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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-11-13 01:41:26 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-11-13 01:41:26 +0100
commit1efef68262dc567f0c09da9d11924e8287cd3a8b (patch)
treeef4534f2683ea2e5bb6b1091d3b910f8d0181fbf /drivers
parent05d658b5b57214944067fb4f62bce59200bf496f (diff)
parent05087360fd7acf2cc9b7bbb243c12765c44c7693 (diff)
Merge branch 'pm-core'
* pm-core: ACPI / PM: Take SMART_SUSPEND driver flag into account PCI / PM: Take SMART_SUSPEND driver flag into account PCI / PM: Drop unnecessary invocations of pcibios_pm_ops callbacks PM / core: Add SMART_SUSPEND driver flag PCI / PM: Use the NEVER_SKIP driver flag PM / core: Add NEVER_SKIP and SMART_PREPARE driver flags PM / core: Convert timers to use timer_setup() PM / core: Fix kerneldoc comments of four functions PM / core: Drop legacy class suspend/resume operations
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/acpi_lpss.c13
-rw-r--r--drivers/acpi/device_pm.c124
-rw-r--r--drivers/base/dd.c2
-rw-r--r--drivers/base/power/main.c53
-rw-r--r--drivers/base/power/runtime.c7
-rw-r--r--drivers/base/power/wakeup.c11
-rw-r--r--drivers/gpu/drm/i915/i915_drv.c2
-rw-r--r--drivers/misc/mei/pci-me.c2
-rw-r--r--drivers/misc/mei/pci-txe.c2
-rw-r--r--drivers/pci/pci-driver.c124
-rw-r--r--drivers/pci/pci.c3
11 files changed, 252 insertions, 91 deletions
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 04d32bdb5a95..de7385b824e1 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -849,8 +849,12 @@ static int acpi_lpss_resume(struct device *dev)
#ifdef CONFIG_PM_SLEEP
static int acpi_lpss_suspend_late(struct device *dev)
{
- int ret = pm_generic_suspend_late(dev);
+ int ret;
+
+ if (dev_pm_smart_suspend_and_suspended(dev))
+ return 0;
+ ret = pm_generic_suspend_late(dev);
return ret ? ret : acpi_lpss_suspend(dev, device_may_wakeup(dev));
}
@@ -889,10 +893,17 @@ static struct dev_pm_domain acpi_lpss_pm_domain = {
.complete = acpi_subsys_complete,
.suspend = acpi_subsys_suspend,
.suspend_late = acpi_lpss_suspend_late,
+ .suspend_noirq = acpi_subsys_suspend_noirq,
+ .resume_noirq = acpi_subsys_resume_noirq,
.resume_early = acpi_lpss_resume_early,
.freeze = acpi_subsys_freeze,
+ .freeze_late = acpi_subsys_freeze_late,
+ .freeze_noirq = acpi_subsys_freeze_noirq,
+ .thaw_noirq = acpi_subsys_thaw_noirq,
.poweroff = acpi_subsys_suspend,
.poweroff_late = acpi_lpss_suspend_late,
+ .poweroff_noirq = acpi_subsys_suspend_noirq,
+ .restore_noirq = acpi_subsys_resume_noirq,
.restore_early = acpi_lpss_resume_early,
#endif
.runtime_suspend = acpi_lpss_runtime_suspend,
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 69ffd1dc1de7..e4ffaeec9ec2 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -939,7 +939,8 @@ static bool acpi_dev_needs_resume(struct device *dev, struct acpi_device *adev)
u32 sys_target = acpi_target_system_state();
int ret, state;
- if (device_may_wakeup(dev) != !!adev->wakeup.prepare_count)
+ if (!pm_runtime_suspended(dev) || !adev ||
+ device_may_wakeup(dev) != !!adev->wakeup.prepare_count)
return true;
if (sys_target == ACPI_STATE_S0)
@@ -962,14 +963,16 @@ static bool acpi_dev_needs_resume(struct device *dev, struct acpi_device *adev)
int acpi_subsys_prepare(struct device *dev)
{
struct acpi_device *adev = ACPI_COMPANION(dev);
- int ret;
- ret = pm_generic_prepare(dev);
- if (ret < 0)
- return ret;
+ if (dev->driver && dev->driver->pm && dev->driver->pm->prepare) {
+ int ret = dev->driver->pm->prepare(dev);
- if (!adev || !pm_runtime_suspended(dev))
- return 0;
+ if (ret < 0)
+ return ret;
+
+ if (!ret && dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_PREPARE))
+ return 0;
+ }
return !acpi_dev_needs_resume(dev, adev);
}
@@ -996,12 +999,17 @@ EXPORT_SYMBOL_GPL(acpi_subsys_complete);
* acpi_subsys_suspend - Run the device driver's suspend callback.
