for
@@ -797,7 +797,7 @@ static int device_resume_early(struct device *dev, pm_message_t state, bool asyn
 	if (callback)
 		goto Run;
 
-	if (dev_pm_may_skip_resume(dev))
+	if (dev_pm_skip_resume(dev))
 		goto Skip;
 
 	if (dev->driver && dev->driver->pm) {
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index ce220b1987df..decf82595340 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -891,7 +891,7 @@ static int pci_pm_resume_noirq(struct device *dev)
 	pci_power_t prev_state = pci_dev->current_state;
 	bool skip_bus_pm = pci_dev->skip_bus_pm;
 
-	if (dev_pm_may_skip_resume(dev))
+	if (dev_pm_skip_resume(dev))
 		return 0;
 
 	/*
@@ -920,7 +920,7 @@ static int pci_pm_resume_noirq(struct device *dev)
 
 static int pci_pm_resume_early(struct device *dev)
 {
-	if (dev_pm_may_skip_resume(dev))
+	if (dev_pm_skip_resume(dev))
 		return 0;
 
 	return pm_generic_resume_early(dev);
diff --git a/include/linux/pm.h b/include/linux/pm.h
index e057d1fa2469..d89b7099f241 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -758,7 +758,7 @@ extern int pm_generic_poweroff_late(struct device *dev);
 extern int pm_generic_poweroff(struct device *dev);
 extern void pm_generic_complete(struct device *dev);
 
-extern bool dev_pm_may_skip_resume(struct device *dev);
+extern bool dev_pm_skip_resume(struct device *dev);
 extern bool dev_pm_smart_suspend_and_suspended(struct device *dev);
 
 #else /* !CONFIG_PM_SLEEP */
-- 
cgit v1.2.3


From fa2bfead910322e44e7e0bb74364ac198a2abd32 Mon Sep 17 00:00:00 2001
From: Rafael J. Wysocki
Date: Sat, 18 Apr 2020 18:52:48 +0200
Subject: PM: sleep: core: Rename dev_pm_smart_suspend_and_suspended()

Because all callers of dev_pm_smart_suspend_and_suspended use it only
for checking whether or not to skip driver suspend callbacks for a
device, rename it to dev_pm_skip_suspend() in analogy with
dev_pm_skip_resume().

No functional impact.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/acpi/acpi_lpss.c          |  6 +++---
 drivers/acpi/device_pm.c          |  8 ++++----
 drivers/base/power/main.c         | 13 ++++++-------
 drivers/pci/hotplug/pciehp_core.c |  2 +-
 drivers/pci/pci-driver.c          |  8 ++++----
 include/linux/pm.h                |  2 +-
 6 files changed, 19 insertions(+), 20 deletions(-)

(limited to 'drivers/base/power')

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 7632df1a5be3..5e2bfbcf526f 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -1041,7 +1041,7 @@ static int acpi_lpss_do_suspend_late(struct device *dev)
 {
 	int ret;
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	ret = pm_generic_suspend_late(dev);
@@ -1169,7 +1169,7 @@ static int acpi_lpss_poweroff_late(struct device *dev)
 {
 	struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	if (pdata->dev_desc->resume_from_noirq)
@@ -1182,7 +1182,7 @@ static int acpi_lpss_poweroff_noirq(struct device *dev)
 {
 	struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	if (pdata->dev_desc->resume_from_noirq) {
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 8c2a091728a9..ae234d731d42 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1084,7 +1084,7 @@ int acpi_subsys_suspend_late(struct device *dev)
 {
 	int ret;
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	ret = pm_generic_suspend_late(dev);
@@ -1100,7 +1100,7 @@ int acpi_subsys_suspend_noirq(struct device *dev)
 {
 	int ret;
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	ret = pm_generic_suspend_noirq(dev);
@@ -1213,7 +1213,7 @@ static int acpi_subsys_poweroff_late(struct device *dev)
 {
 	int ret;
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	ret = pm_generic_poweroff_late(dev);
@@ -1229,7 +1229,7 @@ static int acpi_subsys_poweroff_late(struct device *dev)
  */
 static int acpi_subsys_poweroff_noirq(struct device *dev)
 {
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	return pm_generic_poweroff_noirq(dev);
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index f98eced0f200..3170d93e29f9 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -567,8 +567,7 @@ static void dpm_watchdog_clear(struct dpm_watchdog *wd)
  *
  * Return:
  * - %false if the transition under way is RESTORE.
- * - The return value of dev_pm_smart_suspend_and_suspended() if the transition
- *   under way is THAW.
+ * - Return value of dev_pm_skip_suspend() if the transition under way is THAW.
  * - The logical negation of %power.must_resume otherwise (that is, when the
  *   transition under way is RESUME).
  */
@@ -578,7 +577,7 @@ bool dev_pm_skip_resume(struct device *dev)
 		return false;
 
