Linux-ACPI Archive on lore.kernel.org
 help / color / Atom feed
From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Hans de Goede <hdegoede@redhat.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-acpi@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 449/671] ACPI: PM: Introduce "poweroff" callbacks for ACPI PM domain and LPSS
Date: Thu, 16 Jan 2020 12:01:27 -0500
Message-ID: <20200116170509.12787-186-sashal@kernel.org> (raw)
In-Reply-To: <20200116170509.12787-1-sashal@kernel.org>

From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

[ Upstream commit c95b7595f85c688d5c569ddbbd6ab6a4bdae2f36 ]

In general, it is not correct to call pm_generic_suspend(),
pm_generic_suspend_late() and pm_generic_suspend_noirq() during the
hibernation's "poweroff" transition, because device drivers may
provide special callbacks to be invoked then and the wrappers in
question cause system suspend callbacks to be run.  Unfortunately,
that happens in the ACPI PM domain and ACPI LPSS.

To address this potential issue, introduce "poweroff" callbacks
for the ACPI PM and LPSS that will use pm_generic_poweroff(),
pm_generic_poweroff_late() and pm_generic_poweroff_noirq() as
appropriate.

Fixes: 05087360fd7a (ACPI / PM: Take SMART_SUSPEND driver flag into account)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/acpi/acpi_lpss.c | 50 +++++++++++++++++++++++++++++++---
 drivers/acpi/device_pm.c | 58 +++++++++++++++++++++++++++++++++++++---
 include/linux/acpi.h     |  2 ++
 3 files changed, 104 insertions(+), 6 deletions(-)

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 11c460ab9de9..ded6c5c17fd7 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -1056,6 +1056,13 @@ static int acpi_lpss_suspend_noirq(struct device *dev)
 	int ret;
 
 	if (pdata->dev_desc->resume_from_noirq) {
+		/*
+		 * The driver's ->suspend_late callback will be invoked by
+		 * acpi_lpss_do_suspend_late(), with the assumption that the
+		 * driver really wanted to run that code in ->suspend_noirq, but
+		 * it could not run after acpi_dev_suspend() and the driver
+		 * expected the latter to be called in the "late" phase.
+		 */
 		ret = acpi_lpss_do_suspend_late(dev);
 		if (ret)
 			return ret;
@@ -1142,6 +1149,43 @@ static int acpi_lpss_restore_noirq(struct device *dev)
 	/* This is analogous to what happens in acpi_lpss_resume_noirq(). */
 	return acpi_lpss_do_restore_early(dev);
 }
+
+static int acpi_lpss_do_poweroff_late(struct device *dev)
+{
+	int ret = pm_generic_poweroff_late(dev);
+
+	return ret ? ret : acpi_lpss_suspend(dev, device_may_wakeup(dev));
+}
+
+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))
+		return 0;
+
+	if (pdata->dev_desc->resume_from_noirq)
+		return 0;
+
+	return acpi_lpss_do_poweroff_late(dev);
+}
+
+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))
+		return 0;
+
+	if (pdata->dev_desc->resume_from_noirq) {
+		/* This is analogous to the acpi_lpss_suspend_noirq() case. */
+		int ret = acpi_lpss_do_poweroff_late(dev);
+		if (ret)
+			return ret;
+	}
+
+	return pm_generic_poweroff_noirq(dev);
+}
 #endif /* CONFIG_PM_SLEEP */
 
