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authorLinus Torvalds <torvalds@linux-foundation.org>2017-10-05 15:51:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-10-05 15:51:37 -0700
commit7a92616c0bac849e790283723b36c399668a1d9f (patch)
treead11fcabb29541b210c4a5176f4fd4776b4cbf5d /kernel
parent076264ada9a307300be7a4581165f9c9deed5d1b (diff)
parentca935f8e769c3e36e1b6339cc527a25c49f4d624 (diff)
downloadlinux-7a92616c0bac849e790283723b36c399668a1d9f.tar.bz2
Merge tag 'pm-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fix from Rafael Wysocki: "This fixes a code ordering issue in the main suspend-to-idle loop that causes some "low power S0 idle" conditions to be incorrectly reported as unmet with suspend/resume debug messages enabled" * tag 'pm-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PM / s2idle: Invoke the ->wake() platform callback earlier
Diffstat (limited to 'kernel')
-rw-r--r--kernel/power/suspend.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 3e2b4f519009..ccd2d20e6b06 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -120,22 +120,26 @@ static void s2idle_loop(void)
* frozen processes + suspended devices + idle processors.
* Thus s2idle_enter() should be called right after
* all devices have been suspended.
+ *
+ * Wakeups during the noirq suspend of devices may be spurious,
+ * so prevent them from terminating the loop right away.
*/
error = dpm_noirq_suspend_devices(PMSG_SUSPEND);
if (!error)
s2idle_enter();
+ else if (error == -EBUSY && pm_wakeup_pending())
+ error = 0;
- dpm_noirq_resume_devices(PMSG_RESUME);
- if (error && (error != -EBUSY || !pm_wakeup_pending())) {
- dpm_noirq_end();
- break;
- }
-
- if (s2idle_ops && s2idle_ops->wake)
+ if (!error && s2idle_ops && s2idle_ops->wake)
s2idle_ops->wake();
+ dpm_noirq_resume_devices(PMSG_RESUME);
+
dpm_noirq_end();
+ if (error)
+ break;
+
if (s2idle_ops && s2idle_ops->sync)
s2idle_ops->sync();