'\" t
.\"     Title: usb_hcd_link_urb_to_ep
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Host Controller APIs
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "USB_HCD_LINK_URB_TO_" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Host Controller APIs"
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.SH "NAME"
usb_hcd_link_urb_to_ep \- add an URB to its endpoint queue
.SH "SYNOPSIS"
.HP \w'int\ usb_hcd_link_urb_to_ep('u
.BI "int usb_hcd_link_urb_to_ep(struct\ usb_hcd\ *\ " "hcd" ", struct\ urb\ *\ " "urb" ");"
.SH "ARGUMENTS"
.PP
\fIhcd\fR
.RS 4
host controller to which
\fIurb\fR
was submitted
.RE
.PP
\fIurb\fR
.RS 4
URB being submitted
.RE
.SH "DESCRIPTION"
.PP
Host controller drivers should call this routine in their
\fBenqueue\fR
method\&. The HCD\*(Aqs private spinlock must be held and interrupts must be disabled\&. The actions carried out here are required for URB submission, as well as for endpoint shutdown and for usb_kill_urb\&.
.SH "RETURN"
.PP
0 for no error, otherwise a negative error code (in which case the
\fBenqueue\fR
method must fail)\&. If no error occurs but
\fBenqueue\fR
fails anyway, it must call
\fBusb_hcd_unlink_urb_from_ep\fR
before releasing the private spinlock and returning\&.
.SH "COPYRIGHT"
.br