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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-22 17:28:59 -1000
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-22 17:28:59 -1000
commit6876eb3720813560c4c6728d6347da6558c53df7 (patch)
treefd10993f69c3f880305a331e96a260f4b2df9fed
parentd32e5f44a5aeb9c1febaf16db45bf888a3f66725 (diff)
parentd84c97f8f77bc4124256e76864f125f45ad53744 (diff)
downloadlinux-stericsson-6876eb3720813560c4c6728d6347da6558c53df7.tar.gz
Merge tag 'pm-4.14-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki: "These fix a cpufreq regression introduced by recent changes related to the generic DT driver, an initialization time memory leak in cpuidle on ARM, a PM core bug that may cause system suspend/resume to fail on some systems, a request type validation issue in the PM QoS framework and two documentation-related issues. Specifics: - Fix a regression in cpufreq on systems using DT as the source of CPU configuration information where two different code paths attempt to create the cpufreq-dt device object (there can be only one) and fix up the "compatible" matching for some TI platforms on top of that (Viresh Kumar, Dave Gerlach). - Fix an initialization time memory leak in cpuidle on ARM which occurs if the cpuidle driver initialization fails (Stefan Wahren). - Fix a PM core function that checks whether or not there are any system suspend/resume callbacks for a device, but forgets to check legacy callbacks which then may be skipped incorrectly and the system may crash and/or the device may become unusable after a suspend-resume cycle (Rafael Wysocki). - Fix request type validation for latency tolerance PM QoS requests which may lead to unexpected behavior (Jan Schönherr). - Fix a broken link to PM documentation from a header file and a typo in a PM document (Geert Uytterhoeven, Rafael Wysocki)" * tag 'pm-4.14-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq: ti-cpufreq: Support additional am43xx platforms ARM: cpuidle: Avoid memleak if init fail cpufreq: dt-platdev: Add some missing platforms to the blacklist PM: core: Fix device_pm_check_callbacks() PM: docs: Drop an excess character from devices.rst PM / QoS: Use the correct variable to check the QoS request type driver core: Fix link to device power management documentation
-rw-r--r--Documentation/driver-api/pm/devices.rst2
-rw-r--r--drivers/base/power/main.c9
-rw-r--r--drivers/base/power/qos.c10
-rw-r--r--drivers/cpufreq/cpufreq-dt-platdev.c12
-rw-r--r--drivers/cpufreq/ti-cpufreq.c2
-rw-r--r--drivers/cpuidle/cpuidle-arm.c6
-rw-r--r--include/linux/device.h2
7 files changed, 30 insertions, 13 deletions
diff --git a/Documentation/driver-api/pm/devices.rst b/Documentation/driver-api/pm/devices.rst
index bedd32388dac..a0dc2879a152 100644
--- a/Documentation/driver-api/pm/devices.rst
+++ b/Documentation/driver-api/pm/devices.rst
@@ -675,7 +675,7 @@ sub-domain of the parent domain.
