From: Christoph Hellwig <hch@lst.de>
Date: Mon, 3 Nov 2014 18:36:40 +0000 (+0100)
Subject: scsi: only re-lock door after EH on devices that were reset
X-Git-Tag: v3.2.65~43
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cfc515ec1f3d3d501897b269b262cc13cec7f9ed;p=pandora-kernel.git

scsi: only re-lock door after EH on devices that were reset

commit 48379270fe6808cf4612ee094adc8da2b7a83baa upstream.

Setups that use the blk-mq I/O path can lock up if a host with a single
device that has its door locked enters EH.  Make sure to only send the
command to re-lock the door to devices that actually were reset and thus
might have lost their state.  Otherwise the EH code might be get blocked
on blk_get_request as all requests for non-reset devices might be in use.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Meelis Roos <meelis.roos@ut.ee>
Tested-by: Meelis Roos <meelis.roos@ut.ee>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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