diff options
Diffstat (limited to 'drivers/base/power/main.c')
| -rw-r--r-- | drivers/base/power/main.c | 105 |
1 files changed, 53 insertions, 52 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index a690fd400260..43e863cc0c1b 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -17,6 +17,8 @@ * subsystem list maintains. */ +#define pr_fmt(fmt) "PM: " fmt + #include <linux/device.h> #include <linux/export.h> #include <linux/mutex.h> @@ -32,6 +34,7 @@ #include <trace/events/power.h> #include <linux/cpufreq.h> #include <linux/cpuidle.h> +#include <linux/devfreq.h> #include <linux/timer.h> #include "../base.h" @@ -123,7 +126,11 @@ void device_pm_unlock(void) */ void device_pm_add(struct device *dev) { - pr_debug("PM: Adding info for %s:%s\n", + /* Skip PM setup/initialization. */ + if (device_pm_not_required(dev)) + return; + + pr_debug("Adding info for %s:%s\n", dev->bus ? dev->bus->name : "No Bus", dev_name(dev)); device_pm_check_callbacks(dev); mutex_lock(&dpm_list_mtx); @@ -141,7 +148,10 @@ void device_pm_add(struct device *dev) */ void device_pm_remove(struct device *dev) { - pr_debug("PM: Removing info for %s:%s\n", + if (device_pm_not_required(dev)) + return; + + pr_debug("Removing info for %s:%s\n", dev->bus ? dev->bus->name : "No Bus", dev_name(dev)); complete_all(&dev->power.completion); mutex_lock(&dpm_list_mtx); @@ -160,7 +170,7 @@ void device_pm_remove(struct device *dev) */ void device_pm_move_before(struct device *deva, struct device *devb) { - pr_debug("PM: Moving %s:%s before %s:%s\n", + pr_debug("Moving %s:%s before %s:%s\n", deva->bus ? deva->bus->name : "No Bus", dev_name(deva), devb->bus ? devb->bus->name : "No Bus", dev_name(devb)); /* Delete deva from dpm_list and reinsert before devb. */ @@ -174,7 +184,7 @@ void device_pm_move_before(struct device *deva, struct device *devb) */ void device_pm_move_after(struct device *deva, struct device *devb) { - pr_debug("PM: Moving %s:%s after %s:%s\n", + pr_debug("Moving %s:%s after %s:%s\n", deva->bus ? deva->bus->name : "No Bus", dev_name(deva), devb->bus ? devb->bus->name : "No Bus", dev_name(devb)); /* Delete deva from dpm_list and reinsert after devb. */ @@ -187,7 +197,7 @@ void device_pm_move_after(struct device *deva, struct device *devb) */ void device_pm_move_last(struct device *dev) { - pr_debug("PM: Moving %s:%s to end of list\n", + pr_debug("Moving %s:%s to end of list\n", dev->bus ? dev->bus->name : "No Bus", dev_name(dev)); list_move_tail(&dev->power.entry, &dpm_list); } @@ -410,8 +420,8 @@ static void pm_dev_dbg(struct device *dev, pm_message_t state, const char *info) static void pm_dev_err(struct device *dev, pm_message_t state, const char *info, int error) { - printk(KERN_ERR "PM: Device %s failed to %s%s: error %d\n", - dev_name(dev), pm_verb(state.event), info, error); + pr_err("Device %s failed to %s%s: error %d\n", + dev_name(dev), pm_verb(state.event), info, error); } static void dpm_show_time(ktime_t starttime, pm_message_t state, int error, @@ -468,7 +478,7 @@ struct dpm_watchdog { /** * dpm_watchdog_handler - Driver suspend / resume watchdog handler. - * @data: Watchdog object address. + * @t: The timer that PM watchdog depends on. * * Called when a driver has timed out suspending or resuming. * There's not much we can do here to recover so panic() to @@ -696,6 +706,19 @@ static bool is_async(struct device *dev) && !pm_trace_is_enabled(); } +static bool dpm_async_fn(struct device *dev, async_func_t func) +{ + reinit_completion(&dev->power.completion); + + if (is_async(dev)) { + get_device(dev); + async_schedule(func, dev); + return true; + } + + return false; +} + static void async_resume_noirq(void *data, async_cookie_t cookie) { struct device *dev = (struct device *)data; @@ -722,13 +745,8 @@ void dpm_noirq_resume_devices(pm_message_t state) * in case the starting of async threads is * delayed by non-async resuming devices. */ - list_for_each_entry(dev, &dpm_noirq_list, power.entry) { - reinit_completion(&dev->power.completion); - if (is_async(dev)) { - get_device(dev); - async_schedule(async_resume_noirq, dev); - } - } + list_for_each_entry(dev, &dpm_noirq_list, power.entry) + dpm_async_fn(dev, async_resume_noirq); while (!list_empty(&dpm_noirq_list)) { dev = to_device(dpm_noirq_list.next); @@ -879,13 +897,8 @@ void dpm_resume_early(pm_message_t state) * in case the starting of async threads is * delayed by non-async resuming devices. */ - list_for_each_entry(dev, &dpm_late_early_list, power.entry) { - reinit_completion(&dev->power.completion); - if (is_async(dev)) { - get_device(dev); - async_schedule(async_resume_early, dev); - } - } + list_for_each_entry(dev, &dpm_late_early_list, power.entry) + dpm_async_fn(dev, async_resume_early); while (!list_empty(&dpm_late_early_list)) { dev = to_device(dpm_late_early_list.next); @@ -1043,13 +1056,8 @@ void dpm_resume(pm_message_t state) pm_transition = state; async_error = 0; - list_for_each_entry(dev, &dpm_suspended_list, power.entry) { - reinit_completion(&dev->power.completion); - if (is_async(dev)) { - get_device(dev); - async_schedule(async_resume, dev); - } - } + list_for_each_entry(dev, &dpm_suspended_list, power.entry) + dpm_async_fn(dev, async_resume); while (!list_empty(&dpm_suspended_list)) { dev = to_device(dpm_suspended_list.next); @@ -1078,6 +1086,7 @@ void dpm_resume(pm_message_t state) dpm_show_time(starttime, state, 0, NULL); cpufreq_resume(); + devfreq_resume(); trace_suspend_resume(TPS("dpm_resume"), state.event, false); } @@ -1362,13 +1371,9 @@ static void async_suspend_noirq(void *data, async_cookie_t cookie) static int device_suspend_noirq(struct device *dev) { - reinit_completion(&dev->power.completion); - - if (is_async(dev)) { - get_device(dev); - async_schedule(async_suspend_noirq, dev); + if (dpm_async_fn(dev, async_suspend_noirq)) return 0; - } + return __device_suspend_noirq(dev, pm_transition, false); } @@ -1565,13 +1570,8 @@ static void async_suspend_late(void *data, async_cookie_t cookie) static int device_suspend_late(struct device *dev) { - reinit_completion(&dev->power.completion); - - if (is_async(dev)) { - get_device(dev); - async_schedule(async_suspend_late, dev); + if (dpm_async_fn(dev, async_suspend_late)) return 0; - } return __device_suspend_late(dev, pm_transition, false); } @@ -1736,11 +1736,17 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async) if (dev->power.syscore) goto Complete; + /* Avoid direct_complete to let wakeup_path propagate. */ + if (device_may_wakeup(dev) || dev->power.wakeup_path) + dev->power.direct_complete = false; + if (dev->power.direct_complete) { if (pm_runtime_status_suspended(dev)) { pm_runtime_disable(dev); - if (pm_runtime_status_suspended(dev)) + if (pm_runtime_status_suspended(dev)) { + pm_dev_dbg(dev, state, "direct-complete "); goto Complete; + } pm_runtime_enable(dev); } @@ -1829,13 +1835,8 @@ static void async_suspend(void *data, async_cookie_t cookie) static int device_suspend(struct device *dev) { - reinit_completion(&dev->power.completion); - - if (is_async(dev)) { - get_device(dev); - async_schedule(async_suspend, dev); + if (dpm_async_fn(dev, async_suspend)) return 0; - } return __device_suspend(dev, pm_transition, false); } @@ -1852,6 +1853,7 @@ int dpm_suspend(pm_message_t state) trace_suspend_resume(TPS("dpm_suspend"), state.event, true); might_sleep(); + devfreq_suspend(); cpufreq_suspend(); mutex_lock(&dpm_list_mtx); @@ -2010,8 +2012,7 @@ int dpm_prepare(pm_message_t state) error = 0; continue; } - printk(KERN_INFO "PM: Device %s not prepared " - "for power transition: code %d\n", + pr_info("Device %s not prepared for power transition: code %d\n", dev_name(dev), error); put_device(dev); break; @@ -2050,14 +2051,14 @@ EXPORT_SYMBOL_GPL(dpm_suspend_start); void __suspend_report_result(const char *function, void *fn, int ret) { if (ret) - printk(KERN_ERR "%s(): %pF returns %d\n", function, fn, ret); + pr_err("%s(): %pF returns %d\n", function, fn, ret); } EXPORT_SYMBOL_GPL(__suspend_report_result); /** * device_pm_wait_for_dev - Wait for suspend/resume of a device to complete. - * @dev: Device to wait for. * @subordinate: Device that needs to wait for @dev. + * @dev: Device to wait for. */ int device_pm_wait_for_dev(struct device *subordinate, struct device *dev) { |