diff options
Diffstat (limited to 'drivers/base/power/wakeup.c')
| -rw-r--r-- | drivers/base/power/wakeup.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c index 2c3435d55d01..305d6dd6bdef 100644 --- a/drivers/base/power/wakeup.c +++ b/drivers/base/power/wakeup.c @@ -15,6 +15,7 @@ #include <linux/seq_file.h> #include <linux/debugfs.h> #include <linux/pm_wakeirq.h> +#include <linux/types.h> #include <trace/events/power.h> #include "power.h" @@ -806,16 +807,31 @@ EXPORT_SYMBOL_GPL(pm_wakeup_event); void pm_get_active_wakeup_sources(char *pending_wakeup_source, size_t max) { - struct wakeup_source *ws; + struct wakeup_source *ws, *last_active_ws = NULL; int len = 0; + bool active = false; + rcu_read_lock(); - len += snprintf(pending_wakeup_source, max, "Pending Wakeup Sources: "); list_for_each_entry_rcu(ws, &wakeup_sources, entry) { if (ws->active) { - len += snprintf(pending_wakeup_source + len, max, + if (!active) + len += scnprintf(pending_wakeup_source, max, + "Pending Wakeup Sources: "); + len += scnprintf(pending_wakeup_source + len, max - len, "%s ", ws->name); + active = true; + } else if (!active && + (!last_active_ws || + ktime_to_ns(ws->last_time) > + ktime_to_ns(last_active_ws->last_time))) { + last_active_ws = ws; } } + if (!active && last_active_ws) { + scnprintf(pending_wakeup_source, max, + "Last active Wakeup Source: %s", + last_active_ws->name); + } rcu_read_unlock(); } EXPORT_SYMBOL_GPL(pm_get_active_wakeup_sources); |