From d891fa70876b37941a5c5bed813e73beb53ebcf7 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@fb.com>
Date: Mon, 16 Jun 2014 11:40:25 -0600
Subject: [PATCH] null_blk: fix softirq completions for queue_mode == 1

Only blk-mq completions have payload attached to the request, for
request_fn mode we have stored it in req->special. This fixes an
oops with queue_mode=1 and softirq completions.

Signed-off-by: Jens Axboe <axboe@fb.com>
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