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| author |   Strashko, Grygorii <grygorii.strashko@ti.com> | 2015-11-10 11:42:34 +0200 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-11-30 14:47:22 +0100 |
| commit | 013c074f8642d8e815ad670601f8e27155a74b57 (patch) | |
| tree | 66eb244459aa071de90db3cb258370e7aeb1e910 /drivers/base/base.h | |
| parent | Linux 4.4-rc3 (diff) | |
| download | linux-dev-013c074f8642d8e815ad670601f8e27155a74b57.tar.xz linux-dev-013c074f8642d8e815ad670601f8e27155a74b57.zip | |
PM / sleep: prohibit devices probing during suspend/hibernation
It is unsafe [1] if probing of devices will happen during suspend or
hibernation and system behavior will be unpredictable in this case.
So, let's prohibit device's probing in dpm_prepare() and defer their
probing instead. The normal behavior will be restored in
dpm_complete().
This patch introduces new DD core APIs:
device_block_probing()
It will disable probing of devices and defer their probes instead.
device_unblock_probing()
It will restore normal behavior and trigger re-probing of deferred
devices.
[1] https://lkml.org/lkml/2015/9/11/554
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/base.h')
| -rw-r--r-- | drivers/base/base.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/base/base.h b/drivers/base/base.h index 1782f3aa386e..e05db388bd1c 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -131,6 +131,8 @@ extern void device_remove_groups(struct device *dev, extern char *make_class_name(const char *name, struct kobject *kobj); extern int devres_release_all(struct device *dev); +extern void device_block_probing(void); +extern void device_unblock_probing(void); /* /sys/devices directory */ extern struct kset *devices_kset; |