From 9d51af7bd2f1d730cb6eeeb9ff837e3441ad4e07 Mon Sep 17 00:00:00 2001
From: Mark Lord <liml@rtr.ca>
Date: Tue, 10 Mar 2009 16:28:51 -0400
Subject: [PATCH] sata_mv: fix MSI irq race condition

Fix a (rare) race condition in mv_interrupt() when using MSI.

The value of hpriv->main_irq_mask_addr can change on on the fly,
and without this patch we could end up writing back a stale copy
to the hardware.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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