'\" t
.\"     Title: dev_open
.\"    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: Network device support
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "DEV_OPEN" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Network device support"
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.SH "NAME"
dev_open \- prepare an interface for use\&.
.SH "SYNOPSIS"
.HP \w'int\ dev_open('u
.BI "int dev_open(struct\ net_device\ *\ " "dev" ");"
.SH "ARGUMENTS"
.PP
\fIdev\fR
.RS 4
device to open
.RE
.SH "DESCRIPTION"
.PP
Takes a device from down to up state\&. The device\*(Aqs private open function is invoked and then the multicast lists are loaded\&. Finally the device is moved into the up state and a
\fBNETDEV_UP\fR
message is sent to the netdev notifier chain\&.
.PP
Calling this function on an active interface is a nop\&. On a failure a negative errno code is returned\&.
.SH "COPYRIGHT"
.br