From 7547881d0951384f9833ec3a80fac8f3f16f3b98 Mon Sep 17 00:00:00 2001
From: Matthew Wilcox <matthew.r.wilcox@intel.com>
Date: Wed, 16 Feb 2011 09:59:59 -0500
Subject: [PATCH] NVMe: Correct SQ doorbell semantics

The value written to the doorbell needs to be the first free index in
the queue, not the most recently used index in the queue.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
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