* @dev: Device to handle.
*
- * Follow PCI and resume devices suspended at run time before running their
- * system suspend callbacks.
+ * Follow PCI and resume devices from runtime suspend before running their
+ * system suspend callbacks, unless the driver can cope with runtime-suspended
+ * devices during system suspend and there are no ACPI-specific reasons for
+ * resuming them.
*/
int acpi_subsys_suspend(struct device *dev)
{
- pm_runtime_resume(dev);
+ if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) ||
+ acpi_dev_needs_resume(dev, ACPI_COMPANION(dev)))
+ pm_runtime_resume(dev);
+
return pm_generic_suspend(dev);
}
EXPORT_SYMBOL_GPL(acpi_subsys_suspend);
@@ -1015,12 +1023,48 @@ EXPORT_SYMBOL_GPL(acpi_subsys_suspend);
*/
int acpi_subsys_suspend_late(struct device *dev)
{
- int ret = pm_generic_suspend_late(dev);
+ int ret;
+
+ if (dev_pm_smart_suspend_and_suspended(dev))
+ return 0;
+
+ ret = pm_generic_suspend_late(dev);
return ret ? ret : acpi_dev_suspend(dev, device_may_wakeup(dev));
}
EXPORT_SYMBOL_GPL(acpi_subsys_suspend_late);
/**
+ * acpi_subsys_suspend_noirq - Run the device driver's "noirq" suspend callback.
+ * @dev: Device to suspend.
+ */
+int acpi_subsys_suspend_noirq(struct device *dev)
+{
+ if (dev_pm_smart_suspend_and_suspended(dev))
+ return 0;
+
+ return pm_generic_suspend_noirq(dev);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_suspend_noirq);
+
+/**
+ * acpi_subsys_resume_noirq - Run the device driver's "noirq" resume callback.
+ * @dev: Device to handle.
+ */
+int acpi_subsys_resume_noirq(struct device *dev)
+{
+ /*
+ * 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);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_resume_noirq);
+
+/**
* acpi_subsys_resume_early - Resume device using ACPI.
* @dev: Device to Resume.
*
@@ -1047,11 +1091,60 @@ int acpi_subsys_freeze(struct device *dev)
* runtime-suspended devices should not be touched during freeze/thaw
* transitions.
*/
- pm_runtime_resume(dev);
+ if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND))
+ pm_runtime_resume(dev);
+
return pm_generic_freeze(dev);
}
EXPORT_SYMBOL_GPL(acpi_subsys_freeze);
+/**
+ * acpi_subsys_freeze_late - Run the device driver's "late" freeze callback.
+ * @dev: Device to handle.
+ */
+int acpi_subsys_freeze_late(struct device *dev)
+{
+
+ if (dev_pm_smart_suspend_and_suspended(dev))
+ return 0;
+
+ return pm_generic_freeze_late(dev);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_freeze_late);
+
+/**
+ * acpi_subsys_freeze_noirq - Run the device driver's "noirq" freeze callback.
+ * @dev: Device to handle.
