[PATCH v2 2/7] ACPI: Add an interface to evaluate _OST
From: Toshi Kani <hidden>
Date: 2012-05-08 20:18:35
Also in:
lkml
Subsystem:
acpi, acpi component architecture (acpica), the rest · Maintainers:
"Rafael J. Wysocki", Saket Dumbre, Linus Torvalds
Added acpi_evaluate_hotplug_opt(). This function evaluates _OST for hotplug operations. This function is stubbed out when CONFIG_ACPI_HOTPLUG_OST is disabled. Signed-off-by: Toshi Kani <redacted> --- drivers/acpi/utils.c | 38 ++++++++++++++++++++++++++++++++++++++ include/acpi/acpi_bus.h | 3 +++ 2 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index b002a47..39d7349 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c@@ -382,3 +382,41 @@ acpi_evaluate_reference(acpi_handle handle, } EXPORT_SYMBOL(acpi_evaluate_reference); + +/* + * acpi_evaluate_hotplug_ost: Evaluate _OST for hotplug operations + * @handle: ACPI device handle + * @source_event: source event code + * @status_code: status code + * @status_buf: optional detailed information (NULL if none) + */ +acpi_status +acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event, + u32 status_code, struct acpi_buffer *status_buf) +{ +#ifdef CONFIG_ACPI_HOTPLUG_OST + union acpi_object params[3] = { + {.type = ACPI_TYPE_INTEGER,}, + {.type = ACPI_TYPE_INTEGER,}, + {.type = ACPI_TYPE_BUFFER,} + }; + struct acpi_object_list arg_list = {3, params}; + acpi_status status; + + params[0].integer.value = source_event; + params[1].integer.value = status_code; + if (status_buf != NULL) { + params[2].buffer.pointer = status_buf->pointer; + params[2].buffer.length = status_buf->length; + } else { + params[2].buffer.pointer = NULL; + params[2].buffer.length = 0; + } + + status = acpi_evaluate_object(handle, "_OST", &arg_list, NULL); + return status; +#else + return AE_OK; +#endif +} +EXPORT_SYMBOL(acpi_evaluate_hotplug_ost);
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index f1c8ca6..7309113 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h@@ -50,6 +50,9 @@ acpi_evaluate_reference(acpi_handle handle, acpi_string pathname, struct acpi_object_list *arguments, struct acpi_handle_list *list); +acpi_status +acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event, + u32 status_code, struct acpi_buffer *status_buf); #ifdef CONFIG_ACPI
--
1.7.7.6