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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-07-21 02:12:10 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-07-24 23:53:46 +0200 |
| commit | 9a3ebe3523cc8297301d5d95332536ad123856bf (patch) | |
| tree | 2c99ca6d2ba28b7ed99702f0596683f0bb6c1052 /kernel/power | |
| parent | 48059c095bafc2ba23da1b3fa26b6ba142cb854f (diff) | |
| download | linux-9a3ebe3523cc8297301d5d95332536ad123856bf.tar.bz2 | |
PM / sleep: Check pm_wakeup_pending() in __device_suspend_noirq()
Restore the pm_wakeup_pending() check in __device_suspend_noirq()
removed by commit eed4d47efe95 (ACPI / sleep: Ignore spurious SCI
wakeups from suspend-to-idle) as that allows the function to return
earlier if there's a wakeup event pending already (so that it may
spend less time on carrying out operations that will be reversed
shortly anyway) and rework the main suspend-to-idle loop to take
that optimization into account.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/suspend.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 0c61713b6e5c..5cf232795318 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -108,19 +108,32 @@ static void s2idle_loop(void) { pm_pr_dbg("suspend-to-idle\n"); - while (!dpm_suspend_noirq(PMSG_SUSPEND)) { + for (;;) { + int error; + + dpm_noirq_begin(); + /* * Suspend-to-idle equals * frozen processes + suspended devices + idle processors. * Thus freeze_enter() should be called right after * all devices have been suspended. */ - freeze_enter(); + error = dpm_noirq_suspend_devices(PMSG_SUSPEND); + if (!error) + freeze_enter(); + + dpm_noirq_resume_devices(PMSG_RESUME); + if (error && (error != -EBUSY || !pm_wakeup_pending())) { + dpm_noirq_end(); + break; + } if (freeze_ops && freeze_ops->wake) freeze_ops->wake(); - dpm_resume_noirq(PMSG_RESUME); + dpm_noirq_end(); + if (freeze_ops && freeze_ops->sync) freeze_ops->sync(); |