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iommu/vt-d: Fix memory leak in intel_iommu_put_resv_regions() 

Commit 9d3a4de4cb ("iommu: Disambiguate MSI region types") changed
the reserved region type in intel_iommu_get_resv_regions() from
IOMMU_RESV_RESERVED to IOMMU_RESV_MSI, but it forgot to also change
the type in intel_iommu_put_resv_regions().

This leads to a memory leak, because now the check in
intel_iommu_put_resv_regions() for IOMMU_RESV_RESERVED will never
be true, and no allocated regions will be freed.

Fix this by changing the region type in intel_iommu_put_resv_regions()
to IOMMU_RESV_MSI, matching the type of the allocated regions.

Fixes: 9d3a4de4cb ("iommu: Disambiguate MSI region types")
Cc: <stable@vger.kernel.org> # v4.11+
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
hifive-unleashed-5.1
Gerald Schaefer 2019-01-16 20:11:44 +01:00 committed by Joerg Roedel
parent f1724c0883
commit 198bc3252e
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/intel-iommu.c
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@ -5294,7 +5294,7 @@ static void intel_iommu_put_resv_regions(struct device *dev,
struct iommu_resv_region *entry, *next;
list_for_each_entry_safe(entry, next, head, list) {
if (entry->type == IOMMU_RESV_RESERVED)
if (entry->type == IOMMU_RESV_MSI)
kfree(entry);
}
}