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authorRobin Murphy <robin.murphy@arm.com>2016-11-02 20:31:32 +0300
committerJoerg Roedel <jroedel@suse.de>2016-11-08 16:46:41 +0300
commit3c117b543528b0d25801bd75444037dd0fcd2b8d (patch)
tree301a1ee2e46951464c3ac173f45890ccd7787933 /drivers/iommu/arm-smmu.c
parentec615f43d3b61edcfdc4d8d1f672be1059573d1b (diff)
downloadlinux-3c117b543528b0d25801bd75444037dd0fcd2b8d.tar.xz
iommu/arm-smmu: Check that iommu_fwspecs are ours
We seem to have forgotten to check that iommu_fwspecs actually belong to us before we go ahead and dereference their private data. Oops. Fixes: 021bb8420d44 ("iommu/arm-smmu: Wire up generic configuration support") Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/arm-smmu.c')
-rw-r--r--drivers/iommu/arm-smmu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 3af7f8f62d0a..d388629ab990 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1400,7 +1400,7 @@ static int arm_smmu_add_device(struct device *dev)
fwspec = dev->iommu_fwspec;
if (ret)
goto out_free;
- } else if (fwspec) {
+ } else if (fwspec && fwspec->ops == &arm_smmu_ops) {
smmu = arm_smmu_get_by_node(to_of_node(fwspec->iommu_fwnode));
} else {
return -ENODEV;