From 9e9c47d07d447e09a66ee528c3ebad9ba359af6a Mon Sep 17 00:00:00 2001
From: Eli Cohen <eli@dev.mellanox.co.il>
Date: Tue, 14 Jan 2014 17:45:21 +0200
Subject: [PATCH] IB/mlx5: Allow creation of QPs with zero-length work queues

The current code attmepts to call ib_umem_get() even if the length is
zero, which causes a failure. Since the spec allows zero length work
queues, change the code so we don't call ib_umem_get() in those cases.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
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