diff options
| -rw-r--r-- | drivers/base/power/main.c | 3 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 46 | ||||
| -rw-r--r-- | drivers/cpuidle/cpuidle.c | 2 | ||||
| -rw-r--r-- | drivers/idle/intel_idle.c | 4 | ||||
| -rw-r--r-- | drivers/pnp/driver.c | 12 | ||||
| -rw-r--r-- | drivers/powercap/powercap_sys.c | 7 | ||||
| -rw-r--r-- | fs/eventpoll.c | 3 | ||||
| -rw-r--r-- | include/linux/cpufreq.h | 8 | ||||
| -rw-r--r-- | include/uapi/linux/eventpoll.h | 13 |
9 files changed, 87 insertions, 11 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 1b41fca3d65a..e3219dfd736c 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -29,6 +29,7 @@ #include <linux/async.h> #include <linux/suspend.h> #include <trace/events/power.h> +#include <linux/cpufreq.h> #include <linux/cpuidle.h> #include <linux/timer.h> @@ -540,6 +541,7 @@ static void dpm_resume_noirq(pm_message_t state) dpm_show_time(starttime, state, "noirq"); resume_device_irqs(); cpuidle_resume(); + cpufreq_resume(); } /** @@ -955,6 +957,7 @@ static int dpm_suspend_noirq(pm_message_t state) ktime_t starttime = ktime_get(); int error = 0; + cpufreq_suspend(); cpuidle_pause(); suspend_device_irqs(); mutex_lock(&dpm_list_mtx); diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 02d534da22dd..81e9d4412db8 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -26,6 +26,7 @@ #include <linux/module.h> #include <linux/mutex.h> #include <linux/slab.h> +#include <linux/suspend.h> #include <linux/syscore_ops.h> #include <linux/tick.h> #include <trace/events/power.h> @@ -47,6 +48,9 @@ static LIST_HEAD(cpufreq_policy_list); static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor); #endif +/* Flag to suspend/resume CPUFreq governors */ +static bool cpufreq_suspended; + static inline bool has_target(void) { return cpufreq_driver->target_index || cpufreq_driver->target; @@ -1462,6 +1466,41 @@ static struct subsys_interface cpufreq_interface = { .remove_dev = cpufreq_remove_dev, }; +void cpufreq_suspend(void) +{ + struct cpufreq_policy *policy; + + if (!has_target()) + return; + + pr_debug("%s: Suspending Governors\n", __func__); + + list_for_each_entry(policy, &cpufreq_policy_list, policy_list) + if (__cpufreq_governor(policy, CPUFREQ_GOV_STOP)) + pr_err("%s: Failed to stop governor for policy: %p\n", + __func__, policy); + + cpufreq_suspended = true; +} + +void cpufreq_resume(void) +{ + struct cpufreq_policy *policy; + + if (!has_target()) + return; + + pr_debug("%s: Resuming Governors\n", __func__); + + cpufreq_suspended = false; + + list_for_each_entry(policy, &cpufreq_policy_list, policy_list) + if (__cpufreq_governor(policy, CPUFREQ_GOV_START) + || __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS)) + pr_err("%s: Failed to start governor for policy: %p\n", + __func__, policy); +} + /** * cpufreq_bp_suspend - Prepare the boot CPU for system suspend. * @@ -1764,6 +1803,10 @@ static int __cpufreq_governor(struct cpufreq_policy *policy, struct cpufreq_governor *gov = NULL; #endif + /* Don't start any governor operations if we are entering suspend */ + if (cpufreq_suspended) + return 0; + if (policy->governor->max_transition_latency && policy->cpuinfo.transition_latency > policy->governor->max_transition_latency) { @@ -2076,9 +2119,6 @@ static int cpufreq_cpu_callback(struct notifier_block *nfb, dev = get_cpu_device(cpu); if (dev) { - if (action & CPU_TASKS_FROZEN) - frozen = true; - switch (action & ~CPU_TASKS_FROZEN) { case CPU_ONLINE: __cpufreq_add_dev(dev, NULL, frozen); diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index 2a991e468f78..a55e68f2cfc8 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -400,7 +400,7 @@ EXPORT_SYMBOL_GPL(cpuidle_register_device); */ void cpuidle_unregister_device(struct cpuidle_device *dev) { - if (dev->registered == 0) + if (!dev || dev->registered == 0) return; cpuidle_pause_and_lock(); diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index cbd4e9abc47e..92d1206482a6 