'\" t
.\"     Title: dma_release_from_coherent
.\"    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: Device drivers infrastructure
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "DMA_RELEASE_FROM_COH" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Device drivers infrastructure"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
dma_release_from_coherent \- try to free the memory allocated from per\-device coherent memory pool
.SH "SYNOPSIS"
.HP \w'int\ dma_release_from_coherent('u
.BI "int dma_release_from_coherent(struct\ device\ *\ " "dev" ", int\ " "order" ", void\ *\ " "vaddr" ");"
.SH "ARGUMENTS"
.PP
\fIdev\fR
.RS 4
device from which the memory was allocated
.RE
.PP
\fIorder\fR
.RS 4
the order of pages allocated
.RE
.PP
\fIvaddr\fR
.RS 4
virtual address of allocated pages
.RE
.SH "DESCRIPTION"
.PP
This checks whether the memory was allocated from the per\-device coherent memory pool and if so, releases that memory\&.
.PP
Returns 1 if we correctly released the memory, or 0 if
\fBdma_release_coherent\fR
should proceed with releasing memory from generic pools\&.
.SH "COPYRIGHT"
.br