From 15fe982e429e0e6b7466719acb6cfd9dbfe47f0c Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Wed, 23 Apr 2008 20:52:58 +0900
Subject: [PATCH] ahci: retry enabling AHCI a few times before spitting out
 WARN_ON()

Some chips need AHCI_EN set more than once to actually set it.  Try a
few times before giving up and spitting out WARN_ON().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Peer Chen <pchen@nvidia.com>
Cc: Volker Armin Hemmann <volker.armin.hemmann@tu-clausthal.de>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
Reading git-format-patch failed