Staging: hv: Eliminate device_id from vm_device

Both device abstractions: vm_device and hv_device maintain state
to reperesent the device instance (and they refer to them by different
names - device_id in vm_device and dev_instance in hv_device).
In preparation for consolidating all device state in
struct hv_device; eliminate device_id from struct vm_device.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/vmbus.h

@@ -30,7 +30,6 @@
 
 
 struct vm_device {
-	struct hv_guid device_id;
 	struct hv_device device_obj;
 	struct device device;
 };

drivers/staging/hv/vmbus_drv.c

@@ -546,8 +546,6 @@ static int vmbus_bus_init(void)
 	}
 	/* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */
 	dev_set_name(&dev_ctx->device, "vmbus_0_0");
-	memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.dev_instance,
-		sizeof(struct hv_guid));
 
 	/* No need to bind a driver to the root device. */
 	dev_ctx->device.parent = NULL;
@@ -702,7 +700,6 @@ struct hv_device *vmbus_child_device_create(struct hv_guid *type,
 	memcpy(&child_device_obj->dev_instance, instance,
 	       sizeof(struct hv_guid));
 
-	memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid));
 
 	return child_device_obj;
 }
@@ -826,22 +823,22 @@ static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
 	ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={"
 			     "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
 			     "%02x%02x%02x%02x%02x%02x%02x%02x}",
-			     device_ctx->device_id.data[3],
-			     device_ctx->device_id.data[2],
-			     device_ctx->device_id.data[1],
-			     device_ctx->device_id.data[0],
-			     device_ctx->device_id.data[5],
-			     device_ctx->device_id.data[4],
-			     device_ctx->device_id.data[7],
-			     device_ctx->device_id.data[6],
-			     device_ctx->device_id.data[8],
-			     device_ctx->device_id.data[9],
-			     device_ctx->device_id.data[10],
-			     device_ctx->device_id.data[11],
-			     device_ctx->device_id.data[12],
-			     device_ctx->device_id.data[13],
-			     device_ctx->device_id.data[14],
-			     device_ctx->device_id.data[15]);
+			     dev->dev_instance.data[3],
+			     dev->dev_instance.data[2],
+			     dev->dev_instance.data[1],
+			     dev->dev_instance.data[0],
+			     dev->dev_instance.data[5],
+			     dev->dev_instance.data[4],
+			     dev->dev_instance.data[7],
+			     dev->dev_instance.data[6],
+			     dev->dev_instance.data[8],
+			     dev->dev_instance.data[9],
+			     dev->dev_instance.data[10],
+			     dev->dev_instance.data[11],
+			     dev->dev_instance.data[12],
+			     dev->dev_instance.data[13],
+			     dev->dev_instance.data[14],
+			     dev->dev_instance.data[15]);
 	if (ret)
 		return ret;