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authorLinus Torvalds <torvalds@linux-foundation.org>2022-12-12 13:19:07 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2022-12-12 13:19:07 -0800
commit045e222d0a9dcec152abe0633f538cafd965b12b (patch)
tree09db255e1ef5ff3a3d17bb6744662650cfb99244 /drivers/base/power
parent631aa744423173bf921191ba695bbc7c1aabd9e0 (diff)
parented6a00471dd444af085164f987e3d5e8145da35a (diff)
Merge tag 'pm-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki: "These include two new drivers (cpufreq driver for Apple SoC CPU P-states and the SCMI Powercap based power capping driver), other new hardware support and driver extensions (Qualcomm cpufreq driver and its DT bindings, TI cpufreq driver, intel_pstate, intel-uncore-freq), a bunch of fixes and cleanups all over and a cpupower utility update including new features related to RAPL support. Specifics: - Fix nasty and hard to debug race condition introduced by mistake in the runtime PM core code and clean up that code somewhat on top of the fix (Rafael Wysocki) - Generalize of_perf_domain_get_sharing_cpumask phandle format (Hector Martin) - Add new cpufreq driver for Apple SoC CPU P-states (Hector Martin) - Update Qualcomm cpufreq driver (Manivannan Sadhasivam, Chen Hui): - CPU clock provider support - Generic cleanups or reorganization - Potential memleak fix - Fix of the return value of cpufreq_driver->get() - Update Qualcomm cpufreq driver's DT bindings (Manivannan Sadhasivam, Rob Herring, Melody Olvera): - Support for CPU clock provider - Missing cache-related properties fixes - Support for QDU1000/QRU1000 - Add support for ti,am625 SoC and enable build of ti-cpufreq for ARCH_K3 (Dave Gerlach, and Vibhore Vardhan) - Use flexible array to simplify memory allocation in the tegra186 cpufreq driver (Christophe JAILLET) - Convert cpufreq statistics code to use sysfs_emit_at() (ye xingchen) - Allow intel_pstate to use no-HWP mode on Sapphire Rapids (Giovanni Gherdovich) - Add missing pci_dev_put() to the amd_freq_sensitivity cpufreq driver (Xiongfeng Wang) - Initialize the kobj_unregister completion before calling kobject_init_and_add() in the cpufreq core code (Yongqiang Liu) - Defer setting boost MSRs in the ACPI cpufreq driver (Stuart Hayes, Nathan Chancellor) - Make intel_pstate accept initial EPP value of 0x80 (Srinivas Pandruvada) - Make read-only array sys_clk_src in the SPEAr cpufreq driver static (Colin Ian King) - Make array speeds in the longhaul cpufreq driver static (Colin Ian King) - Use str_enabled_disabled() helper in the ACPI cpufreq driver (Andy Shevchenko) - Drop a reference to CVS from cpufreq documentation (Conghui Wang) - Improve kernel messages printed by the PSCI cpuidle driver (Ulf Hansson) - Make the DT cpuidle driver return the correct number of parsed idle states, clean it up and clarify a comment in it (Ulf Hansson) - Modify the tasks freezing code to avoid using pr_cont() and refine an error message printed by it (Rafael Wysocki) - Make the hibernation core code complain about memory map mismatches during resume to help diagnostics (Xueqin Luo) - Fix mistake in a kerneldoc comment in the hibernation code (xiongxin) - Reverse the order of performance and enabling operations in the generic power domains code (Abel Vesa) - Power off[on] domains in hibernate .freeze[thaw]_noirq hook of in the generic power domains code (Abel Vesa) - Consolidate genpd_restore_noirq() and genpd_resume_noirq() (Shawn Guo) - Pass generic PM noirq hooks to genpd_finish_suspend() (Shawn Guo) - Drop generic power domain status manipulation during hibernate restore (Shawn Guo) - Fix compiler warnings with make W=1 in the idle_inject power capping driver (Srinivas Pandruvada) - Use kstrtobool() instead