<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <HTML ><HEAD ><TITLE >usb_free_urb</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="The Linux Kernel API" HREF="book1.html"><LINK REL="UP" TITLE="USB Devices" HREF="c12300.html"><LINK REL="PREVIOUS" TITLE="usb_alloc_urb" HREF="r12548.html"><LINK REL="NEXT" TITLE="usb_control_msg" HREF="r12605.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >The Linux Kernel API</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="r12548.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="r12605.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="AEN12577" ></A ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >usb_free_urb</SPAN ></SPAN ></H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN12581" ></A ><H2 >Name</H2 >usb_free_urb -- frees the memory used by a urb </DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN12584" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN12586" ></A ><P ></P ><P ><CODE ><CODE CLASS="FUNCDEF" >void <TT CLASS="FUNCTION" >usb_free_urb </TT ></CODE >(urb_t* <TT CLASS="PARAMETER" ><I >urb</I ></TT >);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN12592" ></A ><H2 >Arguments</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="PARAMETER" ><I >urb</I ></TT ></DT ><DD ><P > pointer to the urb to free </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN12600" ></A ><H2 >Description</H2 ><P > If an urb is created with a call to <TT CLASS="FUNCTION" >usb_create_urb</TT > it should be cleaned up with a call to <TT CLASS="FUNCTION" >usb_free_urb</TT > when the driver is finished with it. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="r12548.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="book1.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="r12605.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >usb_alloc_urb</SPAN ></SPAN ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="c12300.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >usb_control_msg</SPAN ></SPAN ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >