ide: add "hdx=nodma" kernel parameter
* Add "hdx=nodma" option allowing user to disallow DMA for a given device.
* Obsolete "ide=nodma" option.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/Documentation/ide.txt b/Documentation/ide.txt
index c1640e3..1d50f23 100644
--- a/Documentation/ide.txt
+++ b/Documentation/ide.txt
@@ -242,6 +242,8 @@
and quite likely to cause trouble with
older/odd IDE drives.
+ "hdx=nodma" : disallow DMA
+
"hdx=swapdata" : when the drive is a disk, byte swap all data
"hdx=bswap" : same as above..........
@@ -286,8 +288,6 @@
"ide=reverse" : formerly called to pci sub-system, but now local.
- "ide=nodma" : disable DMA globally for the IDE subsystem.
-
The following are valid ONLY on ide0, which usually corresponds
to the first ATA interface found on the particular host, and the defaults for
the base,ctl ports must not be altered.