of strtobool() in the power capping sysfs interface (Christophe JAILLET) - Add SCMI Powercap based power capping driver (Cristian Marussi) - Add Emerald Rapids support to the intel-uncore-freq driver (Artem Bityutskiy) - Repair slips in kernel-doc comments in the generic notifier code (Lukas Bulwahn) - Fix several DT issues in the OPP library reorganize code around opp-microvolt-<named> DT property (Viresh Kumar) - Allow any of opp-microvolt, opp-microamp, or opp-microwatt properties to be present without the others present (James Calligeros) - Fix clock-latency-ns property in DT example (Serge Semin) - Add a private governor_data for devfreq governors (Kant Fan) - Reorganize devfreq code to use device_match_of_node() and devm_platform_get_and_ioremap_resource() instead of open coding them (ye xingchen, Minghao Chi) - Make cpupower choose base_cpu to display default cpupower details instead of picking CPU 0 (Saket Kumar Bhaskar) - Add Georgian translation to cpupower documentation (Zurab Kargareteli) - Introduce powercap intel-rapl library, powercap-info command, and RAPL monitor into cpupower (Thomas Renninger)" * tag 'pm-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (64 commits) PM: runtime: Adjust white space in the core code cpufreq: Remove CVS version control contents from documentation cpufreq: stats: Convert to use sysfs_emit_at() API cpufreq: ACPI: Only set boost MSRs on supported CPUs PM: sleep: Refine error message in try_to_freeze_tasks() PM: sleep: Avoid using pr_cont() in the tasks freezing code PM: runtime: Relocate rpm_callback() right after __rpm_callback() PM: runtime: Do not call __rpm_callback() from rpm_idle() PM / devfreq: event: use devm_platform_get_and_ioremap_resource() PM / devfreq: event: Use device_match_of_node() PM / devfreq: Use device_match_of_node() powercap: idle_inject: Fix warnings with make W=1 PM: hibernate: Complain about memory map mismatches during resume dt-bindings: cpufreq: cpufreq-qcom-hw: Add QDU1000/QRU1000 cpufreq cpufreq: tegra186: Use flexible array to simplify memory allocation cpupower: rapl monitor - shows the used power consumption in uj for each rapl domain cpupower: Introduce powercap intel-rapl library and powercap-info command cpupower: Add Georgian translation cpufreq: intel_pstate: Add Sapphire Rapids support in no-HWP mode cpufreq: amd_freq_sensitivity: Add missing pci_dev_put() ...
Diffstat (limited to 'drivers/base/power')
-rw-r--r--drivers/base/power/domain.c150
-rw-r--r--drivers/base/power/runtime.c145
2 files changed, 135 insertions, 160 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index a3df9b949aeb..967bcf9d415e 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -964,8 +964,8 @@ static int genpd_runtime_suspend(struct device *dev)
return 0;
genpd_lock(genpd);
- gpd_data->rpm_pstate = genpd_drop_performance_state(dev);
genpd_power_off(genpd, true, 0);
+ gpd_data->rpm_pstate = genpd_drop_performance_state(dev);
genpd_unlock(genpd);
return 0;
@@ -1003,9 +1003,8 @@ static int genpd_runtime_resume(struct device *dev)
goto out;
genpd_lock(genpd);
+ genpd_restore_performance_state(dev, gpd_data->rpm_pstate);
ret = genpd_power_on(genpd, 0);
- if (!ret)
- genpd_restore_performance_state(dev, gpd_data->rpm_pstate);
genpd_unlock(genpd);
if (ret)
@@ -1043,8 +1042,8 @@ err_stop:
err_poweroff:
if (!pm_runtime_is_irq_safe(dev) || genpd_is_irq_safe(genpd)) {
genpd_lock(genpd);
- gpd_data->rpm_pstate = genpd_drop_performance_state(dev);
genpd_power_off(genpd, true, 0);
+ gpd_data->rpm_pstate = genpd_drop_performance_state(dev);
genpd_unlock(genpd);
}
@@ -1214,12 +1213,15 @@ static int genpd_prepare(struct device *dev)
* genpd_finish_suspend - Completion of suspend or hibernation of device in an
* I/O pm domain.
