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(parent: 9c5c92e) | patch
iommu/arm-smmu: fix capability checking prior to device attach
authorWill Deacon <will.deacon@arm.com>
Fri, 4 Jul 2014 10:06:01 +0000 (11:06 +0100)
committerWill Deacon <will.deacon@arm.com>
Fri, 4 Jul 2014 12:16:05 +0000 (13:16 +0100)
commitd3bca16635ae7443139c4408def7c1a50755083f
treee88a4f7b1fca963cd350631aeb447694cc7b49fbtree | snapshot (tar.gz zip)
parent9c5c92e35cf5c4f7ee523d62a6bf9d5dc290350bcommit | diff
iommu/arm-smmu: fix capability checking prior to device attach

If somebody attempts to check the capability of an IOMMU domain prior to
device attach, then we'll try to dereference a NULL SMMU pointer through
the SMMU domain (since we can't determine the actual SMMU instance until
we have a device attached).

This patch fixes the capability check so that non-global features are
reported as being absent when no device is attached to the domain.

Signed-off-by: Will Deacon <will.deacon@arm.com>
drivers/iommu/arm-smmu.c diff | blob | blame | history