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| author | Damian Hobson-Garcia <dhobsong@igel.co.jp> | 2012-11-16 06:46:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-21 22:44:10 +0100 |
| commit | 87c4d1a7dce956b86e34329ed1b11a751ba9a8ea (patch) | |
| tree | c16d799b2c39dbe51045c30ee94e9a88ec609b89 /Documentation | |
| parent | drivers: uio_dmem_genirq: Don't mix address spaces for dynamic region vaddr (diff) | |
| download | linux-87c4d1a7dce956b86e34329ed1b11a751ba9a8ea.tar.xz linux-87c4d1a7dce956b86e34329ed1b11a751ba9a8ea.zip | |
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')
| -rw-r--r-- | Documentation/DocBook/uio-howto.tmpl | 2 |
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> |