diff options
| author | Arto Merilainen <amerilainen@nvidia.com> | 2013-08-27 16:17:58 +0300 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2013-09-27 12:51:50 -0700 |
| commit | fd7d79741d1ad2a31ea3bfeea947a9d6af16235e (patch) | |
| tree | def920a1a9ce8c73e3e72f42341915becb3d985e /kernel | |
| parent | 63078e87a62b265111622e58e66d9e67a2e1519b (diff) | |
kernel: power: Add PM_USERSPACE_FROZEN workqueue
Some device drivers require a callback to be called after the userspace
processes are frozen. This patch adds PM_USERSPACE_FROZEN workqueue
which is called after userspace processes are frozen but when the
kernel threads are still functioning.
Bug 1344551
Change-Id: I0e6fd7e2473db168d01c88bc0192326ceea92ebe
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/266774
(cherry picked from commit d964493291ef87eea1a2ee47b5b66305bb18bcf3)
Reviewed-on: http://git-master/r/274939
Tested-by: Sang-Hun Lee <sanlee@nvidia.com>
Reviewed-by: Kevin Huang (Eng-SW) <kevinh@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/power.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/power/power.h b/kernel/power/power.h index 7d4b7ffb3c1d..49deae3b345f 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -242,6 +242,13 @@ static inline int suspend_freeze_processes(void) if (error) return error; + error = pm_notifier_call_chain(PM_USERSPACE_FROZEN); + if (error) { + printk(KERN_INFO "Userspace frozen workqueue canceled suspend\n"); + thaw_processes(); + return error; + } + error = freeze_kernel_threads(); /* * freeze_kernel_threads() thaws only kernel threads upon freezing |