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| author | xing wei <xing.wei@intel.com> | 2016-12-07 14:31:16 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-12-08 03:26:23 +0300 |
| commit | 9320f95c0b8f1d074f570385e6855d4554f693e4 (patch) | |
| tree | e789238fc895e172a4c19cce4ed20c664e827e7e /drivers/base/power/wakeup.c | |
| parent | b53f40db59b27b62bc294c30506b02a0cae47e0b (diff) | |
| download | linux-9320f95c0b8f1d074f570385e6855d4554f693e4.tar.xz | |
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/wakeup.c')
| -rw-r--r-- | drivers/base/power/wakeup.c | 6 |
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); |