From: Jeff Garzik <jgarzik@pobox.com>
Date: Fri, 16 Sep 2005 10:01:48 +0000 (-0400)
Subject: [libata] fix PIO completion race
X-Git-Tag: v2.6.14-rc2~5^2~65^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7fb6ec287a05d7a71ec086d8bc9a452d5e16ff1a;p=pandora-kernel.git

[libata] fix PIO completion race

Make sure we that completion is the final action we take; prior to this
change, another CPU may have changed ap->pio_task_state before we tested
it a final time.

Spotted by, and original patch by Albert Lee @ IBM.

Also includes a minor optimization:  eliminate a ton of unnecessary
queue_work() calls, simply by jumping to the beginning of the FSM
function ata_pio_task().
---

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