tree 8c94bda0e97d809ed69bfe5e51a1a064d5e27a9d
parent 1378889c563a2938d231203ed36c041af183b798
author Christoph Hellwig <hch@lst.de> 1443892567 +0200
committer James Bottomley <JBottomley@Odin.com> 1444238688 -0700

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>