 	if (pm_transition.event == PM_EVENT_THAW)
-		return dev_pm_smart_suspend_and_suspended(dev);
+		return dev_pm_skip_suspend(dev);
 
 	return !dev->power.must_resume;
 }
@@ -624,7 +623,7 @@ static int device_resume_noirq(struct device *dev, pm_message_t state, bool asyn
 	 */
 	if (skip_resume)
 		pm_runtime_set_suspended(dev);
-	else if (dev_pm_smart_suspend_and_suspended(dev))
+	else if (dev_pm_skip_suspend(dev))
 		pm_runtime_set_active(dev);
 
 	if (dev->pm_domain) {
@@ -1223,7 +1222,7 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool a
 	if (callback)
 		goto Run;
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		goto Skip;
 
 	if (dev->driver && dev->driver->pm) {
@@ -1415,7 +1414,7 @@ static int __device_suspend_late(struct device *dev, pm_message_t state, bool as
 	if (callback)
 		goto Run;
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		goto Skip;
 
 	if (dev->driver && dev->driver->pm) {
@@ -2003,7 +2002,7 @@ void device_pm_check_callbacks(struct device *dev)
 	spin_unlock_irq(&dev->power.lock);
 }
 
-bool dev_pm_smart_suspend_and_suspended(struct device *dev)
+bool dev_pm_skip_suspend(struct device *dev)
 {
 	return dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) &&
 		pm_runtime_status_suspended(dev);
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 312cc45c44c7..bf779f291f15 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -275,7 +275,7 @@ static int pciehp_suspend(struct pcie_device *dev)
 	 * If the port is already runtime suspended we can keep it that
 	 * way.
 	 */
-	if (dev_pm_smart_suspend_and_suspended(&dev->port->dev))
+	if (dev_pm_skip_suspend(&dev->port->dev))
 		return 0;
 
 	pciehp_disable_interrupt(dev);
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index decf82595340..da6510af1221 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -776,7 +776,7 @@ static int pci_pm_suspend(struct device *dev)
 
 static int pci_pm_suspend_late(struct device *dev)
 {
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev));
@@ -789,7 +789,7 @@ static int pci_pm_suspend_noirq(struct device *dev)
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	if (pci_has_legacy_pm_support(pci_dev))
@@ -1126,7 +1126,7 @@ static int pci_pm_poweroff(struct device *dev)
 
 static int pci_pm_poweroff_late(struct device *dev)
 {
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev));
@@ -1139,7 +1139,7 @@ static int pci_pm_poweroff_noirq(struct device *dev)
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 
-	if (dev_pm_smart_suspend_and_suspended(dev))
+	if (dev_pm_skip_suspend(dev))
 		return 0;
 
 	if (pci_has_legacy_pm_support(pci_dev))
diff --git a/include/linux/pm.h b/include/linux/pm.h
index d89b7099f241..8c59a7f0bcf4 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -759,7 +759,7 @@ extern int pm_generic_poweroff(struct device *dev);
 extern void pm_generic_complete(struct device *dev);
 
 extern bool dev_pm_skip_resume(struct device *dev);
-extern bool dev_pm_smart_suspend_and_suspended(struct device *dev);
+extern bool dev_pm_skip_suspend(struct device *dev);
 
 #else /* !CONFIG_PM_SLEEP */
 
-- 
cgit v1.2.3


From e07515563d010d8b32967634e8dc2fdc732c1aa6 Mon Sep 17 00:00:00 2001
From: Rafael J. Wysocki
Date: Sat, 18 Apr 2020 18:53:01 +0200
Subject: PM: sleep: core: Rename DPM_FLAG_NEVER_SKIP

Rename DPM_FLAG_NEVER_SKIP to DPM_FLAG_NO_DIRECT_COMPLETE which
matches its purpose more closely.

