iommu: Don't overwrite domain pointer when there is no default_domain

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commit eebb8034a5 upstream.

IOMMU drivers that do not support default domains, but make
use of the the group->domain pointer can get that pointer
overwritten with NULL on device add/remove.

Make sure this can't happen by only overwriting the domain
pointer when it is NULL.

Fixes: 1228236de5 ('iommu: Move default domain allocation to iommu_group_get_for_dev()')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Joerg Roedel 2016-04-04 15:47:48 +02:00 • committed by Greg Kroah-Hartman

parent ee8516a130

commit ab6c5069d1

1 changed files with 2 additions and 1 deletions

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drivers/iommu/iommu.c

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