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authorDamian Hobson-Garcia <dhobsong@igel.co.jp>2012-11-16 09:46:10 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-11-22 01:44:10 +0400
commit87c4d1a7dce956b86e34329ed1b11a751ba9a8ea (patch)
treec16d799b2c39dbe51045c30ee94e9a88ec609b89 /Documentation/DocBook
parent24fce61b0b7f1bc94970036db1f1d65b0770d168 (diff)
downloadlinux-87c4d1a7dce956b86e34329ed1b11a751ba9a8ea.tar.xz
drivers: uio_dmem_genirq: Don't use DMA_ERROR_CODE to indicate unmapped regions
DMA_ERROR_CODE is not defined on all architectures and is architecture specific. Instead, use the constant, ~0 to indicate unmapped regions. Reported-by: Fengguang Wu <fengguang.wu@intel.com> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/DocBook')
-rw-r--r--Documentation/DocBook/uio-howto.tmpl2
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/DocBook/uio-howto.tmpl b/Documentation/DocBook/uio-howto.tmpl
index fdbf86fcfccd..ddb05e98af0d 100644
--- a/Documentation/DocBook/uio-howto.tmpl
+++ b/Documentation/DocBook/uio-howto.tmpl
@@ -771,7 +771,7 @@ framework to set up sysfs files for this region. Simply leave it alone.
<varname>/sys/class/uio/uioX/maps/mapY/*</varname>.
The dynmaic memory regions will be freed when the UIO device file is
closed. When no processes are holding the device file open, the address
- returned to userspace is DMA_ERROR_CODE.
+ returned to userspace is ~0.
</para>
</sect1>