No functional impact.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # for PCI parts
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
---
 Documentation/driver-api/pm/devices.rst    |  6 +++---
 Documentation/power/pci.rst                | 10 +++++-----
 drivers/base/power/main.c                  |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c    |  2 +-
 drivers/gpu/drm/i915/intel_runtime_pm.c    |  2 +-
 drivers/gpu/drm/radeon/radeon_kms.c        |  2 +-
 drivers/misc/mei/pci-me.c                  |  2 +-
 drivers/misc/mei/pci-txe.c                 |  2 +-
 drivers/net/ethernet/intel/e1000e/netdev.c |  2 +-
 drivers/net/ethernet/intel/igb/igb_main.c  |  2 +-
 drivers/net/ethernet/intel/igc/igc_main.c  |  2 +-
 drivers/pci/pcie/portdrv_pci.c             |  2 +-
 include/linux/pm.h                         |  6 +++---
 13 files changed, 21 insertions(+), 21 deletions(-)

(limited to 'drivers/base/power')

diff --git a/Documentation/driver-api/pm/devices.rst b/Documentation/driver-api/pm/devices.rst
index f66c7b9126ea..4ace0eba4506 100644
--- a/Documentation/driver-api/pm/devices.rst
+++ b/Documentation/driver-api/pm/devices.rst
@@ -361,9 +361,9 @@ the phases are: ``prepare``, ``suspend``, ``suspend_late``, ``suspend_noirq``.
 	runtime PM disabled.
 
 	This feature also can be controlled by device drivers by using the
-	``DPM_FLAG_NEVER_SKIP`` and ``DPM_FLAG_SMART_PREPARE`` driver power
-	management flags.  [Typically, they are set at the time the driver is
-	probed against the device in question by passing them to the
+	``DPM_FLAG_NO_DIRECT_COMPLETE`` and ``DPM_FLAG_SMART_PREPARE`` driver
+	power management flags.  [Typically, they are set at the time the driver
+	is probed against the device in question by passing them to the
 	:c:func:`dev_pm_set_driver_flags` helper function.]  If the first of
 	these flags is set, the PM core will not apply the direct-complete
 	procedure described above to the given device and, consequenty, to any
diff --git a/Documentation/power/pci.rst b/Documentation/power/pci.rst
index aa1c7fce6cd0..9e1408121bea 100644
--- a/Documentation/power/pci.rst
+++ b/Documentation/power/pci.rst
@@ -1004,11 +1004,11 @@ including the PCI bus type.  The flags should be set once at the driver probe
 time with the help of the dev_pm_set_driver_flags() function and they should not
 be updated directly afterwards.
 
-The DPM_FLAG_NEVER_SKIP flag prevents the PM core from using the direct-complete
-mechanism allowing device suspend/resume callbacks to be skipped if the device
-is in runtime suspend when the system suspend starts.  That also affects all of
-the ancestors of the device, so this flag should only be used if absolutely
-necessary.
+The DPM_FLAG_NO_DIRECT_COMPLETE flag prevents the PM core from using the
+direct-complete mechanism allowing device suspend/resume callbacks to be skipped
+if the device is in runtime suspend when the system suspend starts.  That also
+affects all of the ancestors of the device, so this flag should only be used if
+absolutely necessary.
 
