1 files changed, 30 insertions, 2 deletions

diff --git a/drivers/usb/gadget/function/f_rndis.c b/drivers/usb/gadget/function/f_rndis.c
index 16562e461121..c7c5b3ce1d98 100644
--- a/drivers/usb/gadget/function/f_rndis.c
+++ b/drivers/usb/gadget/function/f_rndis.c
@@ -691,6 +691,10 @@ rndis_bind(struct usb_configuration *c, struct usb_function *f)
 		f->os_desc_table[0].os_desc = &rndis_opts->rndis_os_desc;
 	}
 
+	rndis_iad_descriptor.bFunctionClass = rndis_opts->class;
+	rndis_iad_descriptor.bFunctionSubClass = rndis_opts->subclass;
+	rndis_iad_descriptor.bFunctionProtocol = rndis_opts->protocol;
+
 	/*
 	 * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
 	 * configurations are bound in sequence with list_for_each_entry,
@@ -866,11 +870,23 @@ USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(rndis);
 /* f_rndis_opts_ifname */
 USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(rndis);
 
+/* f_rndis_opts_class */
+USB_ETHER_CONFIGFS_ITEM_ATTR_U8_RW(rndis, class);
+
+/* f_rndis_opts_subclass */
+USB_ETHER_CONFIGFS_ITEM_ATTR_U8_RW(rndis, subclass);
+
+/* f_rndis_opts_protocol */
+USB_ETHER_CONFIGFS_ITEM_ATTR_U8_RW(rndis, protocol);
+
 static struct configfs_attribute *rndis_attrs[] = {
 	&rndis_opts_attr_dev_addr,
 	&rndis_opts_attr_host_addr,
 	&rndis_opts_attr_qmult,
 	&rndis_opts_attr_ifname,
+	&rndis_opts_attr_class,
+	&rndis_opts_attr_subclass,
+	&rndis_opts_attr_protocol,
 	NULL,
 };
 
@@ -892,6 +908,7 @@ static void rndis_free_inst(struct usb_function_instance *f)
 			free_netdev(opts->net);
 	}
 
+	kfree(opts->rndis_interf_group);	/* single VLA chunk */
 	kfree(opts);
 }
 
@@ -900,6 +917,7 @@ static struct usb_function_instance *rndis_alloc_inst(void)
 	struct f_rndis_opts *opts;
 	struct usb_os_desc *descs[1];
 	char *names[1];
+	struct config_group *rndis_interf_group;
 
 	opts = kzalloc(sizeof(*opts), GFP_KERNEL);
 	if (!opts)
@@ -916,12 +934,22 @@ static struct usb_function_instance *rndis_alloc_inst(void)
 	}
 	INIT_LIST_HEAD(&opts->rndis_os_desc.ext_prop);
 
+	opts->class = rndis_iad_descriptor.bFunctionClass;
+	opts->subclass = rndis_iad_descriptor.bFunctionSubClass;
+	opts->protocol = rndis_iad_descriptor.bFunctionProtocol;
+
 	descs[0] = &opts->rndis_os_desc;
 	names[0] = "rndis";
 	config_group_init_type_name(&opts->func_inst.group, "",
 				    &rndis_func_type);
-	usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
-				       names, THIS_MODULE);
+	rndis_interf_group =
+		usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
+					       names, THIS_MODULE);
+	if (IS_ERR(rndis_interf_group)) {
+		rndis_free_inst(&opts->func_inst);
+		return ERR_CAST(rndis_interf_group);
+	}
+	opts->rndis_interf_group = rndis_interf_group;
 
 	return &opts->func_inst;
 }