From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bart Van Assche <bvanassche@acm.org>
Subject: [PATCH 0/3 v3] blk_cleanup_queue() versus request_fn order fix
Date: Thu, 27 Sep 2012 18:34:28 +0200
Message-ID: <50648014.7080308@acm.org>
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To: linux-scsi <linux-scsi@vger.kernel.org>, James Bottomley <jbottomley@parallels.com>, Mike Christie <michaelc@cs.wisc.edu>, Jens Axboe <axboe@kernel.dk>, Tejun Heo <tj@kernel.org>, Chanho Min <chanho.min@lge.com>

At device removal time request processing functions like
scsi_request_fn() that unlock the queue lock internally may cause
blk_cleanup_queue() to finish while request_fn is in progress.
This three-patch series makes sure that blk_cleanup_queue() can't
finish before all active request_fn calls have finished and also
that request_fn isn't invoked anymore after queue draining finished.

Changes compared to v2:
- Split second patch into two patches.
- Refined patch descriptions.

Changes compared to v1:
- Included a patch to rename QUEUE_FLAG_DEAD.
- Refined the descriptions of the __blk_run_queue_uncond() and
   blk_cleanup_queue() functions.