From 7401abf2f44695ef44eef47d5deba1c20214a063 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 15 May 2006 20:57:32 +0900
Subject: [PATCH] [PATCH] libata: clear ap->active_tag atomically w.r.t.
 command completion

ap->active_tag was cleared in ata_qc_free().  This left ap->active_tag
dangling after ata_qc_complete().  Spurious interrupts inbetween could
incorrectly access the qc.  Clear active_tag in ata_qc_complete().
This change is necessary for later EH changes.

Signed-off-by: Tejun Heo <htejun@gmail.com>
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