diff options
| -rw-r--r-- | kernel/power/suspend.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 89ca6fa746b..e53c663a5e9 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -36,6 +36,10 @@ const char *const pm_states[PM_SUSPEND_MAX] = { static const struct platform_suspend_ops *suspend_ops; +static struct completion second_cpu_complete = {1, + __WAIT_QUEUE_HEAD_INITIALIZER((second_cpu_complete).wait) +}; + /** * suspend_set_ops - Set the global suspend method table. * @ops: Suspend operations to use. @@ -262,6 +266,9 @@ static int plug_secondary_cpus(void *data) suspend_test(TEST_DEVICES) || suspend_test(TEST_PLATFORM))) enable_nonboot_cpus(); + + complete(&second_cpu_complete); + return 0; } @@ -284,6 +291,14 @@ static int enter_state(suspend_state_t state) if (!mutex_trylock(&pm_mutex)) return -EBUSY; + /* + * Assure that previous started thread is completed before + * attempting to suspend again. + */ + error = wait_for_completion_timeout(&second_cpu_complete, + msecs_to_jiffies(500)); + WARN_ON(error == 0); + printk(KERN_INFO "PM: Syncing filesystems ... "); sys_sync(); printk("done.\n"); |