Various sas_ata feature additions and EH fixes

Hi again,

As a companion to today's libsas roll-up, this is the queue of patches for the SATL connector between SAS and ATA. For patches not specifically focusing on SAS ATA, please refer to my previous email (or the patches themselves). Each patch has its own preamble description, but I'd like to call attention to a few of the larger shifts.

The most significant modifications are a few fixes to make ATAPI devices work again, the beginnings of SATA PHY control (as best as can be approximated), and integration with the new libsas EH strategy.

These patches should apply in number order cleanly against 2.6.19 + scsi_misc + aic94xx-sas. At the moment 2.6.20-rc isn't stable enough to boot cleanly on any of our machines, but we've been running insmod/rmmod and pounder tests on a x206m with mixed SAS/SATA/SATAPI devices for several days without problems.

One can pick up the patches at the URL below.

http://sweaglesw.net/~djwong/docs/sas_ata-patches/

A rough breakdown of the patches follows.

These patches were covered in my libsas email, though the numbers shift a bit.
03-libsas-discovery-failure_6.patch 04-libsas-discovery-failure-expander_6.patch 05-aic94xx-abort-task-race_2.patch 06-libsas-enable-phy_2.patch 07-libsas-taskless-cmnd-reset-timer_2.patch 08-libsas-kill-task-collector-after-ports_1.patch 09-aic94xx-set-max-execute-num_1.patch 10-libsas-use-scan-wildcard_1.patch 11-aic94xx-dont-eat-query-task-results_1.patch 12-libsas-remove-initiator-aborted_1.patch 13-libsas-add-dev-reset-to-eh_1.patch 14-libsas-abort-sas-task-deferral_1.patch 15-aic94xx-defer-task-abort_1.patch 16-libsas-smp-portal_1.patch
17-aic94xx-fix-fw-leak_1.patch 18-aic94xx-fix-ddb-scb-init_2.patch 19-aic94xx-lock-ddb-access_2.patch 20-libsas-phy-sysfs-ctrl-not-iwugo_1.patch 33-andmike-lockdep-fix.patch
34-malahal-discovery-race.patch 35-alexisb-aic94xx-abort-task-failed-fallthrough.patch

Roughly the same as last time:
21-libsas-ata-kconfig-fix_1.patch
22-libsas-fix-ata-qc-locking_3.patch
23-libsas-fix-qc-issue-err_1.patch
24-libsas-fix-libata-error_3.patch
25-libsas-ata-preserve-sactive_2.patch
31-libsas-satl-registration_3.patch
32-libsas-ata-module_3.patch

Add some semblance of PHY control:
26-libsas-ata-enable-phy_1.patch

ATAPI fixes:
27-libsas-atapi-sam-good_1.patch
28-libsas-ata-handle-unknown_1.patch

This patch enables ATAPI devices for patch testing, though jejb is working on a better fix:
02-libata-atapi-handle-failed-report-luns_2.patch

This goes with the new EH strategy code:
29-libsas-ata-assign-task-to-cmd_1.patch
30-libsas-ata-sas-task-abort_1.patch

I appreciate any feedback/comments/flames people have about this patch set. Thanks!

--D