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Kirti Wankhede authored
Passing zero for the size to vfio_find_dma() isn't compatible with matching the start address of an existing vfio_dma. Doing so triggers a corner case. In vfio_find_dma(), when the start address is equal to dma->iova and size is 0, check for the end of search range makes it to take wrong side of RB-tree. That fails the search even though the address is present in mapped dma ranges. In functions pin_pages and unpin_pages, the iova which is being searched is base address of page to be pinned or unpinned. So here size should be set to PAGE_SIZE, as argument to vfio_find_dma(). Signed-off-by:
Kirti Wankhede <kwankhede@nvidia.com> Signed-off-by:
Neo Jia <cjia@nvidia.com> Signed-off-by:
Alex Williamson <alex.williamson@redhat.com>
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