From: Tejun Heo <tj@kernel.org>
Date: Mon, 11 Jan 2010 02:14:44 +0000 (+0900)
Subject: libata: retry link resume if necessary
X-Git-Tag: v2.6.33-rc4~6^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5040ab67a2c6d5710ba497dc52a8f7035729d7b0;p=pandora-kernel.git

libata: retry link resume if necessary

Interestingly, when SIDPR is used in ata_piix, writes to DET in
SControl sometimes get ignored leading to detection failure.  Update
sata_link_resume() such that it reads back SControl after clearing DET
and retry if it's not clear.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: fengxiangjun <fengxiangjun@neusoft.com>
Reported-by: Jim Faulkner <jfaulkne@ccs.neu.edu>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

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