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authorxing wei <xing.wei@intel.com>2016-12-07 19:31:16 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-12-08 01:26:23 +0100
commit9320f95c0b8f1d074f570385e6855d4554f693e4 (patch)
treee789238fc895e172a4c19cce4ed20c664e827e7e /drivers/base/power
parentb53f40db59b27b62bc294c30506b02a0cae47e0b (diff)
PM / sleep: Print active wakeup sources when blocking on wakeup_count reads
If there are any wakeup events being processed, read operation on /sys/power/wakeup_count will be blocked, so print the names of all active wakeup sources to help to find out who is preventing system suspend from triggering. While at it change pr_info() in pm_print_active_wakeup_sources() to pr_debug() to avoid excessive log noise. Signed-off-by: xing wei <xing.wei@intel.com> [ rjw: Subject & changelog ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/power')
-rw-r--r--drivers/base/power/wakeup.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index 62e4de2aa8d1..bf9ba26981a5 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -811,7 +811,7 @@ void pm_print_active_wakeup_sources(void)
rcu_read_lock();
list_for_each_entry_rcu(ws, &wakeup_sources, entry) {
if (ws->active) {
- pr_info("active wakeup source: %s\n", ws->name);
+ pr_debug("active wakeup source: %s\n", ws->name);
active = 1;
} else if (!active &&
(!last_activity_ws ||
@@ -822,7 +822,7 @@ void pm_print_active_wakeup_sources(void)
}
if (!active && last_activity_ws)
- pr_info("last active wakeup source: %s\n",
+ pr_debug("last active wakeup source: %s\n",
last_activity_ws->name);
rcu_read_unlock();
}
@@ -905,7 +905,7 @@ bool pm_get_wakeup_count(unsigned int *count, bool block)
split_counters(&cnt, &inpr);
if (inpr == 0 || signal_pending(current))
break;
-
+ pm_print_active_wakeup_sources();
schedule();
}
finish_wait(&wakeup_count_wait_queue, &wait);