'\" t
.\"     Title: usb_string_id
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: June 2017
.\"    Manual: Kernel Mode Gadget API
.\"    Source: Kernel Hackers Manual 4.11.3
.\"  Language: English
.\"
.TH "USB_STRING_ID" "9" "June 2017" "Kernel Hackers Manual 4\&.11\&" "Kernel Mode Gadget API"
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.SH "NAME"
usb_string_id \- allocate an unused string ID
.SH "SYNOPSIS"
.HP \w'int\ usb_string_id('u
.BI "int usb_string_id(struct\ usb_composite_dev\ *\ " "cdev" ");"
.SH "ARGUMENTS"
.PP
\fIstruct usb_composite_dev * cdev\fR
.RS 4
the device whose string descriptor IDs are being allocated
.RE
.SH "CONTEXT"
.PP
single threaded during gadget setup
.SH "DESCRIPTION"
.PP
\fIusb_string_id\fR() is called from
\fBbind\fR
callbacks to allocate string IDs\&. Drivers for functions, configurations, or gadgets will then store that ID in the appropriate descriptors and string table\&.
.PP
All string identifier should be allocated using this,
\fIusb_string_ids_tab\fR() or
\fIusb_string_ids_n\fR() routine, to ensure that for example different functions don\*(Aqt wrongly assign different meanings to the same identifier\&.
.SH "AUTHOR"
.PP
\fBDavid Brownell\fR <\&dbrownell@users.sourceforge.net\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br