From 9320f95c0b8f1d074f570385e6855d4554f693e4 Mon Sep 17 00:00:00 2001 From: xing wei Date: Wed, 7 Dec 2016 19:31:16 +0800 Subject: [PATCH] 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 [ rjw: Subject & changelog ] Signed-off-by: Rafael J. Wysocki --- drivers/base/power/wakeup.c | 6 +++--- 1 file 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); -- 2.20.1