* @dev: Device to suspend.
- * @poweroff: Specifies if this is a poweroff_noirq or suspend_noirq callback.
+ * @suspend_noirq: Generic suspend_noirq callback.
+ * @resume_noirq: Generic resume_noirq callback.
*
* Stop the device and remove power from the domain if all devices in it have
* been stopped.
*/
-static int genpd_finish_suspend(struct device *dev, bool poweroff)
+static int genpd_finish_suspend(struct device *dev,
+ int (*suspend_noirq)(struct device *dev),
+ int (*resume_noirq)(struct device *dev))
{
struct generic_pm_domain *genpd;
int ret = 0;
@@ -1228,10 +1230,7 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff)
if (IS_ERR(genpd))
return -EINVAL;
- if (poweroff)
- ret = pm_generic_poweroff_noirq(dev);
- else
- ret = pm_generic_suspend_noirq(dev);
+ ret = suspend_noirq(dev);
if (ret)
return ret;
@@ -1242,10 +1241,7 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff)
!pm_runtime_status_suspended(dev)) {
ret = genpd_stop_dev(genpd, dev);
if (ret) {
- if (poweroff)
- pm_generic_restore_noirq(dev);
- else
- pm_generic_resume_noirq(dev);
+ resume_noirq(dev);
return ret;
}
}
@@ -1269,16 +1265,20 @@ static int genpd_suspend_noirq(struct device *dev)
{
dev_dbg(dev, "%s()\n", __func__);
- return genpd_finish_suspend(dev, false);
+ return genpd_finish_suspend(dev,
+ pm_generic_suspend_noirq,
+ pm_generic_resume_noirq);
}
/**
- * genpd_resume_noirq - Start of resume of device in an I/O PM domain.
+ * genpd_finish_resume - Completion of resume of device in an I/O PM domain.
* @dev: Device to resume.
+ * @resume_noirq: Generic resume_noirq callback.
*
* Restore power to the device's PM domain, if necessary, and start the device.
*/
-static int genpd_resume_noirq(struct device *dev)
+static int genpd_finish_resume(struct device *dev,
+ int (*resume_noirq)(struct device *dev))
{
struct generic_pm_domain *genpd;
int ret;
@@ -1290,7 +1290,7 @@ static int genpd_resume_noirq(struct device *dev)
return -EINVAL;
if (device_wakeup_path(dev) && genpd_is_active_wakeup(genpd))
- return pm_generic_resume_noirq(dev);
+ return resume_noirq(dev);
genpd_lock(genpd);
genpd_sync_power_on(genpd, true, 0);
@@ -1308,6 +1308,19 @@ static int genpd_resume_noirq(struct device *dev)
}
/**
+ * genpd_resume_noirq - Start of resume of device in an I/O PM domain.
+ * @dev: Device to resume.
+ *
+ * Restore power to the device's PM domain, if necessary, and start the device.
+ */
+static int genpd_resume_noirq(struct device *dev)
+{
+ dev_dbg(dev, "%s()\n", __func__);
+
+ return genpd_finish_resume(dev, pm_generic_resume_noirq);
+}
+
+/**
* genpd_freeze_noirq - Completion of freezing a device in an I/O PM domain.
* @dev: Device to freeze.
