From 97fe383222cb8a01fb67a8823498ad2edcc20b35 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@fb.com>
Date: Wed, 10 Dec 2014 13:02:44 -0700
Subject: [PATCH] NVMe: fix error return checking from blk_mq_alloc_request()

We return an error pointer or the request, not NULL. Half
the call paths got it right, the others didn't. Fix those up.

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