From 1933861db4f7c9beecca5cc7460c6c814554cc34 Mon Sep 17 00:00:00 2001 From: Andrzej Pietrasiewicz Date: Tue, 3 Dec 2013 15:15:21 +0100 Subject: usb: gadget: configfs: allow setting function instance's name USB function's configfs config group is created in a generic way in usb/gadget/configfs.c:function_make(), which in turn delegates actual allocation and setup of the USB function instance to a particular implementation, e.g. in f_acm.c. The said implementation does its job in a parameter-less function e.g. acm_alloc_instance(), which results in creating an unnamed config group, whose name is set later in function_make(). function_make() creates the name by parsing a string of the form: . which comes from userspace as a parameter to mkdir invocation. Up to now only has been used, while has been ignored. This patch adds a set_inst_name() operation to struct usb_function_instance which allows passing the from function_make() so that it is not ignored. It is entirely up to the implementor of set_inst_name() what to do with the . In a typical case, the struct usb_function_instance is embedded in a larger struct which is retrieved in set_inst_name() with container_of(), and the larger struct contains a field to store the . Signed-off-by: Andrzej Pietrasiewicz Signed-off-by: Kyungmin Park Acked-by: Michal Nazarewicz Signed-off-by: Felipe Balbi --- include/linux/usb/composite.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux/usb') diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h index 5e61589fc166..dba63f53906c 100644 --- a/include/linux/usb/composite.h +++ b/include/linux/usb/composite.h @@ -468,6 +468,8 @@ struct usb_function_instance { struct config_group group; struct list_head cfs_list; struct usb_function_driver *fd; + int (*set_inst_name)(struct usb_function_instance *inst, + const char *name); void (*free_func_inst)(struct usb_function_instance *inst); }; -- cgit v1.2.3