git/linux-cryptodev-2.6
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git synced 2026-05-01 15:15:19 -04:00
Code Issues Packages Projects Releases Wiki Activity

PM / sleep: make PM notifiers called symmetrically

Browse Source 
This makes pm notifier PREPARE/POST symmetrical: if PREPARE
fails, we will only undo what ever happened on PREPARE.

It fixes the unbalanced CPU hotplug enable in CPU PM notifier.

Signed-off-by: Lianwei Wang <lianwei.wang@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lianwei Wang
2016-06-19 23:52:27 -07:00
committed by Rafael J. Wysocki
parent ca5f2b4c4f
commit ea00f4f4f0
5 changed files with 37 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
kernel/power/suspend.c
View File

@@ -266,16 +266,18 @@ static int suspend_test(int level)
*/
static int suspend_prepare(suspend_state_t state)
{
int error;
int error, nr_calls = 0;
if (!sleep_state_supported(state))
return -EPERM;
pm_prepare_console();
error = pm_notifier_call_chain(PM_SUSPEND_PREPARE);
if (error)
error = __pm_notifier_call_chain(PM_SUSPEND_PREPARE, -1, &nr_calls);
if (error) {
nr_calls--;
goto Finish;
}
trace_suspend_resume(TPS("freeze_processes"), 0, true);
error = suspend_freeze_processes();
@@ -286,7 +288,7 @@ static int suspend_prepare(suspend_state_t state)
suspend_stats.failed_freeze++;
dpm_save_failed_step(SUSPEND_FREEZE);
Finish:
pm_notifier_call_chain(PM_POST_SUSPEND);
__pm_notifier_call_chain(PM_POST_SUSPEND, nr_calls, NULL);
pm_restore_console();
return error;
}