[RFC PATCH 3/6] ACPI: Runtime resume all devices covered by a power resource
From: Lin Ming <hidden>
Date: 2012-02-13 09:12:55
Also in:
linux-scsi, lkml
Subsystem:
acpi, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
From: Zhang Rui <rui.zhang@intel.com> When an ACPI Power Resource is turned on, we should runtime resume all the devices covered by this ACPI Power Resource. So that they have a chance to runtime suspend again. Or else, they will be in uninitialized state after powered on. Signed-off-by: Zhang Rui <rui.zhang@intel.com> --- drivers/acpi/power.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index a7e2305..86791e3 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c@@ -40,6 +40,7 @@ #include <linux/init.h> #include <linux/types.h> #include <linux/slab.h> +#include <linux/pm_runtime.h> #include <acpi/acpi_bus.h> #include <acpi/acpi_drivers.h> #include "sleep.h"
@@ -201,6 +202,7 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state) static int __acpi_power_on(struct acpi_power_resource *resource) { acpi_status status = AE_OK; + struct acpi_powered_device *apd; status = acpi_evaluate_object(resource->device->handle, "_ON", NULL, NULL); if (ACPI_FAILURE(status))
@@ -212,6 +214,13 @@ static int __acpi_power_on(struct acpi_power_resource *resource) ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned on\n", resource->name)); + /* resume all the devices when power resource is turned on */ + list_for_each_entry(apd, &resource->devices, node){ + pm_request_resume(apd->dev); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "resume device %s\n", + apd->dev->kobj.name)); + } + return 0; }
--
1.7.2.5