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authorKirti Wankhede <kwankhede@nvidia.com>2016-12-06 23:58:12 +0530
committerAlex Williamson <alex.williamson@redhat.com>2016-12-06 12:35:53 -0700
commit2b8bb1d771f736b8b34bf160115aee1b12d29f83 (patch)
tree76746b82fb689a2c3c86ce0be03b573f80577359 /virt
parent7c03f428464333589f0c374b833af95777eb9dd8 (diff)
downloadlinux-2b8bb1d771f736b8b34bf160115aee1b12d29f83.tar.bz2
vfio iommu type1: Fix size argument to vfio_find_dma() in pin_pages/unpin_pages
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>
Diffstat (limited to 'virt')
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