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Date:	Sat, 13 Sep 2014 16:40:07 -0700
From:	Christoph Hellwig <hch@....de>
To:	Jens Axboe <axboe@...com>
Cc:	Robert Elliott <elliott@...com>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: blk-mq timeout handling fixes

This series fixes various issues with timeout handling that Robert
ran into when testing scsi-mq heavily.  He tested an earlier version,
and couldn't reproduce the issues anymore, although the series changed
quite significantly since and should probably be retested.

In summary we not only start the blk-mq timer inside the drivers
->queue_rq method after the request has been fully setup, and we
also tell the drivers if we're timing out a reserved (internal)
request or a real one.  Many drivers including will need to handle
those internal ones differently, e.g. for scsi-mq we don't even
have a scsi command structure allocated for the reserved commands.

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