From: Christoph Hellwig <hch@lst.de>
Date: Tue, 16 Sep 2014 21:44:07 +0000 (-0700)
Subject: blk-mq: avoid infinite recursion with the FUA flag
X-Git-Tag: fixes-for-v3.18-merge-window~80^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a57a178a490345c7236b0077b3de005754389ed6;p=pandora-kernel.git

blk-mq: avoid infinite recursion with the FUA flag

We should not insert requests into the flush state machine from
blk_mq_insert_request.  All incoming flush requests come through
blk_{m,s}q_make_request and are handled there, while blk_execute_rq_nowait
should only be called for BLOCK_PC requests.  All other callers
deal with requests that already went through the flush statemchine
and shouldn't be reinserted into it.

Reported-by: Robert Elliott  <Elliott@hp.com>
Debugged-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

Reading git-diff-tree failed