From 03e83cbd34a4602bf0d750e5ff4bf8b7d0e066b2 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Mon, 27 Oct 2014 12:00:01 -0400
Subject: [PATCH] Revert "AHCI: Do not acquire ata_host::lock from single IRQ
 handler"

This reverts commit 33fb0d01ce60fe4c0c12c4f0c134c5cdb818ac5a.

18dcf433f3de ("AHCI: Optimize single IRQ interrupt processing") is
scheduled to be reverted.  This is an optimization dependent on the
mentioned commit.  Revert it first.

Signed-off-by: Tejun Heo <tj@kernel.org>
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