From: Christoph Hellwig <hch@lst.de>
Date: Mon, 3 Nov 2014 13:09:02 +0000 (+0100)
Subject: scsi: always assign block layer tags if enabled
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~21^2~1^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2ecb204d07ac8debe3893c362415919bc78bebd6;p=pandora-kernel.git

scsi: always assign block layer tags if enabled

Allow a driver to ask for block layer tags by setting .use_blk_tags in the
host template, in which case it will always see a valid value in
request->tag, similar to the behavior when using blk-mq.  This means even
SCSI "untagged" commands will now have a tag, which is especially useful
when using a host-wide tag map.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
---

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