3.16.7-ckt5 -stable review patch. If anyone has any objections, please let me know.
------------------
From: "Rafael J. Wysocki" <rafael.j.wysocki@xxxxxxxxx>
commit c12f07d17c12193256a99e20c9a0f130fb8f7be8 upstream.
ACPICA commit c49dbfed2bc069d0038ea7e1294409bfde7c2c8c
Some potential callers of acpi_setup_gpe_for_wake may know in advance that
there won't be any notify handlers installed for device wake notifications
from the given GPE (one example is a button GPE in Linux). For these cases,
acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake.
This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to
setup implicit wake notification for it (since there's no handler method).
Rafael Wysocki.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx>
Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx>
Cc: Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
drivers/acpi/acpica/evxfgpe.c | 47 +++++++++++++++++++++++++++++++++++++++++++
include/acpi/acpixf.h | 4 ++++
2 files changed, 51 insertions(+)
diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c
index cb534faf5369..e5e21b24bb2a 100644
--- a/drivers/acpi/acpica/evxfgpe.c
+++ b/drivers/acpi/acpica/evxfgpe.c
@@ -179,6 +179,53 @@ ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
/*******************************************************************************
*
+ * FUNCTION: acpi_mark_gpe_for_wake
+ *
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
+ * gpe_number - GPE level within the GPE block
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply
+ * sets the ACPI_GPE_CAN_WAKE flag.
+ *
+ * Some potential callers of acpi_setup_gpe_for_wake may know in advance that
+ * there won't be any notify handlers installed for device wake notifications
+ * from the given GPE (one example is a button GPE in Linux). For these cases,
+ * acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake.
+ * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to
+ * setup implicit wake notification for it (since there's no handler method).
+ *
+ ******************************************************************************/
+acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number)
+{
+ struct acpi_gpe_event_info *gpe_event_info;
+ acpi_status status = AE_BAD_PARAMETER;
+ acpi_cpu_flags flags;
+
+ ACPI_FUNCTION_TRACE(acpi_mark_gpe_for_wake);
+
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+ /* Ensure that we have a valid GPE number */
+
+ gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+ if (gpe_event_info) {
+
+ /* Mark the GPE as a possible wake event */
+
+ gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
+ status = AE_OK;
+ }
+
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_mark_gpe_for_wake)
+
+/*******************************************************************************
+ *
* FUNCTION: acpi_setup_gpe_for_wake
*
* PARAMETERS: wake_device - Device associated with the GPE (via _PRW)
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 35b525c19711..6c77a132b53b 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -658,6 +658,10 @@ ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
u32 gpe_number))
ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+ acpi_mark_gpe_for_wake(acpi_handle gpe_device,
+ u32 gpe_number))
+
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
acpi_setup_gpe_for_wake(acpi_handle
parent_device,
acpi_handle gpe_device,
--
2.1.4
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