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diff --git a/Documentation/scsi/link_power_management_policy.txt b/Documentation/scsi/link_power_management_policy.txt
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+This parameter allows the user to set the link (interface) power management.
+There are 3 possible options:
+
+Value                   Effect
+----------------------------------------------------------------------------
+min_power               Tell the controller to try to make the link use the
+                        least possible power when possible.  This may
+                        sacrifice some performance due to increased latency
+                        when coming out of lower power states.
+
+max_performance         Generally, this means no power management.  Tell
+                        the controller to have performance be a priority
+                        over power management.
+
+medium_power            Tell the controller to enter a lower power state
+                        when possible, but do not enter the lowest power
+                        state, thus improving latency over min_power setting.
+
+