From: Tejun Heo <htejun@gmail.com>
Date: Tue, 8 Aug 2006 05:08:59 +0000 (+0900)
Subject: [PATCH] libata: clear sdev->locked on door lock failure
X-Git-Tag: v2.6.18-rc5~123^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=22aac0896b1b0b8cabaf00714c55dd12f25d5738;p=pandora-kernel.git

[PATCH] libata: clear sdev->locked on door lock failure

SCSI EH locks door if sdev->locked is set.  Sometimes door lock
command fails continuously (e.g. when medium is not present) and as
libata uses EH to acquire sense data, this easily creates a loop where
a failed lock door invokes EH and EH issues lock door on completion.

This patch clears sdev->locked on door lock failure to break this
loop.  This problem has been spotted and diagnosed by Unicorn Chang
<uchang@tw.ibm.com>.

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