diff options
Diffstat (limited to 'drivers/usb/gadget/function/f_ncm.c')
| -rw-r--r-- | drivers/usb/gadget/function/f_ncm.c | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c index d5c47e7a7f61..2d6e76e4cffa 100644 --- a/drivers/usb/gadget/function/f_ncm.c +++ b/drivers/usb/gadget/function/f_ncm.c @@ -23,6 +23,7 @@ #include "u_ether.h" #include "u_ether_configfs.h" #include "u_ncm.h" +#include "configfs.h" /* * This function is a "CDC Network Control Model" (CDC NCM) Ethernet link. @@ -1391,6 +1392,16 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f) return -EINVAL; ncm_opts = container_of(f->fi, struct f_ncm_opts, func_inst); + + if (cdev->use_os_string) { + f->os_desc_table = kzalloc(sizeof(*f->os_desc_table), + GFP_KERNEL); + if (!f->os_desc_table) + return -ENOMEM; + f->os_desc_n = 1; + f->os_desc_table[0].os_desc = &ncm_opts->ncm_os_desc; + } + /* * in drivers/usb/gadget/configfs.c:configfs_composite_bind() * configurations are bound in sequence with list_for_each_entry, @@ -1404,13 +1415,15 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f) status = gether_register_netdev(ncm_opts->net); mutex_unlock(&ncm_opts->lock); if (status) - return status; + goto fail; ncm_opts->bound = true; } us = usb_gstrings_attach(cdev, ncm_strings, ARRAY_SIZE(ncm_string_defs)); - if (IS_ERR(us)) - return PTR_ERR(us); + if (IS_ERR(us)) { + status = PTR_ERR(us); + goto fail; + } ncm_control_intf.iInterface = us[STRING_CTRL_IDX].id; ncm_data_nop_intf.iInterface = us[STRING_DATA_IDX].id; ncm_data_intf.iInterface = us[STRING_DATA_IDX].id; @@ -1427,6 +1440,10 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f) ncm_control_intf.bInterfaceNumber = status; ncm_union_desc.bMasterInterface0 = status; + if (cdev->use_os_string) + f->os_desc_table[0].if_id = + ncm_iad_desc.bFirstInterface; + status = usb_interface_id(c, f); if (status < 0) goto fail; @@ -1506,6 +1523,9 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f) return 0; fail: + kfree(f->os_desc_table); + f->os_desc_n = 0; + if (ncm->notify_req) { kfree(ncm->notify_req->buf); usb_ep_free_request(ncm->notify, ncm->notify_req); @@ -1560,16 +1580,22 @@ static void ncm_free_inst(struct usb_function_instance *f) gether_cleanup(netdev_priv(opts->net)); else free_netdev(opts->net); + kfree(opts->ncm_interf_group); kfree(opts); } static struct usb_function_instance *ncm_alloc_inst(void) { struct f_ncm_opts *opts; + struct usb_os_desc *descs[1]; + char *names[1]; + struct config_group *ncm_interf_group; opts = kzalloc(sizeof(*opts), GFP_KERNEL); if (!opts) return ERR_PTR(-ENOMEM); + opts->ncm_os_desc.ext_compat_id = opts->ncm_ext_compat_id; + mutex_init(&opts->lock); opts->func_inst.free_func_inst = ncm_free_inst; opts->net = gether_setup_default(); @@ -1578,8 +1604,20 @@ static struct usb_function_instance *ncm_alloc_inst(void) kfree(opts); return ERR_CAST(net); } + INIT_LIST_HEAD(&opts->ncm_os_desc.ext_prop); + + descs[0] = &opts->ncm_os_desc; + names[0] = "ncm"; config_group_init_type_name(&opts->func_inst.group, "", &ncm_func_type); + ncm_interf_group = + usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs, + names, THIS_MODULE); + if (IS_ERR(ncm_interf_group)) { + ncm_free_inst(&opts->func_inst); + return ERR_CAST(ncm_interf_group); + } + opts->ncm_interf_group = ncm_interf_group; return &opts->func_inst; } @@ -1605,6 +1643,9 @@ static void ncm_unbind(struct usb_configuration *c, struct usb_function *f) hrtimer_cancel(&ncm->task_timer); + kfree(f->os_desc_table); + f->os_desc_n = 0; + ncm_string_defs[0].id = 0; usb_free_all_descriptors(f); |