From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux PM <linux-pm@vger.kernel.org>,
Alan Stern <stern@rowland.harvard.edu>
Cc: Linux ACPI <linux-acpi@vger.kernel.org>,
Linux PCI <linux-pci@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Bjorn Helgaas <helgaas@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Hans De Goede <hdegoede@redhat.com>,
Ulf Hansson <ulf.hansson@linaro.org>
Subject: [PATCH v2 4/9] PM: sleep: core: Rework the power.may_skip_resume handling
Date: Sat, 18 Apr 2020 18:52:19 +0200 [thread overview]
Message-ID: <4410060.DOjU9hYLuO@kreacher> (raw)
In-Reply-To: <5673945.BT02kTCndr@kreacher>
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
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.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
New patch.
---
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(-)
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 @@ static int pci_pm_suspend_noirq(struct device *dev)
* 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;
}
--
2.16.4
next prev parent reply other threads:[~2020-04-18 17:12 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-10 15:46 [PATCH 0/7] PM: sleep: core: Rearrange the handling of driver power management flags Rafael J. Wysocki
2020-04-10 15:48 ` [PATCH 1/7] PM: sleep: core: Simplify the SMART_SUSPEND flag handling Rafael J. Wysocki
2020-04-10 15:48 ` [PATCH 2/7] PM: sleep: core: Fold functions into their callers Rafael J. Wysocki
2020-04-10 15:51 ` [PATCH 3/7] PM: sleep: core: Do not skip callbacks in the resume phase Rafael J. Wysocki
2020-04-10 15:51 ` [PATCH 4/7] PM: sleep: core: Rename dev_pm_may_skip_resume() Rafael J. Wysocki
2020-04-10 15:56 ` [PATCH 5/7] PM: sleep: core: Rename DPM_FLAG_NEVER_SKIP Rafael J. Wysocki
2020-04-10 19:38 ` Bjorn Helgaas
2020-04-13 6:35 ` Jeff Kirsher
2020-04-10 15:57 ` [PATCH 6/7] PM: sleep: core: Rename DPM_FLAG_LEAVE_SUSPENDED Rafael J. Wysocki
2020-04-15 9:51 ` Wolfram Sang
2020-04-10 15:58 ` [PATCH 7/7] Documentation: PM: sleep: Update driver flags documentation Rafael J. Wysocki
2020-04-13 13:11 ` [PATCH 0/7] PM: sleep: core: Rearrange the handling of driver power management flags Hans de Goede
2020-04-18 16:23 ` [PATCH v2 0/9] " Rafael J. Wysocki
2020-04-18 16:29 ` [PATCH v2 1/9] PM: sleep: core: Simplify the SMART_SUSPEND flag handling Rafael J. Wysocki
2020-04-18 16:51 ` [PATCH v2 2/9] PM: sleep: core: Fold functions into their callers Rafael J. Wysocki
2020-04-18 16:52 ` [PATCH v2 3/9] PM: sleep: core: Do not skip callbacks in the resume phase Rafael J. Wysocki
2020-04-18 16:52 ` Rafael J. Wysocki [this message]
2020-04-18 16:52 ` [PATCH v2 5/9] PM: sleep: core: Rename dev_pm_may_skip_resume() Rafael J. Wysocki
2020-04-18 16:52 ` [PATCH v2 6/9] PM: sleep: core: Rename dev_pm_smart_suspend_and_suspended() Rafael J. Wysocki
2020-04-18 16:53 ` [PATCH v2 7/9] PM: sleep: core: Rename DPM_FLAG_NEVER_SKIP Rafael J. Wysocki
2020-04-22 20:10 ` Alex Deucher
2020-04-18 16:53 ` [PATCH v2 8/9] PM: sleep: core: Rename DPM_FLAG_LEAVE_SUSPENDED Rafael J. Wysocki
2020-04-18 16:55 ` [PATCH v2 9/9] Documentation: PM: sleep: Update driver flags documentation Rafael J. Wysocki
2020-04-18 18:00 ` [PATCH v2 0/9] PM: sleep: core: Rearrange the handling of driver power management flags Alan Stern
2020-04-18 18:08 ` Rafael J. Wysocki
2020-04-18 19:41 ` Alan Stern
2020-04-19 14:43 ` Alan Stern
2020-04-19 15:13 ` Rafael J. Wysocki
2020-04-21 10:30 ` Ulf Hansson
2020-04-21 11:32 ` Rafael J. Wysocki
2020-04-23 17:07 ` Bjorn Helgaas
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