2010/11/28 Rafael J. Wysocki <rjw@xxxxxxx>:
> From: Rafael J. Wysocki <rjw@xxxxxxx>
>
> Currently dpm_prepare() returns error code if it finds that a device
> being suspended has a pending runtime resume request. However, it
> should not do that if the checking for wakeup events is not enabled.
> On the other hand, if the checking for wakeup events is enabled, it
> can return error when a wakeup event is detected, regardless of its
> source.
>
> Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
> ---
> drivers/base/power/main.c | 11 +++++++----
> 1 file changed, 7 insertions(+), 4 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
> @@ -26,6 +26,7 @@
> #include <linux/interrupt.h>
> #include <linux/sched.h>
> #include <linux/async.h>
> +#include <linux/suspend.h>
>
> #include "../base.h"
> #include "power.h"
> @@ -1052,8 +1053,10 @@ static int dpm_prepare(pm_message_t stat
> mutex_unlock(&dpm_list_mtx);
>
> pm_runtime_get_noresume(dev);
> - if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) {
> - /* Wake-up requested during system sleep transition. */
> + if (pm_runtime_barrier(dev) && device_may_wakeup(dev))
> + pm_wakeup_event(dev, 0);
> +
> + if (pm_check_wakeup_events()) {
If pm_check_wakeup_events returns true, it means there is no wakeup event
coming, so seems should handle normal suspend prepare, but why
abort the suspend here?
> pm_runtime_put_sync(dev);
> error = -EBUSY;
> } else {
thanks,
--
Lei Ming
_______________________________________________
linux-pm mailing list
linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linux-foundation.org/mailman/listinfo/linux-pm