*
@@ -1318,24 +1331,11 @@ static int genpd_resume_noirq(struct device *dev)
*/
static int genpd_freeze_noirq(struct device *dev)
{
- const struct generic_pm_domain *genpd;
- int ret = 0;
-
dev_dbg(dev, "%s()\n", __func__);
- genpd = dev_to_genpd(dev);
- if (IS_ERR(genpd))
- return -EINVAL;
-
- ret = pm_generic_freeze_noirq(dev);
- if (ret)
- return ret;
-
- if (genpd->dev_ops.stop && genpd->dev_ops.start &&
- !pm_runtime_status_suspended(dev))
- ret = genpd_stop_dev(genpd, dev);
-
- return ret;
+ return genpd_finish_suspend(dev,
+ pm_generic_freeze_noirq,
+ pm_generic_thaw_noirq);
}
/**
@@ -1347,23 +1347,9 @@ static int genpd_freeze_noirq(struct device *dev)
*/
static int genpd_thaw_noirq(struct device *dev)
{
- const struct generic_pm_domain *genpd;
- int ret = 0;
-
dev_dbg(dev, "%s()\n", __func__);
- genpd = dev_to_genpd(dev);
- if (IS_ERR(genpd))
- return -EINVAL;
-
- if (genpd->dev_ops.stop && genpd->dev_ops.start &&
- !pm_runtime_status_suspended(dev)) {
- ret = genpd_start_dev(genpd, dev);
- if (ret)
- return ret;
- }
-
- return pm_generic_thaw_noirq(dev);
+ return genpd_finish_resume(dev, pm_generic_thaw_noirq);
}
/**
@@ -1378,7 +1364,9 @@ static int genpd_poweroff_noirq(struct device *dev)
{
dev_dbg(dev, "%s()\n", __func__);
- return genpd_finish_suspend(dev, true);
+ return genpd_finish_suspend(dev,
+ pm_generic_poweroff_noirq,
+ pm_generic_restore_noirq);
}
/**
@@ -1390,40 +1378,9 @@ static int genpd_poweroff_noirq(struct device *dev)
*/
static int genpd_restore_noirq(struct device *dev)
{
- struct generic_pm_domain *genpd;
- int ret = 0;
-
dev_dbg(dev, "%s()\n", __func__);
- genpd = dev_to_genpd(dev);
- if (IS_ERR(genpd))
- return -EINVAL;
-
- /*
- * At this point suspended_count == 0 means we are being run for the
- * first time for the given domain in the present cycle.
- */
- genpd_lock(genpd);
- if (genpd->suspended_count++ == 0) {
- /*
- * The boot kernel might put the domain into arbitrary state,
- * so make it appear as powered off to genpd_sync_power_on(),
- * so that it tries to power it on in case it was really off.
- */
- genpd->status = GENPD_STATE_OFF;
- }
-
- genpd_sync_power_on(genpd, true, 0);
- genpd_unlock(genpd);
-
- if (genpd->dev_ops.stop && genpd->dev_ops.start &&
- !pm_runtime_status_suspended(dev)) {
- ret = genpd_start_dev(genpd, dev);
- if (ret)
- return ret;
- }
-
- return pm_generic_restore_noirq(dev);
+ return genpd_finish_resume(dev, pm_generic_restore_noirq);
}
/**
@@ -2775,17 +2732,6 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev,
dev->pm_domain->detach = genpd_dev_pm_detach;
dev->pm_domain->sync = genpd_dev_pm_sync;
- if (power_on) {
- genpd_lock(pd);
- ret = genpd_power_on(pd, 0);
- genpd_unlock(pd);
- }
-
- if (ret) {
- genpd_remove_device(pd, dev);
- return -EPROBE_DEFER;
- }
-
/* Set the default performance state */
pstate = of_get_required_opp_performance_state(dev->of_node, index);
if (pstate < 0 && pstate != -ENODEV && pstate != -EOPNOTSUPP) {
@@ -2797,6 +2743,24 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev,
goto err;
dev_gpd_data(dev)->default_pstate = pstate;
}
+
+ if (power_on) {
+ genpd_lock(pd);
+ ret = genpd_power_on(pd, 0);
+ genpd_unlock(pd);
+ }
+
+ if (ret) {
+ /* Drop the default performance state */
+ if (dev_gpd_data(dev)->default_pstate) {
+ dev_pm_genpd_set_performance_state(dev, 0);
+ dev_gpd_data(dev)->default_pstate = 0;
+ }
+
+ genpd_remove_device(pd, dev);
+ return -EPROBE_DEFER;
+ }
+
return 1;
err:
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index b52049098d4e..50e726b6c2cf 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -243,8 +243,7 @@ void pm_runtime_set_memalloc_noio(struct device *dev, bool enable)
* flag was set by any one of the descendants.
