From 1ae1602de028acaa42a0f6ff18d19756f8e825c6 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 26 Feb 2016 11:02:14 +0100 Subject: configfs: switch ->default groups to a linked list Replace the current NULL-terminated array of default groups with a linked list. This gets rid of lots of nasty code to size and/or dynamically allocate the array. While we're at it also provide a conveniant helper to remove the default groups. Signed-off-by: Christoph Hellwig Acked-by: Felipe Balbi [drivers/usb/gadget] Acked-by: Joel Becker Acked-by: Nicholas Bellinger Reviewed-by: Sagi Grimberg --- drivers/usb/gadget/configfs.c | 36 ++--- drivers/usb/gadget/function/f_mass_storage.c | 6 +- drivers/usb/gadget/function/f_rndis.c | 5 +- drivers/usb/gadget/function/uvc_configfs.c | 198 +++++++++++---------------- 4 files changed, 97 insertions(+), 148 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index 590c44989e5e..2f8081f0f795 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -49,7 +49,6 @@ struct gadget_info { struct config_group configs_group; struct config_group strings_group; struct config_group os_desc_group; - struct config_group *default_groups[5]; struct mutex lock; struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; @@ -71,7 +70,6 @@ static inline struct gadget_info *to_gadget_info(struct config_item *item) struct config_usb_cfg { struct config_group group; struct config_group strings_group; - struct config_group *default_groups[2]; struct list_head string_list; struct usb_configuration c; struct list_head func_list; @@ -666,13 +664,12 @@ static struct config_group *config_desc_make( INIT_LIST_HEAD(&cfg->string_list); INIT_LIST_HEAD(&cfg->func_list); - cfg->group.default_groups = cfg->default_groups; - cfg->default_groups[0] = &cfg->strings_group; - config_group_init_type_name(&cfg->group, name, &gadget_config_type); + config_group_init_type_name(&cfg->strings_group, "strings", &gadget_config_name_strings_type); + configfs_add_default_group(&cfg->strings_group, &cfg->group); ret = usb_add_config_only(&gi->cdev, &cfg->c); if (ret) @@ -1149,15 +1146,11 @@ int usb_os_desc_prepare_interf_dir(struct config_group *parent, char **names, struct module *owner) { - struct config_group **f_default_groups, *os_desc_group, - **interface_groups; + struct config_group *os_desc_group; struct config_item_type *os_desc_type, *interface_type; vla_group(data_chunk); - vla_item(data_chunk, struct config_group *, f_default_groups, 2); vla_item(data_chunk, struct config_group, os_desc_group, 1); - vla_item(data_chunk, struct config_group *, interface_groups, - n_interf + 1); vla_item(data_chunk, struct config_item_type, os_desc_type, 1); vla_item(data_chunk, struct config_item_type, interface_type, 1); @@ -1165,18 +1158,14 @@ int usb_os_desc_prepare_interf_dir(struct config_group *parent, if (!vlabuf) return -ENOMEM; - f_default_groups = vla_ptr(vlabuf, data_chunk, f_default_groups); os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); - interface_groups = vla_ptr(vlabuf, data_chunk, interface_groups); interface_type = vla_ptr(vlabuf, data_chunk, interface_type); - parent->default_groups = f_default_groups; os_desc_type->ct_owner = owner; config_group_init_type_name(os_desc_group, "os_desc", os_desc_type); - f_default_groups[0] = os_desc_group; + configfs_add_default_group(os_desc_group, parent); - os_desc_group->default_groups = interface_groups; interface_type->ct_group_ops = &interf_grp_ops; interface_type->ct_attrs = interf_grp_attrs; interface_type->ct_owner = owner; @@ -1189,7 +1178,7 @@ int usb_os_desc_prepare_interf_dir(struct config_group *parent, config_group_init_type_name(&d->group, "", interface_type); config_item_set_name(&d->group.cg_item, "interface.