Support for power domains is provided through the :c:member:`pm_domain` field of
|struct device|. This field is a pointer to an object of type
-|struct dev_pm_domain|, defined in :file:`include/linux/pm.h``, providing a set
+|struct dev_pm_domain|, defined in :file:`include/linux/pm.h`, providing a set
of power management callbacks analogous to the subsystem-level and device driver
callbacks that are executed for the given device during all power transitions,
instead of the respective subsystem-level callbacks. Specifically, if a
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index ea1732ed7a9d..770b1539a083 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -1860,10 +1860,13 @@ void device_pm_check_callbacks(struct device *dev)
{
spin_lock_irq(&dev->power.lock);
dev->power.no_pm_callbacks =
- (!dev->bus || pm_ops_is_empty(dev->bus->pm)) &&
- (!dev->class || pm_ops_is_empty(dev->class->pm)) &&
+ (!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->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 || (pm_ops_is_empty(dev->driver->pm) &&
+ !dev->driver->suspend && !dev->driver->resume));
spin_unlock_irq(&dev->power.lock);
}
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index f850daeffba4..277d43a83f53 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -277,11 +277,11 @@ void dev_pm_qos_constraints_destroy(struct device *dev)
mutex_unlock(&dev_pm_qos_sysfs_mtx);
}
-static bool dev_pm_qos_invalid_request(struct device *dev,
- struct dev_pm_qos_request *req)
+static bool dev_pm_qos_invalid_req_type(struct device *dev,
+ enum dev_pm_qos_req_type type)
{
- return !req || (req->type == DEV_PM_QOS_LATENCY_TOLERANCE
- && !dev->power.set_latency_tolerance);
+ return type == DEV_PM_QOS_LATENCY_TOLERANCE &&
+ !dev->power.set_latency_tolerance;
}
static int __dev_pm_qos_add_request(struct device *dev,
@@ -290,7 +290,7 @@ static int __dev_pm_qos_add_request(struct device *dev,
{
int ret = 0;
- if (!dev || dev_pm_qos_invalid_request(dev, req))
+ if (!dev || !req || dev_pm_qos_invalid_req_type(dev, type))
return -EINVAL;
if (WARN(dev_pm_qos_request_active(req),
diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index a020da7940d6..430edadca527 100644
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -106,6 +106,18 @@ static const struct of_device_id whitelist[] __initconst = {
* platforms using "operating-points-v2" property.
*/
static const struct of_device_id blacklist[] __initconst = {
+ { .compatible = "calxeda,highbank", },
+ { .compatible = "calxeda,ecx-2000", },
+
+ { .compatible = "marvell,armadaxp", },
+
+ { .compatible = "nvidia,tegra124", },
+
+ { .compatible = "st,stih407", },
+ { .compatible = "st,stih410", },
+
+ { .compatible = "sigma,tango4", },
+
{ }
};
diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c
index b29cd3398463..4bf47de6101f 100644
--- a/drivers/cpufreq/ti-cpufreq.c
+++ b/drivers/cpufreq/ti-cpufreq.c
@@ -190,7 +190,7 @@ static int ti_cpufreq_setup_syscon_register(struct ti_cpufreq_data *opp_data)
static const struct of_device_id ti_cpufreq_of_match[] = {
{ .compatible = "ti,am33xx", .data = &am3x_soc_data, },
- { .compatible = "ti,am4372", .data = &am4x_soc_data, },
+ { .compatible = "ti,am43", .data = &am4x_soc_data, },
{ .compatible = "ti,dra7", .data = &dra7_soc_data },
{},
};
diff --git a/drivers/cpuidle/cpuidle-arm.c b/drivers/cpuidle/cpuidle-arm.c
index 7080c384ad5d..52a75053ee03 100644
--- a/drivers/cpuidle/cpuidle-arm.c
+++ b/drivers/cpuidle/cpuidle-arm.c
@@ -104,13 +104,13 @@ static int __init arm_idle_init(void)
ret = dt_init_idle_driver(drv, arm_idle_state_match, 1);
if (ret <= 0) {
ret = ret ? : -ENODEV;
- goto out_fail;
+ goto init_fail;
}
ret = cpuidle_register_driver(drv);
if (ret) {
pr_err("Failed to register cpuidle driver\n");
- goto out_fail;
+ goto init_fail;
}
/*
@@ -149,6 +149,8 @@ static int __init arm_idle_init(void)
}
return 0;
+init_fail:
+ kfree(drv);
out_fail:
while (--cpu >= 0) {
dev = per_cpu(cpuidle_devices, cpu);
diff --git a/include/linux/device.h b/include/linux/device.h
index c6f27207dbe8..1d2607923a24 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -838,7 +838,7 @@ struct dev_links_info {
* @driver_data: Private pointer for driver specific info.
* @links: Links to suppliers and consumers of this device.
* @power: For device power management.
- * See Documentation/power/admin-guide/devices.rst for details.
+ * See Documentation/driver-api/pm/devices.rst for details.
* @pm_domain: Provide callbacks that are executed during system suspend,
* hibernation, system resume and during runtime PM transitions
* along with subsystem-level and driver-level callbacks.