From e32efbfc35c1b06f1bfe3e6d737acdd14d27baed Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@fb.com>
Date: Fri, 14 Nov 2014 09:49:26 -0700
Subject: [PATCH] NVMe: make setup work for devices that don't do INTx

The setup/probe part currently relies on INTx being there and
working, that's not always the case. For devices that don't
advertise INTx, enable a single MSIx vector early on and disable
it again before we ask for our full range of queue vecs.

Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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