%s", names[n_interf]); - interface_groups[n_interf] = &d->group; + configfs_add_default_group(&d->group, os_desc_group); } return 0; @@ -1423,20 +1412,23 @@ static struct config_group *gadgets_make( if (!gi) return ERR_PTR(-ENOMEM); - gi->group.default_groups = gi->default_groups; - gi->group.default_groups[0] = &gi->functions_group; - gi->group.default_groups[1] = &gi->configs_group; - gi->group.default_groups[2] = &gi->strings_group; - gi->group.default_groups[3] = &gi->os_desc_group; + config_group_init_type_name(&gi->group, name, &gadget_root_type); config_group_init_type_name(&gi->functions_group, "functions", &functions_type); + configfs_add_default_group(&gi->functions_group, &gi->group); + config_group_init_type_name(&gi->configs_group, "configs", &config_desc_type); + configfs_add_default_group(&gi->configs_group, &gi->group); + config_group_init_type_name(&gi->strings_group, "strings", &gadget_strings_strings_type); + configfs_add_default_group(&gi->strings_group, &gi->group); + config_group_init_type_name(&gi->os_desc_group, "os_desc", &os_desc_type); + configfs_add_default_group(&gi->os_desc_group, &gi->group); gi->composite.bind = configfs_do_nothing; gi->composite.unbind = configfs_do_nothing; @@ -1461,8 +1453,6 @@ static struct config_group *gadgets_make( if (!gi->composite.gadget_driver.function) goto err; - config_group_init_type_name(&gi->group, name, - &gadget_root_type); return &gi->group; err: kfree(gi); diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c index 223ccf89d226..142bb7763f2a 100644 --- a/drivers/usb/gadget/function/f_mass_storage.c +++ b/drivers/usb/gadget/function/f_mass_storage.c @@ -3484,12 +3484,12 @@ static struct usb_function_instance *fsg_alloc_inst(void) opts->lun0.lun = opts->common->luns[0]; opts->lun0.lun_id = 0; - config_group_init_type_name(&opts->lun0.group, "lun.0", &fsg_lun_type); - opts->default_groups[0] = &opts->lun0.group; - opts->func_inst.group.default_groups = opts->default_groups; config_group_init_type_name(&opts->func_inst.group, "", &fsg_func_type); + config_group_init_type_name(&opts->lun0.group, "lun.0", &fsg_lun_type); + configfs_add_default_group(&opts->lun0.group, &opts->func_inst.group); + return &opts->func_inst; release_buffers: diff --git a/drivers/usb/gadget/function/f_rndis.c b/drivers/usb/gadget/function/f_rndis.c index e587767e374c..f577eec88f8c 100644 --- a/drivers/usb/gadget/function/f_rndis.c +++ b/drivers/usb/gadget/function/f_rndis.c @@ -889,7 +889,6 @@ static void rndis_free_inst(struct usb_function_instance *f) free_netdev(opts->net); } - kfree(opts->rndis_os_desc.group.default_groups); /* single VLA chunk */ kfree(opts); } @@ -916,10 +915,10 @@ static struct usb_function_instance *rndis_alloc_inst(void) descs[0] = &opts->rndis_os_desc; names[0] = "rndis"; - usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs, - names, THIS_MODULE); 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); return &opts->func_inst; } diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c index ad8c9b05572d..66753ba7a42e 100644 --- a/drivers/usb/gadget/function/uvc_configfs.c +++ b/drivers/usb/gadget/function/uvc_configfs.c @@ -272,11 +272,6 @@ static struct config_item_type uvcg_default_processing_type = { /* struct uvcg_processing {}; */ -static struct config_group *uvcg_processing_default_groups[] = { - &uvcg_default_processing.group, - NULL, -}; - /* control/processing */ static struct uvcg_processing_grp { struct config_group group; @@ -394,11 +389,6 @@ static struct config_item_type uvcg_default_camera_type = { /* struct uvcg_camera {}; */ -static struct config_group *uvcg_camera_default_groups[] = { - &uvcg_default_camera.group, - NULL, -}; - /* control/terminal/camera */ static struct uvcg_camera_grp { struct config_group group; @@ -477,11 +467,6 @@ static struct config_item_type uvcg_default_output_type = { /* struct uvcg_output {}; */ -static struct config_group *uvcg_output_default_groups[] = { - &uvcg_default_output.group, - NULL, -}; - /* control/terminal/output */ static struct uvcg_output_grp { struct config_group group; @@ -491,12 +476,6 @@ static struct config_item_type uvcg_output_grp_type = { .ct_owner = THIS_MODULE, }; -static struct config_group *uvcg_terminal_default_groups[] = { - &uvcg_camera_grp.group, - &uvcg_output_grp.group, - NULL, -}; - /* control/terminal */ static struct uvcg_terminal_grp { struct config_group group; @@ -619,12 +598,6 @@ static struct config_item_type uvcg_control_class_type = { .ct_owner = THIS_MODULE, }; -static struct config_group *uvcg_control_class_default_groups[] = { - &uvcg_control_class_fs.group, - &uvcg_control_class_ss.group, - NULL, -}; - /* control/class */ static struct uvcg_control_class_grp { struct config_group group; @@ -634,14 +607,6 @@ static struct config_item_type uvcg_control_class_grp_type = { .ct_owner = THIS_MODULE, }; -static struct config_group *uvcg_control_default_groups[] = { - &uvcg_control_header_grp.group, - &uvcg_processing_grp.group, - &uvcg_terminal_grp.group, - &uvcg_control_class_grp.group, - NULL, -}; - /* control */ static struct uvcg_control_grp { struct config_group group; @@ -1780,11 +1745,6 @@ static struct config_item_type uvcg_default_color_matching_type = { /* struct uvcg_color_matching {}; */ -static struct config_group *uvcg_color_matching_default_groups[] = { - &uvcg_default_color_matching.group, - NULL, -}; - /* streaming/color_matching */ static struct uvcg_color_matching_grp { struct config_group group; @@ -2145,13 +2105,6 @@ static struct config_item_type uvcg_streaming_class_type = { .ct_owner = THIS_MODULE, }; -static struct config_group *uvcg_streaming_class_default_groups[] = { - &uvcg_streaming_class_fs.group, - &uvcg_streaming_class_hs.group, - &uvcg_streaming_class_ss.group, - NULL, -}; - /* streaming/class */ static struct uvcg_streaming_class_grp { struct config_group group; @@ -2161,15 +2114,6 @@ static struct config_item_type uvcg_streaming_class_grp_type = { .ct_owner = THIS_MODULE, }; -static struct config_group *uvcg_streaming_default_groups[] = { - &uvcg_streaming_header_grp.group, - &uvcg_uncompressed_grp.group, - &uvcg_mjpeg_grp.group, - &uvcg_color_matching_grp.group, - &uvcg_streaming_class_grp.group, - NULL, -}; - /* streaming */ static struct uvcg_streaming_grp { struct config_group group; @@ -2179,12 +2123,6 @@ static struct config_item_type uvcg_streaming_grp_type = { .ct_owner = THIS_MODULE, }; -static struct config_group *uvcg_default_groups[] = { - &uvcg_control_grp.group, - &uvcg_streaming_grp.group, - NULL, -}; - static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item) { return container_of(to_config_group(item), struct f_uvc_opts, @@ -2273,59 +2211,64 @@ static struct config_item_type uvc_func_type = { .ct_owner = THIS_MODULE, }; -static inline void uvcg_init_group(struct config_group *g, - struct config_group **default_groups, - const char *name, - struct config_item_type *type) -{ - g->default_groups = default_groups; - config_group_init_type_name(g, name, type); -} - int uvcg_attach_configfs(struct f_uvc_opts *opts) { config_group_init_type_name(&uvcg_control_header_grp.group, "header", &uvcg_control_header_grp_type); + config_group_init_type_name(&uvcg_default_processing.group, - "default", - &uvcg_default_processing_type); - uvcg_init_group(&uvcg_processing_grp.group, - uvcg_processing_default_groups, - "processing", - &uvcg_processing_grp_type); + "default", &uvcg_default_processing_type); + config_group_init_type_name(&uvcg_processing_grp.group, + "processing", &uvcg_processing_grp_type); + configfs_add_default_group(&uvcg_default_processing.group, + &uvcg_processing_grp.group); + config_group_init_type_name(&uvcg_default_camera.group, - "default", - &uvcg_default_camera_type); - uvcg_init_group(&uvcg_camera_grp.group, - uvcg_camera_default_groups, - "camera", - &uvcg_camera_grp_type); + "default", &uvcg_default_camera_type); + config_group_init_type_name(&uvcg_camera_grp.group, + "camera", &uvcg_camera_grp_type); + configfs_add_default_group(&uvcg_default_camera.group, + &uvcg_camera_grp.group); + config_group_init_type_name(&uvcg_default_output.group, - "default", - &uvcg_default_output_type); - uvcg_init_group(&uvcg_output_grp.group, - uvcg_output_default_groups, - "output", - &uvcg_output_grp_type); - uvcg_init_group(&uvcg_terminal_grp.group, - uvcg_terminal_default_groups, - "terminal", - &uvcg_terminal_grp_type); + "default", &uvcg_default_output_type); + config_group_init_type_name(&uvcg_output_grp.group