From 2c34e68f426151bc6d16de6a187678f6693c0770 Mon Sep 17 00:00:00 2001
From: Yan Burman <yanb@mellanox.com>
Date: Tue, 11 Mar 2014 14:41:47 +0200
Subject: [PATCH] IB/mad: Check and handle potential DMA mapping errors

Running with DMA_API_DEBUG enabled and not checking for DMA mapping
errors triggers a kernel stack trace with "DMA-API: device driver
failed to check map error" message.  Add these checks to the MAD
module, both to be be more robust and also eliminate these
false-positive stack traces.

Signed-off-by: Yan Burman <yanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
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