+ */
+int acpi_subsys_freeze_noirq(struct device *dev)
+{
+
+ if (dev_pm_smart_suspend_and_suspended(dev))
+ return 0;
+
+ return pm_generic_freeze_noirq(dev);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_freeze_noirq);
+
+/**
+ * acpi_subsys_thaw_noirq - Run the device driver's "noirq" thaw callback.
+ * @dev: Device to handle.
+ */
+int acpi_subsys_thaw_noirq(struct device *dev)
+{
+ /*
+ * If the device is in runtime suspend, the "thaw" code may not work
+ * correctly with it, so skip the driver callback and make the PM core
+ * skip all of the subsequent "thaw" callbacks for the device.
+ */
+ if (dev_pm_smart_suspend_and_suspended(dev)) {
+ dev->power.direct_complete = true;
+ return 0;
+ }
+
+ return pm_generic_thaw_noirq(dev);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_thaw_noirq);
#endif /* CONFIG_PM_SLEEP */
static struct dev_pm_domain acpi_general_pm_domain = {
@@ -1063,10 +1156,17 @@ static struct dev_pm_domain acpi_general_pm_domain = {
.complete = acpi_subsys_complete,
.suspend = acpi_subsys_suspend,
.suspend_late = acpi_subsys_suspend_late,
+ .suspend_noirq = acpi_subsys_suspend_noirq,
+ .resume_noirq = acpi_subsys_resume_noirq,
.resume_early = acpi_subsys_resume_early,
.freeze = acpi_subsys_freeze,
+ .freeze_late = acpi_subsys_freeze_late,
+ .freeze_noirq = acpi_subsys_freeze_noirq,
+ .thaw_noirq = acpi_subsys_thaw_noirq,
.poweroff = acpi_subsys_suspend,
.poweroff_late = acpi_subsys_suspend_late,
+ .poweroff_noirq = acpi_subsys_suspend_noirq,
+ .restore_noirq = acpi_subsys_resume_noirq,
.restore_early = acpi_subsys_resume_early,
#endif
},
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index ad44b40fe284..45575e134696 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -464,6 +464,7 @@ pinctrl_bind_failed:
if (dev->pm_domain && dev->pm_domain->dismiss)
dev->pm_domain->dismiss(dev);
pm_runtime_reinit(dev);
+ dev_pm_set_driver_flags(dev, 0);
switch (ret) {
case -EPROBE_DEFER:
@@ -869,6 +870,7 @@ static void __device_release_driver(struct device *dev, struct device *parent)
if (dev->pm_domain && dev->pm_domain->dismiss)
dev->pm_domain->dismiss(dev);
pm_runtime_reinit(dev);
+ dev_pm_set_driver_flags(dev, 0);
klist_remove(&dev->p->knode_driver);
device_pm_check_callbacks(dev);
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 770b1539a083..6c6f1c74c24c 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -528,7 +528,7 @@ static void dpm_watchdog_clear(struct dpm_watchdog *wd)
/*------------------------- Resume routines -------------------------*/
/**
- * device_resume_noirq - Execute an "early resume" callback for given device.
+ * device_resume_noirq - Execute a "noirq resume" callback for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
* @async: If true, the device is being resumed asynchronously.
@@ -848,16 +848,10 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
goto Driver;
}
- if (dev->class) {
- if (dev->class->pm) {
- info = "class ";
- callback = pm_op(dev->class->pm, state);
- goto Driver;
- } else if (dev->class->resume) {
- info = "legacy class ";
- callback = dev->class->resume;
- goto End;
- }
+ if (dev->class && dev->class->pm) {
+ info = "class ";
+ callback = pm_op(dev->class->pm, state);
+ goto Driver;
}
if (dev->bus) {
@@ -1083,7 +1077,7 @@ static pm_message_t resume_event(pm_message_t sleep_state)
}
/**
- * device_suspend_noirq - Execute a "late suspend" callback for given device.
+ * __device_suspend_noirq - Execute a "noirq suspend" callback for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
* @async: If true, the device is being suspended asynchronously.
