platform/x86: ideapad-laptop: Refactor ideapad_sync_touchpad_state()

Add an error exit for read_ec_data() failing instead of putting the main
body in an if (success) block.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Tested-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Tested-by: Maxim Mikityanskiy <maxtram95@gmail.com>
Link: https://lore.kernel.org/r/20221117110244.67811-2-hdegoede@redhat.com

drivers/platform/x86/ideapad-laptop.c

@@ -1490,13 +1490,17 @@ static void ideapad_kbd_bl_exit(struct ideapad_private *priv)
 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
 {
 	unsigned long value;
+	unsigned char param;
+	int ret;
 
 	if (!priv->features.touchpad_ctrl_via_ec)
 		return;
 
 	/* Without reading from EC touchpad LED doesn't switch state */
-	if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
-		unsigned char param;
+	ret = read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value);
+	if (ret)
+		return;
+
 	/*
 	 * Some IdeaPads don't really turn off touchpad - they only
 	 * switch the LED state. We (de)activate KBC AUX port to turn
@@ -1506,7 +1510,6 @@ static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
 	i8042_command(&param, value ? I8042_CMD_AUX_ENABLE : I8042_CMD_AUX_DISABLE);
 	ideapad_input_report(priv, value ? 67 : 66);
 	sysfs_notify(&priv->platform_device->dev.kobj, NULL, "touchpad");
-	}
 }
 
 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)