libata: implement no[hs]rst force params

Implement force params nohrst, nosrst and norst.  This is to work
around reset related problems and ease debugging.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index a8976467a983..1150444a21ab 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1074,6 +1074,9 @@ and is between 256 and 4096 characters. It is defined in the file
 
                         * [no]ncq: Turn on or off NCQ.
 
+                        * nohrst, nosrst, norst: suppress hard, soft
+                          and both resets.
+
                         If there are multiple matching configurations changing
                         the same attribute, the last one is used.