 static int acpi_lpss_runtime_suspend(struct device *dev)
@@ -1175,9 +1219,9 @@ static struct dev_pm_domain acpi_lpss_pm_domain = {
 		.resume_noirq = acpi_lpss_resume_noirq,
 		.resume_early = acpi_lpss_resume_early,
 		.freeze = acpi_subsys_freeze,
-		.poweroff = acpi_subsys_suspend,
-		.poweroff_late = acpi_lpss_suspend_late,
-		.poweroff_noirq = acpi_lpss_suspend_noirq,
+		.poweroff = acpi_subsys_poweroff,
+		.poweroff_late = acpi_lpss_poweroff_late,
+		.poweroff_noirq = acpi_lpss_poweroff_noirq,
 		.restore_noirq = acpi_lpss_restore_noirq,
 		.restore_early = acpi_lpss_restore_early,
 #endif
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 5a88a63e902d..54b6547d32b2 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1137,6 +1137,58 @@ int acpi_subsys_restore_early(struct device *dev)
 	return ret ? ret : pm_generic_restore_early(dev);
 }
 EXPORT_SYMBOL_GPL(acpi_subsys_restore_early);
+
+/**
+ * acpi_subsys_poweroff - Run the device driver's poweroff callback.
+ * @dev: Device to handle.
+ *
+ * Follow PCI and resume devices from runtime suspend before running their
+ * system poweroff 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_poweroff(struct device *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_poweroff(dev);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_poweroff);
+
+/**
+ * acpi_subsys_poweroff_late - Run the device driver's poweroff callback.
+ * @dev: Device to handle.
+ *
+ * Carry out the generic late poweroff procedure for @dev and use ACPI to put
+ * it into a low-power state during system transition into a sleep state.
+ */
+static int acpi_subsys_poweroff_late(struct device *dev)
+{
+	int ret;
+
+	if (dev_pm_smart_suspend_and_suspended(dev))
+		return 0;
+
+	ret = pm_generic_poweroff_late(dev);
+	if (ret)
+		return ret;
+
+	return acpi_dev_suspend(dev, device_may_wakeup(dev));
+}
+
+/**
+ * acpi_subsys_poweroff_noirq - Run the driver's "noirq" poweroff callback.
+ * @dev: Device to suspend.
+ */
+static int acpi_subsys_poweroff_noirq(struct device *dev)
+{
+	if (dev_pm_smart_suspend_and_suspended(dev))
+		return 0;
+
+	return pm_generic_poweroff_noirq(dev);
+}
 #endif /* CONFIG_PM_SLEEP */
 
 static struct dev_pm_domain acpi_general_pm_domain = {
@@ -1152,9 +1204,9 @@ static struct dev_pm_domain acpi_general_pm_domain = {
 		.resume_noirq = acpi_subsys_resume_noirq,
 		.resume_early = acpi_subsys_resume_early,
 		.freeze = acpi_subsys_freeze,
-		.poweroff = acpi_subsys_suspend,
-		.poweroff_late = acpi_subsys_suspend_late,
-		.poweroff_noirq = acpi_subsys_suspend_noirq,
+		.poweroff = acpi_subsys_poweroff,
+		.poweroff_late = acpi_subsys_poweroff_late,
+		.poweroff_noirq = acpi_subsys_poweroff_noirq,
 		.restore_early = acpi_subsys_restore_early,
 #endif
 	},
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 32fabeeda5e3..cd412817654f 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -919,6 +919,7 @@ int acpi_subsys_suspend_late(struct device *dev);
 int acpi_subsys_suspend_noirq(struct device *dev);
 int acpi_subsys_suspend(struct device *dev);
 int acpi_subsys_freeze(struct device *dev);
+int acpi_subsys_poweroff(struct device *dev);
 #else
 static inline int acpi_dev_resume_early(struct device *dev) { return 0; }
 static inline int acpi_subsys_prepare(struct device *dev) { return 0; }
@@ -927,6 +928,7 @@ static inline int acpi_subsys_suspend_late(struct device *dev) { return 0; }
 static inline int acpi_subsys_suspend_noirq(struct device *dev) { return 0; }
 static inline int acpi_subsys_suspend(struct device *dev) { return 0; }
 static inline int acpi_subsys_freeze(struct device *dev) { return 0; }
+static inline int acpi_subsys_poweroff(struct device *dev) { return 0; }
 #endif
 
 #ifdef CONFIG_ACPI
-- 
2.20.1


      parent reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116170509.12787-1-sashal@kernel.org>
2020-01-16 16:58 ` [PATCH AUTOSEL 4.19 286/671] ACPI: button: reinitialize button state upon resume Sasha Levin
2020-01-16 17:01 ` [PATCH AUTOSEL 4.19 447/671] PM: ACPI/PCI: Resume all devices during hibernation Sasha Levin
2020-01-16 17:01 ` [PATCH AUTOSEL 4.19 448/671] ACPI: PM: Simplify and fix PM domain hibernation callbacks Sasha Levin
2020-01-16 17:01 ` Sasha Levin [this message]

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200116170509.12787-186-sashal@kernel.org \
    --to=sashal@kernel.org \
    --cc=hdegoede@redhat.com \
    --cc=linux-acpi@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mika.westerberg@linux.intel.com \
    --cc=rafael.j.wysocki@intel.com \
    --cc=stable@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-ACPI Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-acpi/0 linux-acpi/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-acpi linux-acpi/ https://lore.kernel.org/linux-acpi \
		linux-acpi@vger.kernel.org
	public-inbox-index linux-acpi

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-acpi


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git