From 40c6023031369ae5573e622ca54fa3ffe89fb865 Mon Sep 17 00:00:00 2001
From: Tejun Heo <teheo@novell.com>
Date: Thu, 9 Sep 2010 17:13:31 +0200
Subject: [PATCH] libata,pata_via: revert ata_wait_idle() removal from
 ata_sff/via_tf_load()

Commit 978c0666 (libata: Remove excess delay in the tf_load path)
removed ata_wait_idle() from ata_sff_tf_load() and via_tf_load().
This caused obscure detection problems in sata_sil.

  https://bugzilla.kernel.org/show_bug.cgi?id=16606

The commit was pure performance optimization.  Revert it for now.

Reported-by: Dieter Plaetinck <dieter@plaetinck.be>
Reported-by: Jan Beulich <JBeulich@novell.com>
Bisected-by: gianluca <gianluca@sottospazio.it>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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