[Patch V2 3/9] ACPI: Add acpi_bus_attach_private_data() to facilitate to attach data to ACPI handle

[Lan Tianyu]

There is already acpi_bus_get_private_data() to get ACPI handle data
which is associated with acpi_bus_private_data_handler(). This patch
is to add acpi_bus_attach_private_data() to make a pair and facilitate
to attach and get data to/from ACPI handle.

Reviewed-by: Mika Westerberg <mika.westerb...@linux.intel.com>
Signed-off-by: Lan Tianyu <tianyu....@intel.com>
---
 drivers/acpi/bus.c      | 18 +++++++++++++++++-
 include/acpi/acpi_bus.h |  1 +
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index e7e5844..4ed8d48 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -132,6 +132,22 @@ void acpi_bus_private_data_handler(acpi_handle handle,
 }
 EXPORT_SYMBOL(acpi_bus_private_data_handler);
 
+int acpi_bus_attach_private_data(acpi_handle handle, void *data)
+{
+       acpi_status status;
+
+       status = acpi_attach_data(handle,
+                       acpi_bus_private_data_handler, data);
+       if (ACPI_FAILURE(status)) {
+               ACPI_ERROR((AE_INFO, "Error attaching device[%p] data\n",
+                               handle));
+               return -ENODEV;
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL(acpi_bus_attach_private_data);
+
 int acpi_bus_get_private_data(acpi_handle handle, void **data)
 {
        acpi_status status;
@@ -141,7 +157,7 @@ int acpi_bus_get_private_data(acpi_handle handle, void 
**data)
 
        status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
        if (ACPI_FAILURE(status) || !*data) {
-               ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
+               ACPI_ERROR((AE_INFO, "No context for object [%p]\n",
                                handle));
                return -ENODEV;
        }
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 84a2e29..a1f6fec 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -406,6 +406,7 @@ extern struct kobject *acpi_kobj;
 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 void acpi_bus_private_data_handler(acpi_handle, void *);
 int acpi_bus_get_private_data(acpi_handle, void **);
+int acpi_bus_attach_private_data(acpi_handle, void *);
 void acpi_bus_no_hotplug(acpi_handle handle);
 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 extern int register_acpi_notifier(struct notifier_block *);
-- 
1.8.3.1

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