'\" t
.\"     Title: pci_bus_find_capability
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: April 2019
.\"    Manual: Hardware Interfaces
.\"    Source: Kernel Hackers Manual 4.9.168
.\"  Language: English
.\"
.TH "PCI_BUS_FIND_CAPABIL" "9" "April 2019" "Kernel Hackers Manual 4\&.9\&." "Hardware Interfaces"
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.SH "NAME"
pci_bus_find_capability \- query for devices\*(Aq capabilities
.SH "SYNOPSIS"
.HP \w'int\ pci_bus_find_capability('u
.BI "int pci_bus_find_capability(struct\ pci_bus\ *\ " "bus" ", unsigned\ int\ " "devfn" ", int\ " "cap" ");"
.SH "ARGUMENTS"
.PP
\fIbus\fR
.RS 4
the PCI bus to query
.RE
.PP
\fIdevfn\fR
.RS 4
PCI device to query
.RE
.PP
\fIcap\fR
.RS 4
capability code
.RE
.SH "DESCRIPTION"
.PP
Like
\fBpci_find_capability\fR
but works for pci devices that do not have a pci_dev structure set up yet\&.
.PP
Returns the address of the requested capability structure within the device\*(Aqs PCI configuration space or 0 in case the device does not support it\&.
.SH "COPYRIGHT"
.br