From eeceec904031f859d3f348ab38fe4329c91f7550 Mon Sep 17 00:00:00 2001
From: Khalid Aziz <khalid.aziz@oracle.com>
Date: Fri, 13 Sep 2013 13:44:06 -0600
Subject: [PATCH] [SCSI] buslogic: Added check for DMA mapping errors

Added check for DMA mapping errors for request sense data
buffer. Checking for mapping error can avoid potential wild
writes. This patch was prompted by the warning from
dma_unmap when kernel is compiled with CONFIG_DMA_API_DEBUG.

Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com>
Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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