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RDMA/odp: Do not leak dma maps when working with huge pages

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The ib_dma_unmap_page() must match the length of the ib_dma_map_page(),
which is based on odp_shift. Otherwise iommu resources under this API
will not be properly freed.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Jason Gunthorpe 2019-06-13 21:46:45 -03:00 • committed by Doug Ledford
commit dd82e66889
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/core/umem_odp.c
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@ -730,7 +730,8 @@ void ib_umem_odp_unmap_dma_pages(struct ib_umem_odp *umem_odp, u64 virt,
WARN_ON(!dma_addr);
ib_dma_unmap_page(dev, dma_addr, PAGE_SIZE,
ib_dma_unmap_page(dev, dma_addr,
BIT(umem_odp->page_shift),
DMA_BIDIRECTIONAL);
if (dma & ODP_WRITE_ALLOWED_BIT) {
struct page *head_page = compound_head(page);