From: Tejun Heo <htejun@gmail.com>
Date: Tue, 20 Feb 2007 14:27:06 +0000 (+0900)
Subject: libata: fix ata_scmd_need_defer()
X-Git-Tag: v2.6.21-rc2~25^2~36
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fcf1bf1584647f9fd864c193fee81840c4c5ce41;p=pandora-kernel.git

libata: fix ata_scmd_need_defer()

Fix ata_scmd_need_defer() such that...

* whether NCQ is used or not is exactly determined using the same
  criteria as the issue path.

* defer-check is performed in all cases.

This fixes race condition where turning off NCQ on the fly causes
non-NCQ commands sneak into NCQ phase.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

Reading git-diff-tree failed