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Commit f5e2e0bc authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "usb: gadget: f_rndis: allocate/free net device upon driver bind/unbind"

parents d7299fd0 200f4849

drivers/usb/gadget/function/f_rndis.c

+23 −14
Original line number Diff line number Diff line
@@ -766,18 +766,31 @@ rndis_bind(struct usb_configuration *c, struct usb_function *f) 
	 * with regard to rndis_opts->bound access

	 */

	if (!rndis_opts->bound) {

		mutex_lock(&rndis_opts->lock);

		rndis_opts->net = gether_setup_default();

		if (IS_ERR(rndis_opts->net)) {

			status = PTR_ERR(rndis_opts->net);

			mutex_unlock(&rndis_opts->lock);

			goto error;

		}

		gether_set_gadget(rndis_opts->net, cdev->gadget);

		status = gether_register_netdev(rndis_opts->net);

		if (status)

			goto fail;

		mutex_unlock(&rndis_opts->lock);

		if (status) {

			free_netdev(rndis_opts->net);

			goto error;

		}

		rndis_opts->bound = true;

	}



	gether_get_host_addr_u8(rndis_opts->net, rndis->ethaddr);

	rndis->port.ioport = netdev_priv(rndis_opts->net);



	us = usb_gstrings_attach(cdev, rndis_strings,

				 ARRAY_SIZE(rndis_string_defs));

	if (IS_ERR(us)) {

		status = PTR_ERR(us);

		goto fail;

		goto netdev_cleanup;

	}

	rndis_control_intf.iInterface = us[0].id;

	rndis_data_intf.iInterface = us[1].id;
@@ -894,7 +907,9 @@ rndis_bind(struct usb_configuration *c, struct usb_function *f) 
		kfree(rndis->notify_req->buf);

		usb_ep_free_request(rndis->notify, rndis->notify_req);

	}



netdev_cleanup:

	gether_cleanup(rndis->port.ioport);

error:

	ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);



	return status;
@@ -957,8 +972,6 @@ static void rndis_free_inst(struct usb_function_instance *f) 
	if (!opts->borrowed_net) {

		if (opts->bound)

			gether_cleanup(netdev_priv(opts->net));

		else

			free_netdev(opts->net);

	}



	kfree(opts->rndis_interf_group);	/* single VLA chunk */
@@ -980,12 +993,6 @@ static struct usb_function_instance *rndis_alloc_inst(void) 
	mutex_init(&opts->lock);

	spin_lock_init(&_rndis_lock);

	opts->func_inst.free_func_inst = rndis_free_inst;

	opts->net = gether_setup_default();

	if (IS_ERR(opts->net)) {

		struct net_device *net = opts->net;

		kfree(opts);

		return ERR_CAST(net);

	}

	INIT_LIST_HEAD(&opts->rndis_os_desc.ext_prop);



	descs[0] = &opts->rndis_os_desc;
@@ -1025,6 +1032,8 @@ static void rndis_free(struct usb_function *f) 
static void rndis_unbind(struct usb_configuration *c, struct usb_function *f)

{

	struct f_rndis		*rndis = func_to_rndis(f);

	struct f_rndis_opts	*opts = container_of(f->fi, struct f_rndis_opts,

								func_inst);



	kfree(f->os_desc_table);

	f->os_desc_n = 0;
@@ -1032,6 +1041,8 @@ static void rndis_unbind(struct usb_configuration *c, struct usb_function *f) 


	kfree(rndis->notify_req->buf);

	usb_ep_free_request(rndis->notify, rndis->notify_req);

	gether_cleanup(rndis->port.ioport);

	opts->bound = false;

}



static struct usb_function *rndis_alloc(struct usb_function_instance *fi)
@@ -1051,11 +1062,9 @@ static struct usb_function *rndis_alloc(struct usb_function_instance *fi) 
	mutex_lock(&opts->lock);

	opts->refcnt++;



	gether_get_host_addr_u8(opts->net, rndis->ethaddr);

	rndis->vendorID = opts->vendor_id;

	rndis->manufacturer = opts->manufacturer;



	rndis->port.ioport = netdev_priv(opts->net);

	mutex_unlock(&opts->lock);

	/* RNDIS activates when the host changes this filter */

	rndis->port.cdc_filter = 0;