'\" t
.\"     Title: mdiobus_read_nested
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: July 2017
.\"    Manual: Network device support
.\"    Source: Kernel Hackers Manual 4.11.6
.\"  Language: English
.\"
.TH "MDIOBUS_READ_NESTED" "9" "July 2017" "Kernel Hackers Manual 4\&.11\&" "Network device support"
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.SH "NAME"
mdiobus_read_nested \- Nested version of the mdiobus_read function
.SH "SYNOPSIS"
.HP \w'int\ mdiobus_read_nested('u
.BI "int mdiobus_read_nested(struct\ mii_bus\ *\ " "bus" ", int\ " "addr" ", u32\ " "regnum" ");"
.SH "ARGUMENTS"
.PP
\fIstruct mii_bus * bus\fR
.RS 4
the mii_bus struct
.RE
.PP
\fIint addr\fR
.RS 4
the phy address
.RE
.PP
\fIu32 regnum\fR
.RS 4
register number to read
.RE
.SH "DESCRIPTION"
.PP
In case of nested MDIO bus access avoid lockdep false positives by using
\fBmutex_lock_nested\fR\&.
.SH "NOTE"
.PP
MUST NOT be called from interrupt context, because the bus read/write functions may wait for an interrupt to conclude the operation\&.
.SH "COPYRIGHT"
.br