 The DPM_FLAG_SMART_PREPARE flag instructs the PCI bus type to only return a
 positive value from pci_pm_prepare() if the ->prepare callback provided by the
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 3170d93e29f9..dbc1e5e7346b 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -1844,7 +1844,7 @@ unlock:
 	spin_lock_irq(&dev->power.lock);
 	dev->power.direct_complete = state.event == PM_EVENT_SUSPEND &&
 		(ret > 0 || dev->power.no_pm_callbacks) &&
-		!dev_pm_test_driver_flags(dev, DPM_FLAG_NEVER_SKIP);
+		!dev_pm_test_driver_flags(dev, DPM_FLAG_NO_DIRECT_COMPLETE);
 	spin_unlock_irq(&dev->power.lock);
 	return 0;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index fd1dc3236eca..a9086ea1ab60 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -191,7 +191,7 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
 	}
 
 	if (adev->runpm) {
-		dev_pm_set_driver_flags(dev->dev, DPM_FLAG_NEVER_SKIP);
+		dev_pm_set_driver_flags(dev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
 		pm_runtime_use_autosuspend(dev->dev);
 		pm_runtime_set_autosuspend_delay(dev->dev, 5000);
 		pm_runtime_set_active(dev->dev);
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index ad719c9602af..9cb2d7548daa 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -549,7 +549,7 @@ void intel_runtime_pm_enable(struct intel_runtime_pm *rpm)
 	 * becaue the HDA driver may require us to enable the audio power
 	 * domain during system suspend.
 	 */
-	dev_pm_set_driver_flags(kdev, DPM_FLAG_NEVER_SKIP);
+	dev_pm_set_driver_flags(kdev, DPM_FLAG_NO_DIRECT_COMPLETE);
 
 	pm_runtime_set_autosuspend_delay(kdev, 10000); /* 10s */
 	pm_runtime_mark_last_busy(kdev);
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 58176db85952..372962358a18 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -158,7 +158,7 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
 	}
 
 	if (radeon_is_px(dev)) {
-		dev_pm_set_driver_flags(dev->dev, DPM_FLAG_NEVER_SKIP);
+		dev_pm_set_driver_flags(dev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
 		pm_runtime_use_autosuspend(dev->dev);
 		pm_runtime_set_autosuspend_delay(dev->dev, 5000);
 		pm_runtime_set_active(dev->dev);
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 3d21c38e2dbb..53f16f3bd091 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -240,7 +240,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	 * MEI requires to resume from runtime suspend mode
 	 * in order to perform link reset flow upon system suspend.
 	 */
-	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
+	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
 
 	/*
 	 * ME maps runtime suspend/resume to D0i states,
diff --git a/drivers/misc/mei/pci-txe.c b/drivers/misc/mei/pci-txe.c
index beacf2a2f2b5..4bf26ce61044 100644
--- a/drivers/misc/mei/pci-txe.c
+++ b/drivers/misc/mei/pci-txe.c
@@ -128,7 +128,7 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	 * MEI requires to resume from runtime suspend mode
 	 * in order to perform link reset flow upon system suspend.
 	 */
-	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
+	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
 
 	/*
 	 * TXE maps runtime suspend/resume to own power gating states,
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 177c6da80c57..2730b1c7dddb 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -7549,7 +7549,7 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	e1000_print_device_info(adapter);
 
-	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
+	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
 
 	if (pci_dev_run_wake(pdev) && hw->mac.type < e1000_pch_cnp)
 		pm_runtime_put_noidle(&pdev->dev);
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index b46bff8fe056..8bb3db2cbd41 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -3445,7 +3445,7 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		}
 	}
 
-	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
+	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
 
 	pm_runtime_put_noidle(&pdev->dev);
 	return 0;
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 69fa1ce1f927..59fc0097438f 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -4825,7 +4825,7 @@ static int igc_probe(struct pci_dev *pdev,
 	pcie_print_link_status(pdev);
 	netdev_info(netdev, "MAC: %pM\n", netdev->dev_addr);
 
-	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
+	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
 
 	pm_runtime_put_noidle(&pdev->dev);
 
diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index 160d67c59310..3acf151ae015 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -115,7 +115,7 @@ static int pcie_portdrv_probe(struct pci_dev *dev,
 
 	pci_save_state(dev);
 
