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iommu/arm-smmu: Checks added for NULL pointer

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Added NULL checks to avoid NULL pointer dereference.

Change-Id: Id418925d708fa6bcafb37991d770d4ac7e2a69d9
Signed-off-by: Sushanth Vadapally <quic_vadapall@quicinc.com>
Signed-off-by: Madhu Ananthula <quic_mananthu@quicinc.com>
This commit is contained in:
Sushanth Vadapally
2023-09-26 12:31:33 +05:30
committed by Madhu Ananthula
parent 1b00e8fe32
commit 2c7a8e4126
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/arm/arm-smmu/arm-smmu.c
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@@ -453,14 +453,14 @@ static int __arm_smmu_alloc_cb(unsigned long *map, int start, int end,
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct arm_smmu_master_cfg *cfg = dev_iommu_priv_get(dev);
struct arm_smmu_device *smmu = cfg->smmu;
struct arm_smmu_device *smmu;
int idx;
int i;
int cb = -EINVAL;
if (!fwspec || !cfg)
return cb;
smmu = cfg->smmu;
for_each_cfg_sme(cfg, fwspec, i, idx) {
if (smmu->s2crs[idx].pinned)
cb = smmu->s2crs[idx].cbndx;