ACPICA: Improve parameter validation for acpi_install_gpe_block.
Add the following checks:
1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
2) There is not already a gpe block attached to the device.
Likewise, with acpi_remove_gpe_block, ensure that the incoming object
is a device.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c
index 5713da7..b84f8e2 100644
--- a/drivers/acpi/acpica/evxfgpe.c
+++ b/drivers/acpi/acpica/evxfgpe.c
@@ -583,6 +583,18 @@
goto unlock_and_exit;
}
+ /* Validate the parent device */
+
+ if (node->type != ACPI_TYPE_DEVICE) {
+ status = AE_TYPE;
+ goto unlock_and_exit;
+ }
+
+ if (node->object) {
+ status = AE_ALREADY_EXISTS;
+ goto unlock_and_exit;
+ }
+
/*
* For user-installed GPE Block Devices, the gpe_block_base_number
* is always zero
@@ -666,6 +678,13 @@
goto unlock_and_exit;
}
+ /* Validate the parent device */
+
+ if (node->type != ACPI_TYPE_DEVICE) {
+ status = AE_TYPE;
+ goto unlock_and_exit;
+ }
+
/* Get the device_object attached to the node */
obj_desc = acpi_ns_get_attached_object(node);