@@ -1243,7 +1237,7 @@ int dpm_suspend_noirq(pm_message_t state)
}
/**
- * device_suspend_late - Execute a "late suspend" callback for given device.
+ * __device_suspend_late - Execute a "late suspend" callback for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
* @async: If true, the device is being suspended asynchronously.
@@ -1445,7 +1439,7 @@ static void dpm_clear_suppliers_direct_complete(struct device *dev)
}
/**
- * device_suspend - Execute "suspend" callbacks for given device.
+ * __device_suspend - Execute "suspend" callbacks for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
* @async: If true, the device is being suspended asynchronously.
@@ -1508,17 +1502,10 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
goto Run;
}
- if (dev->class) {
- if (dev->class->pm) {
- info = "class ";
- callback = pm_op(dev->class->pm, state);
- goto Run;
- } else if (dev->class->suspend) {
- pm_dev_dbg(dev, state, "legacy class ");
- error = legacy_suspend(dev, state, dev->class->suspend,
- "legacy class ");
- goto End;
- }
+ if (dev->class && dev->class->pm) {
+ info = "class ";
+ callback = pm_op(dev->class->pm, state);
+ goto Run;
}
if (dev->bus) {
@@ -1665,6 +1652,9 @@ static int device_prepare(struct device *dev, pm_message_t state)
if (dev->power.syscore)
return 0;
+ WARN_ON(dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) &&
+ !pm_runtime_enabled(dev));
+
/*
* If a device's parent goes into runtime suspend at the wrong time,
* it won't be possible to resume the device. To prevent this we
@@ -1713,7 +1703,9 @@ unlock:
* applies to suspend transitions, however.
*/
spin_lock_irq(&dev->power.lock);
- dev->power.direct_complete = ret > 0 && state.event == PM_EVENT_SUSPEND;
+ dev->power.direct_complete = state.event == PM_EVENT_SUSPEND &&
+ pm_runtime_suspended(dev) && ret > 0 &&
+ !dev_pm_test_driver_flags(dev, DPM_FLAG_NEVER_SKIP);
spin_unlock_irq(&dev->power.lock);
return 0;
}
@@ -1862,11 +1854,16 @@ void device_pm_check_callbacks(struct device *dev)
dev->power.no_pm_callbacks =
(!dev->bus || (pm_ops_is_empty(dev->bus->pm) &&
!dev->bus->suspend && !dev->bus->resume)) &&
- (!dev->class || (pm_ops_is_empty(dev->class->pm) &&
- !dev->class->suspend && !dev->class->resume)) &&
+ (!dev->class || pm_ops_is_empty(dev->class->pm)) &&
(!dev->type || pm_ops_is_empty(dev->type->pm)) &&
(!dev->pm_domain || pm_ops_is_empty(&dev->pm_domain->ops)) &&
(!dev->driver || (pm_ops_is_empty(dev->driver->pm) &&
!dev->driver->suspend && !dev->driver->resume));
spin_unlock_irq(&dev->power.lock);
}
+
+bool dev_pm_smart_suspend_and_suspended(struct device *dev)
+{
+ return dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) &&
+ pm_runtime_status_suspended(dev);
+}
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 13e015905543..e57b5d2f81cf 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -894,9 +894,9 @@ static void pm_runtime_work(struct work_struct *work)
*
* Check if the time is right and queue a suspend request.
