[SCSI] hpsa: Add transport_mode host attribute in /sys

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/Documentation/scsi/hpsa.txt b/Documentation/scsi/hpsa.txt
index b14e6ee00a95..880c085b951b 100644
--- a/Documentation/scsi/hpsa.txt
+++ b/Documentation/scsi/hpsa.txt
@@ -45,6 +45,7 @@ HPSA specific entries in /sys
 
   /sys/class/scsi_host/host*/rescan
   /sys/class/scsi_host/host*/firmware_revision
+  /sys/class/scsi_host/host*/transport_mode
 
   the host "rescan" attribute is a write only attribute.  Writing to this
   attribute will cause the driver to scan for new, changed, or removed devices
@@ -61,6 +62,10 @@ HPSA specific entries in /sys
         root@host:/sys/class/scsi_host/host4# cat firmware_revision
         7.14
 
+  The transport_mode indicates whether the controller is in "performant"
+  or "simple" mode.  This is controlled by the "hpsa_simple_mode" module
+  parameter.
+
   HPSA specific disk attributes:
   ------------------------------