*/
if (!dev || (!enable &&
- device_for_each_child(dev, NULL,
- dev_memalloc_noio)))
+ device_for_each_child(dev, NULL, dev_memalloc_noio)))
break;
}
mutex_unlock(&dev_hotplug_mutex);
@@ -265,15 +264,13 @@ static int rpm_check_suspend_allowed(struct device *dev)
retval = -EACCES;
else if (atomic_read(&dev->power.usage_count))
retval = -EAGAIN;
- else if (!dev->power.ignore_children &&
- atomic_read(&dev->power.child_count))
+ else if (!dev->power.ignore_children && atomic_read(&dev->power.child_count))
retval = -EBUSY;
/* Pending resume requests take precedence over suspends. */
- else if ((dev->power.deferred_resume
- && dev->power.runtime_status == RPM_SUSPENDING)
- || (dev->power.request_pending
- && dev->power.request == RPM_REQ_RESUME))
+ else if ((dev->power.deferred_resume &&
+ dev->power.runtime_status == RPM_SUSPENDING) ||
+ (dev->power.request_pending && dev->power.request == RPM_REQ_RESUME))
retval = -EAGAIN;
else if (__dev_pm_qos_resume_latency(dev) == 0)
retval = -EPERM;
@@ -404,9 +401,9 @@ static int __rpm_callback(int (*cb)(struct device *), struct device *dev)
*
* Do that if resume fails too.
*/
- if (use_links
- && ((dev->power.runtime_status == RPM_SUSPENDING && !retval)
- || (dev->power.runtime_status == RPM_RESUMING && retval))) {
+ if (use_links &&
+ ((dev->power.runtime_status == RPM_SUSPENDING && !retval) ||
+ (dev->power.runtime_status == RPM_RESUMING && retval))) {
idx = device_links_read_lock();
__rpm_put_suppliers(dev, false);
@@ -422,6 +419,38 @@ fail:
}
/**
+ * rpm_callback - Run a given runtime PM callback for a given device.
+ * @cb: Runtime PM callback to run.
+ * @dev: Device to run the callback for.
+ */
+static int rpm_callback(int (*cb)(struct device *), struct device *dev)
+{
+ int retval;
+
+ if (dev->power.memalloc_noio) {
+ unsigned int noio_flag;
+
+ /*
+ * Deadlock might be caused if memory allocation with
+ * GFP_KERNEL happens inside runtime_suspend and
+ * runtime_resume callbacks of one block device's
+ * ancestor or the block device itself. Network
+ * device might be thought as part of iSCSI block
+ * device, so network device and its ancestor should
+ * be marked as memalloc_noio too.
+ */
+ noio_flag = memalloc_noio_save();
+ retval = __rpm_callback(cb, dev);
+ memalloc_noio_restore(noio_flag);
+ } else {
+ retval = __rpm_callback(cb, dev);
+ }
+
+ dev->power.runtime_error = retval;
+ return retval != -EACCES ? retval : -EIO;
+}
+
+/**
* rpm_idle - Notify device bus type if the device can be suspended.
* @dev: Device to notify the bus type about.
* @rpmflags: Flag bits.