-	dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_NEVER_SKIP |
+	dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_NO_DIRECT_COMPLETE |
 					   DPM_FLAG_SMART_SUSPEND);
 
 	if (pci_bridge_d3_possible(dev)) {
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 8c59a7f0bcf4..cdb8fbd6ab18 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -544,7 +544,7 @@ struct pm_subsys_data {
  * These flags can be set by device drivers at the probe time.  They need not be
  * cleared by the drivers as the driver core will take care of that.
  *
- * NEVER_SKIP: Do not skip all system suspend/resume callbacks for the device.
+ * NO_DIRECT_COMPLETE: Do not apply direct-complete optimization to the device.
  * SMART_PREPARE: Check the return value of the driver's ->prepare callback.
  * SMART_SUSPEND: No need to resume the device from runtime suspend.
  * LEAVE_SUSPENDED: Avoid resuming the device during system resume if possible.
@@ -554,7 +554,7 @@ struct pm_subsys_data {
  * their ->prepare callbacks if the driver's ->prepare callback returns 0 (in
  * other words, the system suspend/resume callbacks can only be skipped for the
  * device if its driver doesn't object against that).  This flag has no effect
- * if NEVER_SKIP is set.
+ * if NO_DIRECT_COMPLETE is set.
  *
  * Setting SMART_SUSPEND instructs bus types and PM domains which may want to
  * runtime resume the device upfront during system suspend that doing so is not
@@ -565,7 +565,7 @@ struct pm_subsys_data {
  * Setting LEAVE_SUSPENDED informs the PM core and middle-layer code that the
  * driver prefers the device to be left in suspend after system resume.
  */
-#define DPM_FLAG_NEVER_SKIP		BIT(0)
+#define DPM_FLAG_NO_DIRECT_COMPLETE	BIT(0)
 #define DPM_FLAG_SMART_PREPARE		BIT(1)
 #define DPM_FLAG_SMART_SUSPEND		BIT(2)
 #define DPM_FLAG_LEAVE_SUSPENDED	BIT(3)
-- 
cgit v1.2.3


From 2a3f34750b8b07df42ab4b30b70e029d46e0d7f3 Mon Sep 17 00:00:00 2001
From: Rafael J. Wysocki
Date: Sat, 18 Apr 2020 18:53:20 +0200
Subject: PM: sleep: core: Rename DPM_FLAG_LEAVE_SUSPENDED

Rename DPM_FLAG_LEAVE_SUSPENDED to DPM_FLAG_MAY_SKIP_RESUME which
matches its purpose more closely.

No functional impact.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de> # for I2C
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 Documentation/driver-api/pm/devices.rst     | 4 ++--
 Documentation/power/pci.rst                 | 2 +-
 drivers/acpi/acpi_tad.c                     | 2 +-
 drivers/base/power/main.c                   | 2 +-
 drivers/i2c/busses/i2c-designware-platdrv.c | 4 ++--
 include/linux/pm.h                          | 6 +++---
 6 files changed, 10 insertions(+), 10 deletions(-)

(limited to 'drivers/base/power')

diff --git a/Documentation/driver-api/pm/devices.rst b/Documentation/driver-api/pm/devices.rst
index 4ace0eba4506..f342c7549b4c 100644
--- a/Documentation/driver-api/pm/devices.rst
+++ b/Documentation/driver-api/pm/devices.rst
@@ -803,7 +803,7 @@ general.]
 However, it often is desirable to leave devices in suspend after system
 transitions to the working state, especially if those devices had been in
 runtime suspend before the preceding system-wide suspend (or analogous)
-transition.  Device drivers can use the ``DPM_FLAG_LEAVE_SUSPENDED`` flag to
+transition.  Device drivers can use the ``DPM_FLAG_MAY_SKIP_RESUME`` flag to
 indicate to the PM core (and middle-layer code) that they prefer the specific
 devices handled by them to be left suspended and they have no problems with
 skipping their system-wide resume callbacks for this reason.  Whether or not the
@@ -825,7 +825,7 @@ 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
+``DPM_FLAG_MAY_SKIP_RESUME`` 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
diff --git a/Documentation/power/pci.rst b/Documentation/power/pci.rst
index 9e1408121bea..f09b382b4621 100644
--- a/Documentation/power/pci.rst
+++ b/Documentation/power/pci.rst
@@ -1029,7 +1029,7 @@ into D0 going forward), but if it is in runtime suspend in pci_pm_thaw_noirq(),
 the function will set the power.direct_complete flag for it (to make the PM core
 skip the subsequent "thaw" callbacks for it) and return.
 
