From: Tejun Heo <htejun@gmail.com>
Date: Mon, 15 May 2006 11:58:05 +0000 (+0900)
Subject: [PATCH] libata-eh-fw: implement new EH scheduling via error completion
X-Git-Tag: v2.6.18-rc1~1079^2~98^2~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f686bcb8078ac7505ec88818886c2c72639f4fc5;p=pandora-kernel.git

[PATCH] libata-eh-fw: implement new EH scheduling via error completion

There are several ways a qc can get schedule for EH in new EH.  This
patch implements one of them - completing a qc with ATA_QCFLAG_FAILED
set or with non-zero qc->err_mask.  ALL such qc's are examined by EH.

New EH schedules a qc for EH from completion iff ->error_handler is
implemented, qc is marked as failed or qc->err_mask is non-zero and
the command is not an internal command (internal cmd is handled via
->post_internal_cmd).  The EH scheduling itself is performed by asking
SCSI midlayer to schedule EH for the specified scmd.

For drivers implementing old-EH, nothing changes.  As this change
makes ata_qc_complete() rather large, it's not inlined anymore and
__ata_qc_complete() is exported to other parts of libata for later
use.

Signed-off-by: Tejun Heo <htejun@gmail.com>
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