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -329,7 +329,7 @@ static struct cpuidle_state atom_cstates[] __initdata = { { .enter = NULL } }; -static struct cpuidle_state avn_cstates[CPUIDLE_STATE_MAX] = { +static struct cpuidle_state avn_cstates[] __initdata = { { .name = "C1-AVN", .desc = "MWAIT 0x00", @@ -340,7 +340,7 @@ static struct cpuidle_state avn_cstates[CPUIDLE_STATE_MAX] = { { .name = "C6-AVN", .desc = "MWAIT 0x51", - .flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, + .flags = MWAIT2flg(0x51) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, .exit_latency = 15, .target_residency = 45, .enter = &intel_idle }, diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c index 6936e0acedcd..f748cc8cbb03 100644 --- a/drivers/pnp/driver.c +++ b/drivers/pnp/driver.c @@ -197,6 +197,11 @@ static int pnp_bus_freeze(struct device *dev) return __pnp_bus_suspend(dev, PMSG_FREEZE); } +static int pnp_bus_poweroff(struct device *dev) +{ + return __pnp_bus_suspend(dev, PMSG_HIBERNATE); +} + static int pnp_bus_resume(struct device *dev) { struct pnp_dev *pnp_dev = to_pnp_dev(dev); @@ -234,9 +239,14 @@ static int pnp_bus_resume(struct device *dev) } static const struct dev_pm_ops pnp_bus_dev_pm_ops = { + /* Suspend callbacks */ .suspend = pnp_bus_suspend, - .freeze = pnp_bus_freeze, .resume = pnp_bus_resume, + /* Hibernate callbacks */ + .freeze = pnp_bus_freeze, + .thaw = pnp_bus_resume, + .poweroff = pnp_bus_poweroff, + .restore = pnp_bus_resume, }; struct bus_type pnp_bus_type = { diff --git a/drivers/powercap/powercap_sys.c b/drivers/powercap/powercap_sys.c index 8d0fe431dbdd..84419af16f77 100644 --- a/drivers/powercap/powercap_sys.c +++ b/drivers/powercap/powercap_sys.c @@ -377,9 +377,14 @@ static void create_power_zone_common_attributes( if (power_zone->ops->get_max_energy_range_uj) power_zone->zone_dev_attrs[count++] = &dev_attr_max_energy_range_uj.attr; - if (power_zone->ops->get_energy_uj) + if (power_zone->ops->get_energy_uj) { + if (power_zone->ops->reset_energy_uj) + dev_attr_energy_uj.attr.mode = S_IWUSR | S_IRUGO; + else + dev_attr_energy_uj.attr.mode = S_IRUGO; power_zone->zone_dev_attrs[count++] = &dev_attr_energy_uj.attr; + } if (power_zone->ops->get_power_uw) power_zone->zone_dev_attrs[count++] = &dev_attr_power_uw.attr; diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 79b65c3b9e87..8b5e2584c840 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1852,8 +1852,7 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, goto error_tgt_fput; /* Check if EPOLLWAKEUP is allowed */ - if ((epds.events & EPOLLWAKEUP) && !capable(CAP_BLOCK_SUSPEND)) - epds.events &= ~EPOLLWAKEUP; + ep_take_care_of_epollwakeup(&epds); /* * We have to check that the file structure underneath the file descriptor diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index dc196bbcf227..ee5fe9d77ae8 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -280,6 +280,14 @@ cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) policy->cpuinfo.max_freq); } +#ifdef CONFIG_CPU_FREQ +void cpufreq_suspend(void); +void cpufreq_resume(void); +#else +static inline void cpufreq_suspend(void) {} +static inline void cpufreq_resume(void) {} +#endif + /********************************************************************* * CPUFREQ NOTIFIER INTERFACE * *********************************************************************/ diff --git a/include/uapi/linux/eventpoll.h b/include/uapi/linux/eventpoll.h index 2c267bcbb85c..bc81fb2e1f0e 100644 --- a/include/uapi/linux/eventpoll.h +++ b/include/uapi/linux/eventpoll.h @@ -61,5 +61,16 @@ struct epoll_event { __u64 data; } EPOLL_PACKED; - +#ifdef CONFIG_PM_SLEEP +static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev) +{ + if ((epev->events & EPOLLWAKEUP) && !capable(CAP_BLOCK_SUSPEND)) + epev->events &= ~EPOLLWAKEUP; +} +#else +static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev) +{ + epev->events &= ~EPOLLWAKEUP; +} +#endif #endif /* _UAPI_LINUX_EVENTPOLL_H */ |