-Setting the DPM_FLAG_LEAVE_SUSPENDED flag means that the driver prefers the
+Setting the DPM_FLAG_MAY_SKIP_RESUME flag means that the driver prefers the
 device to be left in suspend after system-wide transitions to the working state.
 This flag is checked by the PM core, but the PCI bus type informs the PM core
 which devices may be left in suspend from its perspective (that happens during
diff --git a/drivers/acpi/acpi_tad.c b/drivers/acpi/acpi_tad.c
index 33a4bcdaa4d7..7d45cce0c3c1 100644
--- a/drivers/acpi/acpi_tad.c
+++ b/drivers/acpi/acpi_tad.c
@@ -624,7 +624,7 @@ static int acpi_tad_probe(struct platform_device *pdev)
 	 */
 	device_init_wakeup(dev, true);
 	dev_pm_set_driver_flags(dev, DPM_FLAG_SMART_SUSPEND |
-				     DPM_FLAG_LEAVE_SUSPENDED);
+				     DPM_FLAG_MAY_SKIP_RESUME);
 	/*
 	 * The platform bus type layer tells the ACPI PM domain powers up the
 	 * device, so set the runtime PM status of it to "active".
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index dbc1e5e7346b..aaa4aaf41d27 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -1247,7 +1247,7 @@ Skip:
 	 * to be skipped.
 	 */
 	if (atomic_read(&dev->power.usage_count) > 1 ||
-	    !(dev_pm_test_driver_flags(dev, DPM_FLAG_LEAVE_SUSPENDED) &&
+	    !(dev_pm_test_driver_flags(dev, DPM_FLAG_MAY_SKIP_RESUME) &&
 	      dev->power.may_skip_resume))
 		dev->power.must_resume = true;
 
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 5536673060cc..c429d664f655 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -357,12 +357,12 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
 	if (dev->flags & ACCESS_NO_IRQ_SUSPEND) {
 		dev_pm_set_driver_flags(&pdev->dev,
 					DPM_FLAG_SMART_PREPARE |
-					DPM_FLAG_LEAVE_SUSPENDED);
+					DPM_FLAG_MAY_SKIP_RESUME);
 	} else {
 		dev_pm_set_driver_flags(&pdev->dev,
 					DPM_FLAG_SMART_PREPARE |
 					DPM_FLAG_SMART_SUSPEND |
-					DPM_FLAG_LEAVE_SUSPENDED);
+					DPM_FLAG_MAY_SKIP_RESUME);
 	}
 
 	/* The code below assumes runtime PM to be disabled. */
diff --git a/include/linux/pm.h b/include/linux/pm.h
index cdb8fbd6ab18..35796fc49e7a 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -547,7 +547,7 @@ struct pm_subsys_data {
  * NO_DIRECT_COMPLETE: Do not apply direct-complete optimization to the device.
  * SMART_PREPARE: Check the return value of the driver's ->prepare callback.
  * SMART_SUSPEND: No need to resume the device from runtime suspend.
- * LEAVE_SUSPENDED: Avoid resuming the device during system resume if possible.
+ * MAY_SKIP_RESUME: Avoid resuming the device during system resume if possible.
  *
  * Setting SMART_PREPARE instructs bus types and PM domains which may want
  * system suspend/resume callbacks to be skipped for the device to return 0 from
@@ -562,13 +562,13 @@ struct pm_subsys_data {
  * invocations of the ->suspend_late and ->suspend_noirq callbacks provided by
  * the driver if they decide to leave the device in runtime suspend.
  *
- * Setting LEAVE_SUSPENDED informs the PM core and middle-layer code that the
+ * Setting MAY_SKIP_RESUME informs the PM core and middle-layer code that the
  * driver prefers the device to be left in suspend after system resume.
  */
 #define DPM_FLAG_NO_DIRECT_COMPLETE	BIT(0)
 #define DPM_FLAG_SMART_PREPARE		BIT(1)
 #define DPM_FLAG_SMART_SUSPEND		BIT(2)
-#define DPM_FLAG_LEAVE_SUSPENDED	BIT(3)
+#define DPM_FLAG_MAY_SKIP_RESUME	BIT(3)
 
 struct dev_pm_info {
 	pm_message_t		power_state;
-- 
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