@@ -459,6 +488,7 @@ static int rpm_idle(struct device *dev, int rpmflags)
/* Act as though RPM_NOWAIT is always set. */
else if (dev->power.idle_notification)
retval = -EINPROGRESS;
+
if (retval)
goto out;
@@ -484,7 +514,17 @@ static int rpm_idle(struct device *dev, int rpmflags)
dev->power.idle_notification = true;
- retval = __rpm_callback(callback, dev);
+ if (dev->power.irq_safe)
+ spin_unlock(&dev->power.lock);
+ else
+ spin_unlock_irq(&dev->power.lock);
+
+ retval = callback(dev);
+
+ if (dev->power.irq_safe)
+ spin_lock(&dev->power.lock);
+ else
+ spin_lock_irq(&dev->power.lock);
dev->power.idle_notification = false;
wake_up_all(&dev->power.wait_queue);
@@ -495,38 +535,6 @@ static int rpm_idle(struct device *dev, int rpmflags)
}
/**
- * rpm_callback - Run a given runtime PM callback for a given device.
- * @cb: Runtime PM callback to run.
- * @dev: Device to run the callback for.
- */
-static int rpm_callback(int (*cb)(struct device *), struct device *dev)
-{
- int retval;
-
- if (dev->power.memalloc_noio) {
- unsigned int noio_flag;
-
- /*
- * Deadlock might be caused if memory allocation with
- * GFP_KERNEL happens inside runtime_suspend and
- * runtime_resume callbacks of one block device's
- * ancestor or the block device itself. Network
- * device might be thought as part of iSCSI block
- * device, so network device and its ancestor should
- * be marked as memalloc_noio too.
- */
- noio_flag = memalloc_noio_save();
- retval = __rpm_callback(cb, dev);
- memalloc_noio_restore(noio_flag);
- } else {
- retval = __rpm_callback(cb, dev);
- }
-
- dev->power.runtime_error = retval;
- return retval != -EACCES ? retval : -EIO;
-}
-
-/**
* rpm_suspend - Carry out runtime suspend of given device.
* @dev: Device to suspend.
* @rpmflags: Flag bits.
@@ -564,12 +572,12 @@ static int rpm_suspend(struct device *dev, int rpmflags)
/* Synchronous suspends are not allowed in the RPM_RESUMING state. */
if (dev->power.runtime_status == RPM_RESUMING && !(rpmflags & RPM_ASYNC))
retval = -EAGAIN;
+
if (retval)
goto out;
/* If the autosuspend_delay time hasn't expired yet, reschedule. */
- if ((rpmflags & RPM_AUTO)
- && dev->power.runtime_status != RPM_SUSPENDING) {
+ if ((rpmflags & RPM_AUTO) && dev->power.runtime_status != RPM_SUSPENDING) {
u64 expires = pm_runtime_autosuspend_expiration(dev);
if (expires != 0) {
@@ -584,7 +592,7 @@ static int rpm_suspend(struct device *dev, int rpmflags)
* rest.
*/
if (!(dev->power.timer_expires &&
- dev->power.timer_expires <= expires)) {
+ dev->power.timer_expires <= expires)) {
/*
* We add a slack of 25% to gather wakeups
* without sacrificing the granularity.
@@ -594,9 +602,9 @@ static int rpm_suspend(struct device *dev, int rpmflags)
dev->power.timer_expires = expires;
hrtimer_start_range_ns(&dev->power.suspend_timer,
- ns_to_ktime(expires),
- slack,
- HRTIMER_MODE_ABS);
+ ns_to_ktime(expires),
+ slack,
+ HRTIMER_MODE_ABS);
}
dev->power.timer_autosuspends = 1;
goto out;
@@ -787,8 +795,8 @@ static int rpm_resume(struct device *dev, int rpmflags)
goto out;
}
- if (dev->power.runtime_status == RPM_RESUMING
- || dev->power.runtime_status == RPM_SUSPENDING) {
+ if (dev->power.runtime_status == RPM_RESUMING ||
+ dev->power.runtime_status == RPM_SUSPENDING) {
DEFINE_WAIT(wait);
if (rpmflags & (RPM_ASYNC | RPM_NOWAIT)) {
@@ -815,8 +823,8 @@ static int rpm_resume(struct device *dev, int rpmflags)
