'\" t
.\"     Title: usb_free_urb
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: USB Core APIs
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "USB_FREE_URB" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "USB Core APIs"
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.SH "NAME"
usb_free_urb \- frees the memory used by a urb when all users of it are finished
.SH "SYNOPSIS"
.HP \w'void\ usb_free_urb('u
.BI "void usb_free_urb(struct\ urb\ *\ " "urb" ");"
.SH "ARGUMENTS"
.PP
\fIurb\fR
.RS 4
pointer to the urb to free, may be NULL
.RE
.SH "DESCRIPTION"
.PP
Must be called when a user of a urb is finished with it\&. When the last user of the urb calls this function, the memory of the urb is freed\&.
.SH "NOTE"
.PP
The transfer buffer associated with the urb is not freed unless the URB_FREE_BUFFER transfer flag is set\&.
.SH "COPYRIGHT"
.br