From: Tejun Heo <htejun@gmail.com>
Date: Mon, 15 May 2006 11:58:22 +0000 (+0900)
Subject: [PATCH] libata-eh: implement new EH
X-Git-Tag: v2.6.18-rc1~1079^2~98^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=022bdb075b9e1f224088a0b268de56268d7bc5b6;p=pandora-kernel.git

[PATCH] libata-eh: implement new EH

Implement new EH.  The exported interface is ata_do_eh() which is to
be called from ->error_handler and performs the following steps to
recover the failed port.

ata_eh_autopsy() : analyze SError/TF, determine the cause of failure
		   and required recovery actions and record it in
		   ap->eh_context
ata_eh_report()	 : report the failure to user
ata_eh_recover() : perform recovery actions described in ap->eh_context
ata_eh_finish()	 : finish failed qcs

LLDDs can customize error handling by modifying eh_context before
calling ata_do_eh() or, if necessary, doing so inbetween each major
steps by calling each step explicitly.

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