'\" t
.\"     Title: bus_for_each_drv
.\"    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: Device drivers infrastructure
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "BUS_FOR_EACH_DRV" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Device drivers infrastructure"
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.SH "NAME"
bus_for_each_drv \- driver iterator
.SH "SYNOPSIS"
.HP \w'int\ bus_for_each_drv('u
.BI "int bus_for_each_drv(struct\ bus_type\ *\ " "bus" ", struct\ device_driver\ *\ " "start" ", void\ *\ " "data" ", int\ (*" "fn" ")\ (struct\ device_driver\ *,\ void\ *));"
.SH "ARGUMENTS"
.PP
\fIbus\fR
.RS 4
bus we\*(Aqre dealing with\&.
.RE
.PP
\fIstart\fR
.RS 4
driver to start iterating on\&.
.RE
.PP
\fIdata\fR
.RS 4
data to pass to the callback\&.
.RE
.PP
\fIfn\fR
.RS 4
function to call for each driver\&.
.RE
.SH "DESCRIPTION"
.PP
This is nearly identical to the device iterator above\&. We iterate over each driver that belongs to
\fIbus\fR, and call
\fIfn\fR
for each\&. If
\fIfn\fR
returns anything but 0, we break out and return it\&. If
\fIstart\fR
is not NULL, we use it as the head of the list\&.
.SH "NOTE"
.PP
we don\*(Aqt return the driver that returns a non\-zero value, nor do we leave the reference count incremented for that driver\&. If the caller needs to know that info, it must set it in the callback\&. It must also be sure to increment the refcount so it doesn\*(Aqt disappear before returning to the caller\&.
.SH "COPYRIGHT"
.br