'\" t
.\"     Title: usb_string_ids_n
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: Kernel Mode Gadget API
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "USB_STRING_IDS_N" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Kernel Mode Gadget API"
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.SH "NAME"
usb_string_ids_n \- allocate unused string IDs in batch
.SH "SYNOPSIS"
.HP \w'int\ usb_string_ids_n('u
.BI "int usb_string_ids_n(struct\ usb_composite_dev\ *\ " "c" ", unsigned\ " "n" ");"
.SH "ARGUMENTS"
.PP
\fIc\fR
.RS 4
the device whose string descriptor IDs are being allocated
.RE
.PP
\fIn\fR
.RS 4
number of string IDs to allocate
.RE
.SH "CONTEXT"
.PP
single threaded during gadget setup
.SH "DESCRIPTION"
.PP
Returns the first requested ID\&. This ID and next
\fIn\fR\-1 IDs are now valid IDs\&. At least provided that
\fIn\fR
is non\-zero because if it is, returns last requested ID which is now very useful information\&.
.PP
@\fBusb_string_ids_n\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, @\fBusb_string_id\fR
or @\fBusb_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