*/
-static void pm_suspend_timer_fn(unsigned long data)
+static void pm_suspend_timer_fn(struct timer_list *t)
{
- struct device *dev = (struct device *)data;
+ struct device *dev = from_timer(dev, t, power.suspend_timer);
unsigned long flags;
unsigned long expires;
@@ -1499,8 +1499,7 @@ void pm_runtime_init(struct device *dev)
INIT_WORK(&dev->power.work, pm_runtime_work);
dev->power.timer_expires = 0;
- setup_timer(&dev->power.suspend_timer, pm_suspend_timer_fn,
- (unsigned long)dev);
+ timer_setup(&dev->power.suspend_timer, pm_suspend_timer_fn, 0);
init_waitqueue_head(&dev->power.wait_queue);
}
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index cdd6f256da59..680ee1d36ac9 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -54,7 +54,7 @@ static unsigned int saved_count;
static DEFINE_SPINLOCK(events_lock);
-static void pm_wakeup_timer_fn(unsigned long data);
+static void pm_wakeup_timer_fn(struct timer_list *t);
static LIST_HEAD(wakeup_sources);
@@ -176,7 +176,7 @@ void wakeup_source_add(struct wakeup_source *ws)
return;
spin_lock_init(&ws->lock);
- setup_timer(&ws->timer, pm_wakeup_timer_fn, (unsigned long)ws);
+ timer_setup(&ws->timer, pm_wakeup_timer_fn, 0);
ws->active = false;
ws->last_time = ktime_get();
@@ -481,8 +481,7 @@ static bool wakeup_source_not_registered(struct wakeup_source *ws)
* Use timer struct to check if the given source is initialized
* by wakeup_source_add.
*/
- return ws->timer.function != pm_wakeup_timer_fn ||
- ws->timer.data != (unsigned long)ws;
+ return ws->timer.function != (TIMER_FUNC_TYPE)pm_wakeup_timer_fn;
}
/*
@@ -724,9 +723,9 @@ EXPORT_SYMBOL_GPL(pm_relax);
* in @data if it is currently active and its timer has not been canceled and
* the expiration time of the timer is not in future.
*/
-static void pm_wakeup_timer_fn(unsigned long data)
+static void pm_wakeup_timer_fn(struct timer_list *t)
{
- struct wakeup_source *ws = (struct wakeup_source *)data;
+ struct wakeup_source *ws = from_timer(ws, t, timer);
unsigned long flags;
spin_lock_irqsave(&ws->lock, flags);
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 9f45cfeae775..f124de3a0668 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1304,7 +1304,7 @@ int i915_driver_load(struct pci_dev *pdev, const struct pci_device_id *ent)
* becaue the HDA driver may require us to enable the audio power
* domain during system suspend.
*/
- pdev->dev_flags |= PCI_DEV_FLAGS_NEEDS_RESUME;
+ dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
ret = i915_driver_init_early(dev_priv, ent);
if (ret < 0)
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 78b3172c8e6e..f4f17552c9b8 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -225,7 +225,7 @@ 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.
*/
- pdev->dev_flags |= PCI_DEV_FLAGS_NEEDS_RESUME;
+ dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
/*
* 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 0566f9bfa7de..e1b909123fb0 100644
--- a/drivers/misc/mei/pci-txe.c
+++ b/drivers/misc/mei/pci-txe.c
@@ -141,7 +141,7 @@ 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.
*/
- pdev->dev_flags |= PCI_DEV_FLAGS_NEEDS_RESUME;
+ dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
/*
* TXE maps runtime suspend/resume to own power gating states,
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 9be563067c0c..07b8a9b385ab 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -682,8 +682,11 @@ static int pci_pm_prepare(struct device *dev)
if (drv && drv->pm && drv->pm->prepare) {
int error = drv->pm->prepare(dev);
- if (error)
+ if (error < 0)
return error;
+
+ if (!error && dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_PREPARE))
+ return 0;
}
return pci_dev_keep_suspended(to_pci_dev(dev));
}
@@ -724,18 +727,25 @@ static int pci_pm_suspend(struct device *dev)
if (!pm) {
pci_pm_default_suspend(pci_dev);
- goto Fixup;
+ return 0;
}
/*
- * PCI devices suspended at run time need to be resumed at this point,
- * because in general it is necessary to reconfigure them for system
- * suspend. Namely, if the device is supposed to wake up the system
- * from the sleep state, we may need to reconfigure it for this purpose.
- * In turn, if the device is not supposed to wake up the system from the
- * sleep state, we'll have to prevent it from signaling wake-up.
