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iommu/vt-d: Check the return value of iommu_device_create()

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This adds the proper check to alloc_iommu to make sure that
the call to iommu_device_create has completed successfully
and if not return the error code to the caller after freeing
up resources allocated previously.

Signed-off-by: Nicholas Krause <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>
This commit is contained in:
Nicholas Krause 2016-01-04 18:27:57 -05:00 • committed by Joerg Roedel
commit 592033790e
1 changed files with 6 additions and 0 deletions
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6
drivers/iommu/dmar.c
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@ -1070,6 +1070,12 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd)
intel_iommu_groups,
"%s", iommu->name);
if (IS_ERR(iommu->iommu_dev)) {
drhd->iommu = NULL;
err = PTR_ERR(iommu->iommu_dev);
goto err_unmap;
}
return 0;
err_unmap: