introduce device async resume.
If boot option "dev_async_action" is added,
devices can be resumed asynhronously.
Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
---
drivers/base/power/main.c | 4 +++-
include/linux/async_dev.h | 4 +++-
drivers/base/async_dev.c | 1 +
3 files changed, 7 insertions(+), 2 deletions(-)
Index: linux-2.6/drivers/base/power/main.c
===================================================================
--- linux-2.6.orig/drivers/base/power/main.c
+++ linux-2.6/drivers/base/power/main.c
@@ -445,7 +445,8 @@ static void dpm_resume(pm_message_t stat
dev->power.status = DPM_RESUMING;
mutex_unlock(&dpm_list_mtx);
- error = device_resume(dev, state);
+ error = dev_async_schedule(dev, device_resume, &state,
+ DEV_ASYNC_RESUME);
mutex_lock(&dpm_list_mtx);
if (error)
@@ -460,6 +461,7 @@ static void dpm_resume(pm_message_t stat
}
list_splice(&list, &dpm_list);
mutex_unlock(&dpm_list_mtx);
+ dev_async_synchronization();
}
/**
Index: linux-2.6/include/linux/async_dev.h
===================================================================
--- linux-2.6.orig/include/linux/async_dev.h
+++ linux-2.6/include/linux/async_dev.h
@@ -29,7 +29,9 @@ struct dev_async_struct {
};
#define DEV_ASYNC_SUSPEND 1
-#define DEV_ASYNC_ACTIONS_ALL DEV_ASYNC_SUSPEND
+#define DEV_ASYNC_RESUME 2
+#define DEV_ASYNC_ACTIONS_ALL (DEV_ASYNC_SUSPEND | \
+ DEV_ASYNC_RESUME)
extern int dev_async_schedule(struct device *, void *,
void *, int);
Index: linux-2.6/drivers/base/async_dev.c
===================================================================
--- linux-2.6.orig/drivers/base/async_dev.c
+++ linux-2.6/drivers/base/async_dev.c
@@ -36,6 +36,7 @@ static int dev_action(struct device *dev
switch (type) {
case DEV_ASYNC_SUSPEND:
+ case DEV_ASYNC_RESUME:
error = ((dev_async_suspend)func)(dev, *((pm_message_t *)data));
break;
default:
--
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