[PATCH 14/14] dell-led: use dell_smbios_send_request() for SMBIOS requests

[Michał Kępień <kernel@xxxxxxxxxx>]

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

Signed-off-by: Michał Kępień <kernel@xxxxxxxxxx>
---
 drivers/leds/dell-led.c |   64 ++++-------------------------------------------
 1 file changed, 5 insertions(+), 59 deletions(-)

diff --git a/drivers/leds/dell-led.c b/drivers/leds/dell-led.c
index bfa7511..a9c04bf 100644
--- a/drivers/leds/dell-led.c
+++ b/drivers/leds/dell-led.c
@@ -43,64 +43,12 @@ 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_token *token;
-	struct app_wmi_args args;
 
 	if (!wmi_has_guid(DELL_APP_GUID))
 		return -ENODEV;
@@ -115,13 +63,11 @@ 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);
+	dell_smbios_get_buffer();
+	dell_smbios_buffer->input[0] = token->location;
+	dell_smbios_buffer->input[1] = token->value;
+	dell_smbios_send_request(1, 0);
+	dell_smbios_release_buffer();
 
 	return state;
 }
-- 
1.7.10.4

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