for (;;) {
prepare_to_wait(&dev->power.wait_queue, &wait,
TASK_UNINTERRUPTIBLE);
- if (dev->power.runtime_status != RPM_RESUMING
- && dev->power.runtime_status != RPM_SUSPENDING)
+ if (dev->power.runtime_status != RPM_RESUMING &&
+ dev->power.runtime_status != RPM_SUSPENDING)
break;
spin_unlock_irq(&dev->power.lock);
@@ -836,9 +844,9 @@ static int rpm_resume(struct device *dev, int rpmflags)
*/
if (dev->power.no_callbacks && !parent && dev->parent) {
spin_lock_nested(&dev->parent->power.lock, SINGLE_DEPTH_NESTING);
- if (dev->parent->power.disable_depth > 0
- || dev->parent->power.ignore_children
- || dev->parent->power.runtime_status == RPM_ACTIVE) {
+ if (dev->parent->power.disable_depth > 0 ||
+ dev->parent->power.ignore_children ||
+ dev->parent->power.runtime_status == RPM_ACTIVE) {
atomic_inc(&dev->parent->power.child_count);
spin_unlock(&dev->parent->power.lock);
retval = 1;
@@ -867,6 +875,7 @@ static int rpm_resume(struct device *dev, int rpmflags)
parent = dev->parent;
if (dev->power.irq_safe)
goto skip_parent;
+
spin_unlock(&dev->power.lock);
pm_runtime_get_noresume(parent);
@@ -876,8 +885,8 @@ static int rpm_resume(struct device *dev, int rpmflags)
* Resume the parent if it has runtime PM enabled and not been
* set to ignore its children.
*/
- if (!parent->power.disable_depth
- && !parent->power.ignore_children) {
+ if (!parent->power.disable_depth &&
+ !parent->power.ignore_children) {
rpm_resume(parent, 0);
if (parent->power.runtime_status != RPM_ACTIVE)
retval = -EBUSY;
@@ -887,6 +896,7 @@ static int rpm_resume(struct device *dev, int rpmflags)
spin_lock(&dev->power.lock);
if (retval)
goto out;
+
goto repeat;
}
skip_parent:
@@ -1291,9 +1301,9 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
* not active, has runtime PM enabled and the
* 'power.ignore_children' flag unset.
*/
- if (!parent->power.disable_depth
- && !parent->power.ignore_children
- && parent->power.runtime_status != RPM_ACTIVE) {
+ if (!parent->power.disable_depth &&
+ !parent->power.ignore_children &&
+ parent->power.runtime_status != RPM_ACTIVE) {
dev_err(dev, "runtime PM trying to activate child device %s but parent (%s) is not active\n",
dev_name(dev),
dev_name(parent));
@@ -1358,9 +1368,9 @@ static void __pm_runtime_barrier(struct device *dev)
dev->power.request_pending = false;
}
- if (dev->power.runtime_status == RPM_SUSPENDING
- || dev->power.runtime_status == RPM_RESUMING
- || dev->power.idle_notification) {
+ if (dev->power.runtime_status == RPM_SUSPENDING ||
+ dev->power.runtime_status == RPM_RESUMING ||
+ dev->power.idle_notification) {
DEFINE_WAIT(wait);
/* Suspend, wake-up or idle notification in progress. */
@@ -1445,8 +1455,8 @@ void __pm_runtime_disable(struct device *dev, bool check_resume)
* means there probably is some I/O to process and disabling runtime PM
* shouldn't prevent the device from processing the I/O.
*/
- if (check_resume && dev->power.request_pending
- && dev->power.request == RPM_REQ_RESUME) {
+ if (check_resume && dev->power.request_pending &&
+ dev->power.request == RPM_REQ_RESUME) {
/*
* Prevent suspends and idle notifications from being carried
* out after we have woken up the device.
@@ -1606,6 +1616,7 @@ void pm_runtime_irq_safe(struct device *dev)
{
if (dev->parent)
pm_runtime_get_sync(dev->parent);
+
spin_lock_irq(&dev->power.lock);
dev->power.irq_safe = 1;
spin_unlock_irq(&dev->power.lock);