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Commit 9320f95c authored by xing wei's avatar xing wei Committed by Rafael J. Wysocki
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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: default avatarxing wei <xing.wei@intel.com>
[ rjw: Subject & changelog ]
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent b53f40db

drivers/base/power/wakeup.c

+3 −3
Original line number Diff line number Diff line
@@ -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);