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

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commit 15e3d5a285 upstream.

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>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

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Christoph Hellwig 2015-10-03 19:16:07 +02:00 • committed by Luis Henriques

parent 495ec73d53

commit 9dca799169

1 changed files with 21 additions and 7 deletions

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drivers/scsi/3w-9xxx.c

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