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iommu/amd: Flush the IOMMU TLB before the addresses are freed

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This allows to keep the bitmap_lock only for a very short
period of time.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-12-21 13:23:59 +01:00
parent 53b3b65aa5
commit 84b3a0bc88
1 changed files with 4 additions and 4 deletions
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8
drivers/iommu/amd_iommu.c
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@ -2527,14 +2527,14 @@ static void __unmap_single(struct dma_ops_domain *dma_dom,
start += PAGE_SIZE;
}
SUB_STATS_COUNTER(alloced_io_mem, size);
dma_ops_free_addresses(dma_dom, dma_addr, pages);
if (amd_iommu_unmap_flush || dma_dom->need_flush) {
domain_flush_pages(&dma_dom->domain, flush_addr, size);
dma_dom->need_flush = false;
}
SUB_STATS_COUNTER(alloced_io_mem, size);
dma_ops_free_addresses(dma_dom, dma_addr, pages);
}
/*