From: Christoph Hellwig <hch@lst.de>
Date: Sat, 3 Oct 2015 17:16:07 +0000 (+0200)
Subject: 3w-9xxx: don't unmap bounce buffered commands
X-Git-Tag: omap-for-v4.3/fixes-rc5~9^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=15e3d5a285ab9283136dba34bbf72886d9146706;p=pandora-kernel.git

3w-9xxx: don't unmap bounce buffered commands

3w controller don't dma map small single SGL entry commands but instead
bounce buffer them.  Add a helper to identify these commands and don't
call scsi_dma_unmap for them.

Based on an earlier patch from James Bottomley.

Fixes: 118c85 ("3w-9xxx: fix command completion race")
Reported-by: Tóth Attila <atoth@atoth.sote.hu>
Tested-by: Tóth Attila <atoth@atoth.sote.hu>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
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