From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lin Ming Subject: [RFC PATCH 3/6] ACPI: Runtime resume all devices covered by a power resource Date: Mon, 13 Feb 2012 17:11:08 +0800 Message-ID: <1329124271-29464-4-git-send-email-ming.m.lin@intel.com> References: <1329124271-29464-1-git-send-email-ming.m.lin@intel.com> Return-path: In-Reply-To: <1329124271-29464-1-git-send-email-ming.m.lin@intel.com> Sender: linux-kernel-owner@vger.kernel.org To: Zhang Rui , Jeff Garzik , Alan Stern , Tejun Heo , "Rafael J. Wysocki" , Len Brown Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, linux-pm@vger.kernel.org List-Id: linux-scsi@vger.kernel.org From: Zhang Rui 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 --- 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 #include #include +#include #include #include #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