[PATCH v2 16/16] dell-led: use dell_smbios_send_request() for performing SMBIOS calls

[Michał Kępień]

Instead of using the WMI wrapper, dell-led can take advantage of
dell_smbios_send_request() for performing the SMBIOS calls required to
change the state of the microphone LED.

Signed-off-by: Michał Kępień <ker...@kempniu.pl>
Acked-by: Jacek Anaszewski <j.anaszew...@samsung.com>
---
 drivers/leds/dell-led.c |   65 +++++------------------------------------------
 1 file changed, 6 insertions(+), 59 deletions(-)

diff --git a/drivers/leds/dell-led.c b/drivers/leds/dell-led.c
index bfa7511..b3d6e9c 100644
--- a/drivers/leds/dell-led.c
+++ b/drivers/leds/dell-led.c
@@ -43,64 +43,13 @@ MODULE_ALIAS("wmi:" DELL_LED_BIOS_GUID);
 #define CMD_LED_OFF    17
 #define CMD_LED_BLINK  18
 
-struct app_wmi_args {
-       u16 class;
-       u16 selector;
-       u32 arg1;
-       u32 arg2;
-       u32 arg3;
-       u32 arg4;
-       u32 res1;
-       u32 res2;
-       u32 res3;
-       u32 res4;
-       char dummy[92];
-};
-
 #define GLOBAL_MIC_MUTE_ENABLE 0x364
 #define GLOBAL_MIC_MUTE_DISABLE        0x365
 
-static int dell_wmi_perform_query(struct app_wmi_args *args)
-{
-       struct app_wmi_args *bios_return;
-       union acpi_object *obj;
-       struct acpi_buffer input;
-       struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
-       acpi_status status;
-       u32 rc = -EINVAL;
-
-       input.length = 128;
-       input.pointer = args;
-
-       status = wmi_evaluate_method(DELL_APP_GUID, 0, 1, &input, &output);
-       if (!ACPI_SUCCESS(status))
-               goto err_out0;
-
-       obj = output.pointer;
-       if (!obj)
-               goto err_out0;
-
-       if (obj->type != ACPI_TYPE_BUFFER)
-               goto err_out1;
-
-       bios_return = (struct app_wmi_args *)obj->buffer.pointer;
-       rc = bios_return->res1;
-       if (rc)
-               goto err_out1;
-
-       memcpy(args, bios_return, sizeof(struct app_wmi_args));
-       rc = 0;
-
- err_out1:
-       kfree(obj);
- err_out0:
-       return rc;
-}
-
 static int dell_micmute_led_set(int state)
 {
+       struct calling_interface_buffer *buffer;
        struct calling_interface_token *token;
-       struct app_wmi_args args;
 
        if (!wmi_has_guid(DELL_APP_GUID))
                return -ENODEV;
@@ -115,13 +64,11 @@ static int dell_micmute_led_set(int state)
        if (!token)
                return -ENODEV;
 
-       memset(&args, 0, sizeof(struct app_wmi_args));
-
-       args.class = 1;
-       args.arg1 = token->location;
-       args.arg2 = token->value;
-
-       dell_wmi_perform_query(&args);
+       buffer = dell_smbios_get_buffer();
+       buffer->input[0] = token->location;
+       buffer->input[1] = token->value;
+       dell_smbios_send_request(1, 0);
+       dell_smbios_release_buffer();
 
        return state;
 }
-- 
1.7.10.4