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iommu/arm-smmu: Fix the error path in arm_smmu_add_device 

fwspec->iommu_priv is available only after arm_smmu_master_cfg
instance has been allocated. We shouldn't free it before that.
Also it's logical to free the master cfg itself without
checking for fwspec.

Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
[will: remove redundant assignment to fwspec]
Signed-off-by: Will Deacon <will.deacon@arm.com>
hifive-unleashed-5.1
Vivek Gautam 2017-07-06 15:07:00 +05:30 committed by Will Deacon
parent 2984f7f3bb
commit c54451a5e2
1 changed files with 3 additions and 4 deletions
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7
drivers/iommu/arm-smmu.c
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@ -1519,7 +1519,6 @@ static int arm_smmu_add_device(struct device *dev)
if (using_legacy_binding) {
ret = arm_smmu_register_legacy_master(dev, &smmu);
fwspec = dev->iommu_fwspec;
if (ret)
goto out_free;
} else if (fwspec && fwspec->ops == &arm_smmu_ops) {
@ -1558,15 +1557,15 @@ static int arm_smmu_add_device(struct device *dev)
ret = arm_smmu_master_alloc_smes(dev);
if (ret)
goto out_free;
goto out_cfg_free;
iommu_device_link(&smmu->iommu, dev);
return 0;
out_cfg_free:
kfree(cfg);
out_free:
if (fwspec)
kfree(fwspec->iommu_priv);
iommu_fwspec_free(dev);
return ret;
}