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iommu/arm-smmu: remove potential NULL dereference on mapping path 

When handling mapping requests, we dereference the SMMU domain before
checking that it is NULL. This patch fixes the issue by removing the check
altogether, since we don't actually use the leaf_smmu when creating
mappings.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon 2013-11-08 15:08:06 +00:00
parent a44a9791e7
commit 5552ecdbf9
1 changed files with 1 additions and 2 deletions
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3
drivers/iommu/arm-smmu.c
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@ -1423,9 +1423,8 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int flags)
{
struct arm_smmu_domain *smmu_domain = domain->priv;
struct arm_smmu_device *smmu = smmu_domain->leaf_smmu;
if (!smmu_domain || !smmu)
if (!smmu_domain)
return -ENODEV;
/* Check for silent address truncation up the SMMU chain. */