, + "output", &uvcg_output_grp_type); + configfs_add_default_group(&uvcg_default_output.group, + &uvcg_output_grp.group); + + config_group_init_type_name(&uvcg_terminal_grp.group, + "terminal", &uvcg_terminal_grp_type); + configfs_add_default_group(&uvcg_camera_grp.group, + &uvcg_terminal_grp.group); + configfs_add_default_group(&uvcg_output_grp.group, + &uvcg_terminal_grp.group); + config_group_init_type_name(&uvcg_control_class_fs.group, - "fs", - &uvcg_control_class_type); + "fs", &uvcg_control_class_type); config_group_init_type_name(&uvcg_control_class_ss.group, - "ss", - &uvcg_control_class_type); - uvcg_init_group(&uvcg_control_class_grp.group, - uvcg_control_class_default_groups, + "ss", &uvcg_control_class_type); + config_group_init_type_name(&uvcg_control_class_grp.group, "class", &uvcg_control_class_grp_type); - uvcg_init_group(&uvcg_control_grp.group, - uvcg_control_default_groups, + configfs_add_default_group(&uvcg_control_class_fs.group, + &uvcg_control_class_grp.group); + configfs_add_default_group(&uvcg_control_class_ss.group, + &uvcg_control_class_grp.group); + + config_group_init_type_name(&uvcg_control_grp.group, "control", &uvcg_control_grp_type); + configfs_add_default_group(&uvcg_control_header_grp.group, + &uvcg_control_grp.group); + configfs_add_default_group(&uvcg_processing_grp.group, + &uvcg_control_grp.group); + configfs_add_default_group(&uvcg_terminal_grp.group, + &uvcg_control_grp.group); + configfs_add_default_group(&uvcg_control_class_grp.group, + &uvcg_control_grp.group); + config_group_init_type_name(&uvcg_streaming_header_grp.group, "header", &uvcg_streaming_header_grp_type); @@ -2338,30 +2281,47 @@ int uvcg_attach_configfs(struct f_uvc_opts *opts) config_group_init_type_name(&uvcg_default_color_matching.group, "default", &uvcg_default_color_matching_type); - uvcg_init_group(&uvcg_color_matching_grp.group, - uvcg_color_matching_default_groups, + config_group_init_type_name(&uvcg_color_matching_grp.group, "color_matching", &uvcg_color_matching_grp_type); + configfs_add_default_group(&uvcg_default_color_matching.group, + &uvcg_color_matching_grp.group); + config_group_init_type_name(&uvcg_streaming_class_fs.group, - "fs", - &uvcg_streaming_class_type); + "fs", &uvcg_streaming_class_type); config_group_init_type_name(&uvcg_streaming_class_hs.group, - "hs", - &uvcg_streaming_class_type); + "hs", &uvcg_streaming_class_type); config_group_init_type_name(&uvcg_streaming_class_ss.group, - "ss", - &uvcg_streaming_class_type); - uvcg_init_group(&uvcg_streaming_class_grp.group, - uvcg_streaming_class_default_groups, - "class", - &uvcg_streaming_class_grp_type); - uvcg_init_group(&uvcg_streaming_grp.group, - uvcg_streaming_default_groups, - "streaming", - &uvcg_streaming_grp_type); - uvcg_init_group(&opts->func_inst.group, - uvcg_default_groups, + "ss", &uvcg_streaming_class_type); + config_group_init_type_name(&uvcg_streaming_class_grp.group, + "class", &uvcg_streaming_class_grp_type); + configfs_add_default_group(&uvcg_streaming_class_fs.group, + &uvcg_streaming_class_grp.group); + configfs_add_default_group(&uvcg_streaming_class_hs.group, + &uvcg_streaming_class_grp.group); + configfs_add_default_group(&uvcg_streaming_class_ss.group, + &uvcg_streaming_class_grp.group); + + config_group_init_type_name(&uvcg_streaming_grp.group, + "streaming", &uvcg_streaming_grp_type); + configfs_add_default_group(&uvcg_streaming_header_grp.group, + &uvcg_streaming_grp.group); + configfs_add_default_group(&uvcg_uncompressed_grp.group, + &uvcg_streaming_grp.group); + configfs_add_default_group(&uvcg_mjpeg_grp.group, + &uvcg_streaming_grp.group); + configfs_add_default_group(&uvcg_color_matching_grp.group, + &uvcg_streaming_grp.group); + configfs_add_default_group(&uvcg_streaming_class_grp.group, + &uvcg_streaming_grp.group); + + config_group_init_type_name(&opts->func_inst.group, "", &uvc_func_type); + configfs_add_default_group(&uvcg_control_grp.group, + &opts->func_inst.group); + configfs_add_default_group(&uvcg_streaming_grp.group, + &opts->func_inst.group); + return 0; } -- cgit 1.4.1