+ * PCI devices suspended at run time may need to be resumed at this
+ * point, because in general it may be necessary to reconfigure them for
+ * system suspend. Namely, if the device is expected to wake up the
+ * system from the sleep state, it may have to be reconfigured for this
+ * purpose, or if the device is not expected to wake up the system from
+ * the sleep state, it should be prevented from signaling wakeup events
+ * going forward.
+ *
+ * Also if the driver of the device does not indicate that its system
+ * suspend callbacks can cope with runtime-suspended devices, it is
+ * better to resume the device from runtime suspend here.
*/
- pm_runtime_resume(dev);
+ if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) ||
+ !pci_dev_keep_suspended(pci_dev))
+ pm_runtime_resume(dev);
pci_dev->state_saved = false;
if (pm->suspend) {
@@ -755,17 +765,27 @@ static int pci_pm_suspend(struct device *dev)
}
}
- Fixup:
- pci_fixup_device(pci_fixup_suspend, pci_dev);
-
return 0;
}
+static int pci_pm_suspend_late(struct device *dev)
+{
+ if (dev_pm_smart_suspend_and_suspended(dev))
+ return 0;
+
+ pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev));
+
+ return pm_generic_suspend_late(dev);
+}
+
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))
+ return 0;
+
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
@@ -827,6 +847,14 @@ static int pci_pm_resume_noirq(struct device *dev)
struct device_driver *drv = dev->driver;
int error = 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);
+
pci_pm_default_resume_early(pci_dev);
if (pci_has_legacy_pm_support(pci_dev))
@@ -869,6 +897,7 @@ static int pci_pm_resume(struct device *dev)
#else /* !CONFIG_SUSPEND */
#define pci_pm_suspend NULL
+#define pci_pm_suspend_late NULL
#define pci_pm_suspend_noirq NULL
#define pci_pm_resume NULL
#define pci_pm_resume_noirq NULL
@@ -903,7 +932,8 @@ static int pci_pm_freeze(struct device *dev)
* devices should not be touched during freeze/thaw transitions,
* however.
*/
- pm_runtime_resume(dev);
+ if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND))
+ pm_runtime_resume(dev);
pci_dev->state_saved = false;
if (pm->freeze) {
@@ -915,17 +945,25 @@ static int pci_pm_freeze(struct device *dev)
return error;
}
- if (pcibios_pm_ops.freeze)
- return pcibios_pm_ops.freeze(dev);
-
return 0;
}
+static int pci_pm_freeze_late(struct device *dev)
+{
+ if (dev_pm_smart_suspend_and_suspended(dev))
+ return 0;
+
+ return pm_generic_freeze_late(dev);;
+}
+
static int pci_pm_freeze_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct device_driver *drv = dev->driver;
+ 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_FREEZE);
@@ -955,6 +993,16 @@ static int pci_pm_thaw_noirq(struct device *dev)
struct device_driver *drv = dev->driver;
int error = 0;
+ /*
+ * If the device is in runtime suspend, the code below may not work
+ * correctly with it, so skip that code and make the PM core skip all of
+ * the subsequent "thaw" callbacks for the device.
