asus-laptop: simplify write_acpi_int

We only need a buffer for "INIT". Adds write_acpi_init_ret for it.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>

drivers/platform/x86/asus-laptop.c

@@ -352,8 +352,8 @@ static struct key_entry asus_keymap[] = {
  *
  * returns 0 if write is successful, -1 else.
  */
-static int write_acpi_int(acpi_handle handle, const char *method, int val,
-			  struct acpi_buffer *output)
+static int write_acpi_int_ret(acpi_handle handle, const char *method, int val,
+			      struct acpi_buffer *output)
 {
 	struct acpi_object_list params;	/* list of input parameters (an int) */
 	union acpi_object in_obj;	/* the only param we use */
@@ -374,6 +374,11 @@ static int write_acpi_int(acpi_handle handle, const char *method, int val,
 		return -1;
 }
 
+static int write_acpi_int(acpi_handle handle, const char *method, int val)
+{
+	return write_acpi_int_ret(handle, method, val, NULL);
+}
+
 static int read_wireless_status(int mask)
 {
 	unsigned long long status;
@@ -437,7 +442,7 @@ static void write_status(acpi_handle handle, int out, int mask)
 		break;
 	}
 
-	if (write_acpi_int(handle, NULL, out, NULL))
+	if (write_acpi_int(handle, NULL, out))
 		pr_warning(" write failed %x\n", mask);
 }
 
@@ -496,7 +501,7 @@ static int set_kled_lvl(int kblv)
 	else
 		kblv = 0;
 
-	if (write_acpi_int(kled_set_handle, NULL, kblv, NULL)) {
+	if (write_acpi_int(kled_set_handle, NULL, kblv)) {
 		pr_warning("Keyboard LED display write failed\n");
 		return -EINVAL;
 	}
@@ -571,7 +576,7 @@ static int read_brightness(struct backlight_device *bd)
 
 static int set_brightness(struct backlight_device *bd, int value)
 {
-	if (write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
+	if (write_acpi_int(brightness_set_handle, NULL, value)) {
 		pr_warning("Error changing brightness\n");
 		return -EIO;
 	}
@@ -710,7 +715,7 @@ static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
 
 	rv = parse_arg(buf, count, &value);
 	if (rv > 0) {
-		if (write_acpi_int(ledd_set_handle, NULL, value, NULL))
+		if (write_acpi_int(ledd_set_handle, NULL, value))
 			pr_warning("LED display write failed\n");
 		else
 			hotk->ledd_status = (u32) value;
@@ -755,7 +760,7 @@ static ssize_t store_bluetooth(struct device *dev,
 static void set_display(int value)
 {
 	/* no sanity check needed for now */
-	if (write_acpi_int(display_set_handle, NULL, value, NULL))
+	if (write_acpi_int(display_set_handle, NULL, value))
 		pr_warning("Error setting display\n");
 	return;
 }
@@ -814,7 +819,7 @@ static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
  */
 static void set_light_sens_switch(int value)
 {
-	if (write_acpi_int(ls_switch_handle, NULL, value, NULL))
+	if (write_acpi_int(ls_switch_handle, NULL, value))
 		pr_warning("Error setting light sensor switch\n");
 	hotk->light_switch = value;
 }
@@ -839,7 +844,7 @@ static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
 
 static void set_light_sens_level(int value)
 {
-	if (write_acpi_int(ls_level_handle, NULL, value, NULL))
+	if (write_acpi_int(ls_level_handle, NULL, value))
 		pr_warning("Error setting light sensor level\n");
 	hotk->light_level = value;
 }
@@ -1104,7 +1109,7 @@ static int asus_hotk_get_info(void)
 		pr_warning("Couldn't get the DSDT table header\n");
 
 	/* We have to write 0 on init this far for all ASUS models */
-	if (write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
+	if (write_acpi_int_ret(hotk->handle, "INIT", 0, &buffer)) {
 		pr_err("Hotkey initialization failed\n");
 		return -ENODEV;
 	}
@@ -1119,7 +1124,7 @@ static int asus_hotk_get_info(void)
 		       (uint) bsts_result);
 
 	/* This too ... */
-	write_acpi_int(hotk->handle, "CWAP", wapf, NULL);
+	write_acpi_int(hotk->handle, "CWAP", wapf);
 
 	/*
 	 * Try to match the object returned by INIT to the specific model.