Commit dd82e668 authored Jun 13, 2019 by Jason Gunthorpe Committed by Doug Ledford Jun 20, 2019

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



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>

parent d384742e

drivers/infiniband/core/umem_odp.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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);

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