+ */
+ if (dev_pm_smart_suspend_and_suspended(dev)) {
+ dev->power.direct_complete = true;
+ return 0;
+ }
+
if (pcibios_pm_ops.thaw_noirq) {
error = pcibios_pm_ops.thaw_noirq(dev);
if (error)
@@ -979,12 +1027,6 @@ static int pci_pm_thaw(struct device *dev)
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int error = 0;
- if (pcibios_pm_ops.thaw) {
- error = pcibios_pm_ops.thaw(dev);
- if (error)
- return error;
- }
-
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_resume(dev);
@@ -1010,11 +1052,13 @@ static int pci_pm_poweroff(struct device *dev)
if (!pm) {
pci_pm_default_suspend(pci_dev);
- goto Fixup;
+ return 0;
}
/* The reason to do that is the same as in pci_pm_suspend(). */
- pm_runtime_resume(dev);
+ if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) ||
+ !pci_dev_keep_suspended(pci_dev))
+ pm_runtime_resume(dev);
pci_dev->state_saved = false;
if (pm->poweroff) {
@@ -1026,13 +1070,17 @@ static int pci_pm_poweroff(struct device *dev)
return error;
}
- Fixup:
- pci_fixup_device(pci_fixup_suspend, pci_dev);
+ return 0;
+}
- if (pcibios_pm_ops.poweroff)
- return pcibios_pm_ops.poweroff(dev);
+static int pci_pm_poweroff_late(struct device *dev)
+{
+ if (dev_pm_smart_suspend_and_suspended(dev))
+ return 0;
- return 0;
+ pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev));
+
+ return pm_generic_poweroff_late(dev);
}
static int pci_pm_poweroff_noirq(struct device *dev)
@@ -1040,6 +1088,9 @@ static int pci_pm_poweroff_noirq(struct device *dev)
struct pci_dev *pci_dev = to_pci_dev(dev);
struct device_driver *drv = dev->driver;
+ if (dev_pm_smart_suspend_and_suspended(dev))
+ return 0;
+
if (pci_has_legacy_pm_support(to_pci_dev(dev)))
return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
@@ -1081,6 +1132,10 @@ static int pci_pm_restore_noirq(struct device *dev)
struct device_driver *drv = dev->driver;
int error = 0;
+ /* This is analogous to the pci_pm_resume_noirq() case. */
+ if (dev_pm_smart_suspend_and_suspended(dev))
+ pm_runtime_set_active(dev);
+
if (pcibios_pm_ops.restore_noirq) {
error = pcibios_pm_ops.restore_noirq(dev);
if (error)
@@ -1104,12 +1159,6 @@ static int pci_pm_restore(struct device *dev)
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int error = 0;
- if (pcibios_pm_ops.restore) {
- error = pcibios_pm_ops.restore(dev);
- if (error)
- return error;
- }
-
/*
* This is necessary for the hibernation error path in which restore is
* called without restoring the standard config registers of the device.
@@ -1135,10 +1184,12 @@ static int pci_pm_restore(struct device *dev)
#else /* !CONFIG_HIBERNATE_CALLBACKS */
#define pci_pm_freeze NULL
+#define pci_pm_freeze_late NULL
#define pci_pm_freeze_noirq NULL
#define pci_pm_thaw NULL
#define pci_pm_thaw_noirq NULL
#define pci_pm_poweroff NULL
+#define pci_pm_poweroff_late NULL
#define pci_pm_poweroff_noirq NULL
#define pci_pm_restore NULL
#define pci_pm_restore_noirq NULL
@@ -1254,10 +1305,13 @@ static const struct dev_pm_ops pci_dev_pm_ops = {
.prepare = pci_pm_prepare,
.complete = pci_pm_complete,
.suspend = pci_pm_suspend,
+ .suspend_late = pci_pm_suspend_late,
.resume = pci_pm_resume,
.freeze = pci_pm_freeze,
+ .freeze_late = pci_pm_freeze_late,
.thaw = pci_pm_thaw,
.poweroff = pci_pm_poweroff,
+ .poweroff_late = pci_pm_poweroff_late,
.restore = pci_pm_restore,
.suspend_noirq = pci_pm_suspend_noirq,
.resume_noirq = pci_pm_resume_noirq,
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 6078dfc11b11..374f5686e2bc 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2166,8 +2166,7 @@ bool pci_dev_keep_suspended(struct pci_dev *pci_dev)
if (!pm_runtime_suspended(dev)
|| pci_target_state(pci_dev, wakeup) != pci_dev->current_state
- || platform_pci_need_resume(pci_dev)
- || (pci_dev->dev_flags & PCI_DEV_FLAGS_NEEDS_RESUME))
+ || platform_pci_need_resume(pci_dev))
return false;
/*

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