tree 2a6fcd529adaf3b08a06abebb95802dc838ea16d
parent 9cd9554615cba14f0877cc9972a6537ad2bdde61
author Christoph Hellwig <hch@lst.de> 1429775331 +0200
committer James Bottomley <JBottomley@Odin.com> 1430154619 -0700

3w-9xxx: fix command completion race

The 3w-9xxx driver needs to tear down the dma mappings before returning
the command to the midlayer, as there is no guarantee the sglist and
count are valid after that point.  Also remove the dma mapping helpers
which have another inherent race due to the request_id index.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Acked-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>