staging: hv: change rndis_filter_device_remove() to void return type

rndis_filter_device_remove() always return 0, so change it to void return
type. Also cleaned up the error checking in the caller.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/hyperv_net.h

@@ -101,7 +101,7 @@ int rndis_filter_open(struct hv_device *dev);
 int rndis_filter_close(struct hv_device *dev);
 int rndis_filte_device_add(struct hv_device *dev,
 			void *additional_info);
-int rndis_filter_device_remove(struct hv_device *dev);
+void rndis_filter_device_remove(struct hv_device *dev);
 int rndis_filter_receive(struct hv_device *dev,
 			struct hv_netvsc_packet *pkt);
 

drivers/staging/hv/netvsc_drv.c

@@ -387,7 +387,6 @@ static int netvsc_probe(struct hv_device *dev)
 static int netvsc_remove(struct hv_device *dev)
 {
 	struct net_device *net = dev_get_drvdata(&dev->device);
-	int ret;
 
 	if (net == NULL) {
 		dev_err(&dev->device, "No net device to remove\n");
@@ -404,14 +403,10 @@ static int netvsc_remove(struct hv_device *dev)
 	 * Call to the vsc driver to let it know that the device is being
 	 * removed
 	 */
-	ret = rndis_filter_device_remove(dev);
-	if (ret != 0) {
-		/* TODO: */
-		netdev_err(net, "unable to remove vsc device (ret %d)\n", ret);
-	}
+	rndis_filter_device_remove(dev);
 
 	free_netdev(net);
-	return ret;
+	return 0;
 }
 
 /* The one and only one */

drivers/staging/hv/rndis_filter.c

@@ -741,7 +741,7 @@ int rndis_filte_device_add(struct hv_device *dev,
 	return ret;
 }
 
-int rndis_filter_device_remove(struct hv_device *dev)
+void rndis_filter_device_remove(struct hv_device *dev)
 {
 	struct netvsc_device *net_dev = dev->ext;
 	struct rndis_device *rndis_dev = net_dev->extension;
@@ -753,8 +753,6 @@ int rndis_filter_device_remove(struct hv_device *dev)
 	net_dev->extension = NULL;
 
 	netvsc_device_remove(dev);
-
-	return 0;
 }