3w-9xxx: fix command completion race

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commit 118c855b56 upstream.

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>
Acked-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Christoph Hellwig 2015-04-23 09:48:51 +02:00 • committed by Greg Kroah-Hartman

parent c9589a979b

commit 28a50a3383

2 changed files with 13 additions and 49 deletions

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57

drivers/scsi/3w-9xxx.c

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5

drivers/scsi/3w-9xxx.h

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