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iommu/amd: Call free_iova_fast with pfn in map_sg 

In the error path of map_sg, free_iova_fast is being called with
address instead of the pfn. This results in a bad value getting into
the rcache, and can result in hitting a BUG_ON when
iova_magazine_free_pfns is called.

Cc: Joerg Roedel <joro@8bytes.org>
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
Fixes: 80187fd39d ("iommu/amd: Optimize map_sg and unmap_sg")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jerry Snitselaar 2019-01-17 12:29:02 -07:00 committed by Joerg Roedel
parent e8e683ae9a
commit 51d8838d66
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/amd_iommu.c
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@ -2623,7 +2623,7 @@ out_unmap:
}
out_free_iova:
free_iova_fast(&dma_dom->iovad, address, npages);
free_iova_fast(&dma_dom->iovad, address >> PAGE_SHIFT, npages);
out_err:
return 0;